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HVAC > HVAC > Flashcards

HVAC Flashcards

1
Q

What does HVAC stand for?

A

Heating, Ventilation, and Air Conditioning

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2
Q

What is the function of a compressor in an HVAC system?

A

To increase the pressure and temperature of refrigerant gas

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3
Q

What is refrigerant?

A

A fluid used in HVAC systems to absorb and release heat for cooling and heating

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4
Q

What does SEER stand for?

A

Seasonal Energy Efficiency Ratio

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5
Q

How do you calculate BTU?

A

BTU is calculated based on heat required to raise 1 pound of water by 1°F

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2
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5
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6
Q

Define latent heat in HVAC.

A

Heat absorbed or released without temperature change, like during condensation or evaporation.

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7
Q

What is a thermostat used for?

A

To regulate the temperature by controlling HVAC operation

How well did you know this?
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3
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5
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8
Q

What is the purpose of an evaporator coil?

A

To absorb heat from the indoor air as the refrigerant evaporates

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5
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9
Q

Explain the concept of ‘tonnage’ in HVAC.

A

Refers to the cooling capacity of an AC system, where 1 ton equals 12,000 BTU/hr

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is airflow measured in?

A

Cubic Feet per Minute (CFM)

How well did you know this?
1
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2
3
4
5
Perfectly
11
Q

Name a common cause of HVAC refrigerant leaks.

A

Corrosion in the coils or connections, or physical damage to components

How well did you know this?
1
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2
3
4
5
Perfectly
12
Q

What safety precaution should be taken before working on an HVAC system?

A

Turn off power to the unit to prevent electric shock

How well did you know this?
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3
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5
Perfectly
13
Q

What is the role of a capacitor in an HVAC system?

A

To provide an initial energy boost to start the compressor and fan motors

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5
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14
Q

Define ‘Superheat’ in HVAC terms.

A

Temperature of refrigerant gas above its boiling point after evaporating

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15
Q

What is the difference between single-stage and multi-stage HVAC systems?

A

Single-stage operates at full capacity; multi-stage can adjust output to reduce energy usage.

How well did you know this?
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2
3
4
5
Perfectly
16
Q

What are the four main components of a refrigeration cycle?

A

Compressor, Condenser, Expansion valve, and Evaporator

How well did you know this?
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2
3
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5
Perfectly
17
Q

What is the purpose of the expansion valve in HVAC?

A

To reduce refrigerant pressure before entering the evaporator coil

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3
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5
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18
Q

What is an economizer in HVAC?

A

A device that uses outdoor air to help cool a building, saving energy on mechanical cooling.

How well did you know this?
1
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2
3
4
5
Perfectly
19
Q

Define Relative Humidity.

A

The amount of moisture in the air relative to the maximum amount it can hold at that temperature.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What does AFUE represent?

A

Annual Fuel Utilization Efficiency, indicating the efficiency of a gas furnace.

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2
3
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5
Perfectly
21
Q

What does HVAC stand for?

A

Heating, Ventilation, and Air Conditioning

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3
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22
Q

What is the function of a compressor in an HVAC system?

A

To increase the pressure and temperature of refrigerant gas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What is refrigerant?

A

A fluid used in HVAC systems to absorb and release heat for cooling and heating

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What does SEER stand for?

A

Seasonal Energy Efficiency Ratio

How well did you know this?
1
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2
3
4
5
Perfectly
25
Q

How do you calculate BTU?

A

BTU is calculated based on heat required to raise 1 pound of water by 1°F

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

Define latent heat in HVAC.

A

Heat absorbed or released without temperature change, like during condensation or evaporation.

How well did you know this?
1
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2
3
4
5
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27
Q

What is a thermostat used for?

A

To regulate the temperature by controlling HVAC operation

How well did you know this?
1
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2
3
4
5
Perfectly
28
Q

What is the purpose of an evaporator coil?

A

To absorb heat from the indoor air as the refrigerant evaporates

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

Explain the concept of ‘tonnage’ in HVAC.

A

Refers to the cooling capacity of an AC system, where 1 ton equals 12,000 BTU/hr

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

What is airflow measured in?

A

Cubic Feet per Minute (CFM)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

Name a common cause of HVAC refrigerant leaks.

A

Corrosion in the coils or connections, or physical damage to components

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

What safety precaution should be taken before working on an HVAC system?

A

Turn off power to the unit to prevent electric shock

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

What is the role of a capacitor in an HVAC system?

A

To provide an initial energy boost to start the compressor and fan motors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

Define ‘Superheat’ in HVAC terms.

A

Temperature of refrigerant gas above its boiling point after evaporating

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

What is the difference between single-stage and multi-stage HVAC systems?

A

Single-stage operates at full capacity; multi-stage can adjust output to reduce energy usage.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

What are the four main components of a refrigeration cycle?

A

Compressor, Condenser, Expansion valve, and Evaporator

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

What is the purpose of the expansion valve in HVAC?

A

To reduce refrigerant pressure before entering the evaporator coil

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

What is an economizer in HVAC?

A

A device that uses outdoor air to help cool a building, saving energy on mechanical cooling.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

Define Relative Humidity.

A

The amount of moisture in the air relative to the maximum amount it can hold at that temperature.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
40
Q

What does AFUE represent?

A

Annual Fuel Utilization Efficiency, indicating the efficiency of a gas furnace.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
41
Q

What does HVAC stand for?

A

Heating, Ventilation, and Air Conditioning

How well did you know this?
1
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5
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42
Q

What is the function of a compressor in an HVAC system?

A

To increase the pressure and temperature of refrigerant gas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
43
Q

What is refrigerant?

A

A fluid used in HVAC systems to absorb and release heat for cooling and heating

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
44
Q

What does SEER stand for?

A

Seasonal Energy Efficiency Ratio

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
45
Q

How do you calculate BTU?

A

BTU is calculated based on heat required to raise 1 pound of water by 1°F

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
46
Q

Define latent heat in HVAC.

A

Heat absorbed or released without temperature change, like during condensation or evaporation.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
47
Q

What is a thermostat used for?

A

To regulate the temperature by controlling HVAC operation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
48
Q

What is the purpose of an evaporator coil?

A

To absorb heat from the indoor air as the refrigerant evaporates

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
49
Q

Explain the concept of ‘tonnage’ in HVAC.

A

Refers to the cooling capacity of an AC system, where 1 ton equals 12,000 BTU/hr

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
50
Q

What is airflow measured in?

A

Cubic Feet per Minute (CFM)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
51
Q

Name a common cause of HVAC refrigerant leaks.

A

Corrosion in the coils or connections, or physical damage to components

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
52
Q

What safety precaution should be taken before working on an HVAC system?

A

Turn off power to the unit to prevent electric shock

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
53
Q

What is the role of a capacitor in an HVAC system?

A

To provide an initial energy boost to start the compressor and fan motors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
54
Q

Define ‘Superheat’ in HVAC terms.

A

Temperature of refrigerant gas above its boiling point after evaporating

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
55
Q

What is the difference between single-stage and multi-stage HVAC systems?

A

Single-stage operates at full capacity; multi-stage can adjust output to reduce energy usage.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
56
Q

What are the four main components of a refrigeration cycle?

A

Compressor, Condenser, Expansion valve, and Evaporator

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
57
Q

What is the purpose of the expansion valve in HVAC?

A

To reduce refrigerant pressure before entering the evaporator coil

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
58
Q

What is an economizer in HVAC?

A

A device that uses outdoor air to help cool a building, saving energy on mechanical cooling.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
59
Q

Define Relative Humidity.

A

The amount of moisture in the air relative to the maximum amount it can hold at that temperature.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
60
Q

What does AFUE represent?

A

Annual Fuel Utilization Efficiency, indicating the efficiency of a gas furnace.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
61
Q

What does HVAC stand for?

A

Heating, Ventilation, and Air Conditioning

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
62
Q

What is the function of a compressor in an HVAC system?

A

To increase the pressure and temperature of refrigerant gas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
63
Q

What is refrigerant?

A

A fluid used in HVAC systems to absorb and release heat for cooling and heating

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
64
Q

What does SEER stand for?

A

Seasonal Energy Efficiency Ratio

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
65
Q

How do you calculate BTU?

A

BTU is calculated based on heat required to raise 1 pound of water by 1°F

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
66
Q

Define latent heat in HVAC.

A

Heat absorbed or released without temperature change, like during condensation or evaporation.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
67
Q

What is a thermostat used for?

A

To regulate the temperature by controlling HVAC operation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
68
Q

What is the purpose of an evaporator coil?

A

To absorb heat from the indoor air as the refrigerant evaporates

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
69
Q

Explain the concept of ‘tonnage’ in HVAC.

A

Refers to the cooling capacity of an AC system, where 1 ton equals 12,000 BTU/hr

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
70
Q

What is airflow measured in?

A

Cubic Feet per Minute (CFM)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
71
Q

Name a common cause of HVAC refrigerant leaks.

A

Corrosion in the coils or connections, or physical damage to components

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
72
Q

What safety precaution should be taken before working on an HVAC system?

A

Turn off power to the unit to prevent electric shock

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
73
Q

What is the role of a capacitor in an HVAC system?

A

To provide an initial energy boost to start the compressor and fan motors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
74
Q

Define ‘Superheat’ in HVAC terms.

A

Temperature of refrigerant gas above its boiling point after evaporating

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
75
Q

What is the difference between single-stage and multi-stage HVAC systems?

A

Single-stage operates at full capacity; multi-stage can adjust output to reduce energy usage.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
76
Q

What are the four main components of a refrigeration cycle?

A

Compressor, Condenser, Expansion valve, and Evaporator

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
77
Q

What is the purpose of the expansion valve in HVAC?

A

To reduce refrigerant pressure before entering the evaporator coil

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
78
Q

What is an economizer in HVAC?

A

A device that uses outdoor air to help cool a building, saving energy on mechanical cooling.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
79
Q

Define Relative Humidity.

A

The amount of moisture in the air relative to the maximum amount it can hold at that temperature.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
80
Q

What does AFUE represent?

A

Annual Fuel Utilization Efficiency, indicating the efficiency of a gas furnace.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
81
Q

What does HVAC stand for?

A

Heating, Ventilation, and Air Conditioning

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
82
Q

What is the function of a compressor in an HVAC system?

A

To increase the pressure and temperature of refrigerant gas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
83
Q

What is refrigerant?

A

A fluid used in HVAC systems to absorb and release heat for cooling and heating

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
84
Q

What does SEER stand for?

A

Seasonal Energy Efficiency Ratio

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
85
Q

How do you calculate BTU?

A

BTU is calculated based on heat required to raise 1 pound of water by 1°F

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
86
Q

Define latent heat in HVAC.

A

Heat absorbed or released without temperature change, like during condensation or evaporation.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
87
Q

What is a thermostat used for?

A

To regulate the temperature by controlling HVAC operation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
88
Q

What is the purpose of an evaporator coil?

A

To absorb heat from the indoor air as the refrigerant evaporates

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
89
Q

Explain the concept of ‘tonnage’ in HVAC.

A

Refers to the cooling capacity of an AC system, where 1 ton equals 12,000 BTU/hr

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
90
Q

What is airflow measured in?

A

Cubic Feet per Minute (CFM)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
91
Q

Name a common cause of HVAC refrigerant leaks.

A

Corrosion in the coils or connections, or physical damage to components

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
92
Q

What safety precaution should be taken before working on an HVAC system?

A

Turn off power to the unit to prevent electric shock

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
93
Q

What is the role of a capacitor in an HVAC system?

A

To provide an initial energy boost to start the compressor and fan motors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
94
Q

Define ‘Superheat’ in HVAC terms.

A

Temperature of refrigerant gas above its boiling point after evaporating

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
95
Q

What is the difference between single-stage and multi-stage HVAC systems?

A

Single-stage operates at full capacity; multi-stage can adjust output to reduce energy usage.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
96
Q

What are the four main components of a refrigeration cycle?

A

Compressor, Condenser, Expansion valve, and Evaporator

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
97
Q

What is the purpose of the expansion valve in HVAC?

A

To reduce refrigerant pressure before entering the evaporator coil

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
98
Q

What is an economizer in HVAC?

A

A device that uses outdoor air to help cool a building, saving energy on mechanical cooling.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
99
Q

Define Relative Humidity.

A

The amount of moisture in the air relative to the maximum amount it can hold at that temperature.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
100
Q

What does AFUE represent?

A

Annual Fuel Utilization Efficiency, indicating the efficiency of a gas furnace.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
101
Q

What does HVAC stand for?

A

Heating, Ventilation, and Air Conditioning

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
102
Q

What is the function of a compressor in an HVAC system?

A

To increase the pressure and temperature of refrigerant gas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
103
Q

What is refrigerant?

A

A fluid used in HVAC systems to absorb and release heat for cooling and heating

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
104
Q

What does SEER stand for?

A

Seasonal Energy Efficiency Ratio

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
105
Q

How do you calculate BTU?

A

BTU is calculated based on heat required to raise 1 pound of water by 1°F

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
106
Q

Define latent heat in HVAC.

A

Heat absorbed or released without temperature change, like during condensation or evaporation.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
107
Q

What is a thermostat used for?

A

To regulate the temperature by controlling HVAC operation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
108
Q

What is the purpose of an evaporator coil?

A

To absorb heat from the indoor air as the refrigerant evaporates

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
109
Q

Explain the concept of ‘tonnage’ in HVAC.

A

Refers to the cooling capacity of an AC system, where 1 ton equals 12,000 BTU/hr

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
110
Q

What is airflow measured in?

A

Cubic Feet per Minute (CFM)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
111
Q

Name a common cause of HVAC refrigerant leaks.

A

Corrosion in the coils or connections, or physical damage to components

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
112
Q

What safety precaution should be taken before working on an HVAC system?

A

Turn off power to the unit to prevent electric shock

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
113
Q

What is the role of a capacitor in an HVAC system?

A

To provide an initial energy boost to start the compressor and fan motors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
114
Q

Define ‘Superheat’ in HVAC terms.

A

Temperature of refrigerant gas above its boiling point after evaporating

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
115
Q

What is the difference between single-stage and multi-stage HVAC systems?

A

Single-stage operates at full capacity; multi-stage can adjust output to reduce energy usage.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
116
Q

What are the four main components of a refrigeration cycle?

A

Compressor, Condenser, Expansion valve, and Evaporator

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
117
Q

What is the purpose of the expansion valve in HVAC?

A

To reduce refrigerant pressure before entering the evaporator coil

How well did you know this?
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3
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Perfectly
118
Q

What is an economizer in HVAC?

A

A device that uses outdoor air to help cool a building, saving energy on mechanical cooling.

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119
Q

Define Relative Humidity.

A

The amount of moisture in the air relative to the maximum amount it can hold at that temperature.

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120
Q

What does AFUE represent?

A

Annual Fuel Utilization Efficiency, indicating the efficiency of a gas furnace.

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121
Q

What does HVAC stand for?

A

Heating, Ventilation, and Air Conditioning

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122
Q

What is the function of a compressor in an HVAC system?

A

To increase the pressure and temperature of refrigerant gas

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123
Q

What is refrigerant?

A

A fluid used in HVAC systems to absorb and release heat for cooling and heating

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124
Q

What does SEER stand for?

A

Seasonal Energy Efficiency Ratio

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125
Q

How do you calculate BTU?

A

BTU is calculated based on heat required to raise 1 pound of water by 1°F

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126
Q

Define latent heat in HVAC.

A

Heat absorbed or released without temperature change, like during condensation or evaporation.

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127
Q

What is a thermostat used for?

A

To regulate the temperature by controlling HVAC operation

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128
Q

What is the purpose of an evaporator coil?

A

To absorb heat from the indoor air as the refrigerant evaporates

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129
Q

Explain the concept of ‘tonnage’ in HVAC.

A

Refers to the cooling capacity of an AC system, where 1 ton equals 12,000 BTU/hr

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130
Q

What is airflow measured in?

A

Cubic Feet per Minute (CFM)

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131
Q

Name a common cause of HVAC refrigerant leaks.

A

Corrosion in the coils or connections, or physical damage to components

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132
Q

What safety precaution should be taken before working on an HVAC system?

A

Turn off power to the unit to prevent electric shock

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133
Q

What is the role of a capacitor in an HVAC system?

A

To provide an initial energy boost to start the compressor and fan motors

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134
Q

Define ‘Superheat’ in HVAC terms.

A

Temperature of refrigerant gas above its boiling point after evaporating

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135
Q

What is the difference between single-stage and multi-stage HVAC systems?

A

Single-stage operates at full capacity; multi-stage can adjust output to reduce energy usage.

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136
Q

What are the four main components of a refrigeration cycle?

A

Compressor, Condenser, Expansion valve, and Evaporator

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137
Q

What is the purpose of the expansion valve in HVAC?

A

To reduce refrigerant pressure before entering the evaporator coil

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138
Q

What is an economizer in HVAC?

A

A device that uses outdoor air to help cool a building, saving energy on mechanical cooling.

How well did you know this?
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2
3
4
5
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139
Q

Define Relative Humidity.

A

The amount of moisture in the air relative to the maximum amount it can hold at that temperature.

How well did you know this?
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2
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140
Q

What does AFUE represent?

A

Annual Fuel Utilization Efficiency, indicating the efficiency of a gas furnace.

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141
Q

What does HVAC stand for?

A

Heating, Ventilation, and Air Conditioning

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142
Q

What is the function of a compressor in an HVAC system?

A

To increase the pressure and temperature of refrigerant gas

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143
Q

What is refrigerant?

A

A fluid used in HVAC systems to absorb and release heat for cooling and heating

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144
Q

What does SEER stand for?

A

Seasonal Energy Efficiency Ratio

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145
Q

How do you calculate BTU?

A

BTU is calculated based on heat required to raise 1 pound of water by 1°F

How well did you know this?
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2
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5
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146
Q

Define latent heat in HVAC.

A

Heat absorbed or released without temperature change, like during condensation or evaporation.

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147
Q

What is a thermostat used for?

A

To regulate the temperature by controlling HVAC operation

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148
Q

What is the purpose of an evaporator coil?

A

To absorb heat from the indoor air as the refrigerant evaporates

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149
Q

Explain the concept of ‘tonnage’ in HVAC.

A

Refers to the cooling capacity of an AC system, where 1 ton equals 12,000 BTU/hr

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2
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150
Q

What is airflow measured in?

A

Cubic Feet per Minute (CFM)

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151
Q

Name a common cause of HVAC refrigerant leaks.

A

Corrosion in the coils or connections, or physical damage to components

How well did you know this?
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152
Q

What safety precaution should be taken before working on an HVAC system?

A

Turn off power to the unit to prevent electric shock

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153
Q

What is the role of a capacitor in an HVAC system?

A

To provide an initial energy boost to start the compressor and fan motors

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154
Q

Define ‘Superheat’ in HVAC terms.

A

Temperature of refrigerant gas above its boiling point after evaporating

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155
Q

What is the difference between single-stage and multi-stage HVAC systems?

A

Single-stage operates at full capacity; multi-stage can adjust output to reduce energy usage.

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156
Q

What are the four main components of a refrigeration cycle?

A

Compressor, Condenser, Expansion valve, and Evaporator

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157
Q

What is the purpose of the expansion valve in HVAC?

A

To reduce refrigerant pressure before entering the evaporator coil

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158
Q

What is an economizer in HVAC?

A

A device that uses outdoor air to help cool a building, saving energy on mechanical cooling.

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2
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4
5
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159
Q

Define Relative Humidity.

A

The amount of moisture in the air relative to the maximum amount it can hold at that temperature.

How well did you know this?
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2
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4
5
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160
Q

What does AFUE represent?

A

Annual Fuel Utilization Efficiency, indicating the efficiency of a gas furnace.

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161
Q

What does HVAC stand for?

A

Heating, Ventilation, and Air Conditioning

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162
Q

What is the function of a compressor in an HVAC system?

A

To increase the pressure and temperature of refrigerant gas

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163
Q

What is refrigerant?

A

A fluid used in HVAC systems to absorb and release heat for cooling and heating

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164
Q

What does SEER stand for?

A

Seasonal Energy Efficiency Ratio

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165
Q

How do you calculate BTU?

A

BTU is calculated based on heat required to raise 1 pound of water by 1°F

How well did you know this?
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2
3
4
5
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166
Q

Define latent heat in HVAC.

A

Heat absorbed or released without temperature change, like during condensation or evaporation.

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167
Q

What is a thermostat used for?

A

To regulate the temperature by controlling HVAC operation

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168
Q

What is the purpose of an evaporator coil?

A

To absorb heat from the indoor air as the refrigerant evaporates

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169
Q

Explain the concept of ‘tonnage’ in HVAC.

A

Refers to the cooling capacity of an AC system, where 1 ton equals 12,000 BTU/hr

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2
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170
Q

What is airflow measured in?

A

Cubic Feet per Minute (CFM)

How well did you know this?
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171
Q

Name a common cause of HVAC refrigerant leaks.

A

Corrosion in the coils or connections, or physical damage to components

How well did you know this?
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172
Q

What safety precaution should be taken before working on an HVAC system?

A

Turn off power to the unit to prevent electric shock

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173
Q

What is the role of a capacitor in an HVAC system?

A

To provide an initial energy boost to start the compressor and fan motors

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174
Q

Define ‘Superheat’ in HVAC terms.

A

Temperature of refrigerant gas above its boiling point after evaporating

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175
Q

What is the difference between single-stage and multi-stage HVAC systems?

A

Single-stage operates at full capacity; multi-stage can adjust output to reduce energy usage.

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176
Q

What are the four main components of a refrigeration cycle?

A

Compressor, Condenser, Expansion valve, and Evaporator

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177
Q

What is the purpose of the expansion valve in HVAC?

A

To reduce refrigerant pressure before entering the evaporator coil

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178
Q

What is an economizer in HVAC?

A

A device that uses outdoor air to help cool a building, saving energy on mechanical cooling.

How well did you know this?
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2
3
4
5
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179
Q

Define Relative Humidity.

A

The amount of moisture in the air relative to the maximum amount it can hold at that temperature.

How well did you know this?
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2
3
4
5
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180
Q

What does AFUE represent?

A

Annual Fuel Utilization Efficiency, indicating the efficiency of a gas furnace.

How well did you know this?
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181
Q

What does HVAC stand for?

A

Heating, Ventilation, and Air Conditioning

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182
Q

What is the function of a compressor in an HVAC system?

A

To increase the pressure and temperature of refrigerant gas

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183
Q

What is refrigerant?

A

A fluid used in HVAC systems to absorb and release heat for cooling and heating

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184
Q

What does SEER stand for?

A

Seasonal Energy Efficiency Ratio

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185
Q

How do you calculate BTU?

A

BTU is calculated based on heat required to raise 1 pound of water by 1°F

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
186
Q

Define latent heat in HVAC.

A

Heat absorbed or released without temperature change, like during condensation or evaporation.

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187
Q

What is a thermostat used for?

A

To regulate the temperature by controlling HVAC operation

How well did you know this?
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188
Q

What is the purpose of an evaporator coil?

A

To absorb heat from the indoor air as the refrigerant evaporates

How well did you know this?
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2
3
4
5
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189
Q

Explain the concept of ‘tonnage’ in HVAC.

A

Refers to the cooling capacity of an AC system, where 1 ton equals 12,000 BTU/hr

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
190
Q

What is airflow measured in?

A

Cubic Feet per Minute (CFM)

How well did you know this?
1
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2
3
4
5
Perfectly
191
Q

Name a common cause of HVAC refrigerant leaks.

A

Corrosion in the coils or connections, or physical damage to components

How well did you know this?
1
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2
3
4
5
Perfectly
192
Q

What safety precaution should be taken before working on an HVAC system?

A

Turn off power to the unit to prevent electric shock

How well did you know this?
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2
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4
5
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193
Q

What is the role of a capacitor in an HVAC system?

A

To provide an initial energy boost to start the compressor and fan motors

How well did you know this?
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2
3
4
5
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194
Q

Define ‘Superheat’ in HVAC terms.

A

Temperature of refrigerant gas above its boiling point after evaporating

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195
Q

What is the difference between single-stage and multi-stage HVAC systems?

A

Single-stage operates at full capacity; multi-stage can adjust output to reduce energy usage.

How well did you know this?
1
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2
3
4
5
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196
Q

What are the four main components of a refrigeration cycle?

A

Compressor, Condenser, Expansion valve, and Evaporator

How well did you know this?
1
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2
3
4
5
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197
Q

What is the purpose of the expansion valve in HVAC?

A

To reduce refrigerant pressure before entering the evaporator coil

How well did you know this?
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2
3
4
5
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198
Q

What is an economizer in HVAC?

A

A device that uses outdoor air to help cool a building, saving energy on mechanical cooling.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
199
Q

Define Relative Humidity.

A

The amount of moisture in the air relative to the maximum amount it can hold at that temperature.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
200
Q

What does AFUE represent?

A

Annual Fuel Utilization Efficiency, indicating the efficiency of a gas furnace.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
201
Q

What does HVAC stand for?

A

Heating, Ventilation, and Air Conditioning

202
Q

What is the function of a compressor in an HVAC system?

A

To increase the pressure and temperature of refrigerant gas

203
Q

What is refrigerant?

A

A fluid used in HVAC systems to absorb and release heat for cooling and heating

204
Q

What does SEER stand for?

A

Seasonal Energy Efficiency Ratio

205
Q

How do you calculate BTU?

A

BTU is calculated based on heat required to raise 1 pound of water by 1°F

206
Q

Define latent heat in HVAC.

A

Heat absorbed or released without temperature change, like during condensation or evaporation.

207
Q

What is a thermostat used for?

A

To regulate the temperature by controlling HVAC operation

208
Q

What is the purpose of an evaporator coil?

A

To absorb heat from the indoor air as the refrigerant evaporates

209
Q

Explain the concept of ‘tonnage’ in HVAC.

A

Refers to the cooling capacity of an AC system, where 1 ton equals 12,000 BTU/hr

210
Q

What is airflow measured in?

A

Cubic Feet per Minute (CFM)

211
Q

Name a common cause of HVAC refrigerant leaks.

A

Corrosion in the coils or connections, or physical damage to components

212
Q

What safety precaution should be taken before working on an HVAC system?

A

Turn off power to the unit to prevent electric shock

213
Q

What is the role of a capacitor in an HVAC system?

A

To provide an initial energy boost to start the compressor and fan motors

214
Q

Define ‘Superheat’ in HVAC terms.

A

Temperature of refrigerant gas above its boiling point after evaporating

215
Q

What is the difference between single-stage and multi-stage HVAC systems?

A

Single-stage operates at full capacity; multi-stage can adjust output to reduce energy usage.

216
Q

What are the four main components of a refrigeration cycle?

A

Compressor, Condenser, Expansion valve, and Evaporator

217
Q

What is the purpose of the expansion valve in HVAC?

A

To reduce refrigerant pressure before entering the evaporator coil

218
Q

What is an economizer in HVAC?

A

A device that uses outdoor air to help cool a building, saving energy on mechanical cooling.

219
Q

Define Relative Humidity.

A

The amount of moisture in the air relative to the maximum amount it can hold at that temperature.

220
Q

What does AFUE represent?

A

Annual Fuel Utilization Efficiency, indicating the efficiency of a gas furnace.

221
Q

What does HVAC stand for?

A

Heating, Ventilation, and Air Conditioning

222
Q

What is the function of a compressor in an HVAC system?

A

To increase the pressure and temperature of refrigerant gas

223
Q

What is refrigerant?

A

A fluid used in HVAC systems to absorb and release heat for cooling and heating

224
Q

What does SEER stand for?

A

Seasonal Energy Efficiency Ratio

225
Q

How do you calculate BTU?

A

BTU is calculated based on heat required to raise 1 pound of water by 1°F

226
Q

Define latent heat in HVAC.

A

Heat absorbed or released without temperature change, like during condensation or evaporation.

227
Q

What is a thermostat used for?

A

To regulate the temperature by controlling HVAC operation

228
Q

What is the purpose of an evaporator coil?

A

To absorb heat from the indoor air as the refrigerant evaporates

229
Q

Explain the concept of ‘tonnage’ in HVAC.

A

Refers to the cooling capacity of an AC system, where 1 ton equals 12,000 BTU/hr

230
Q

What is airflow measured in?

A

Cubic Feet per Minute (CFM)

231
Q

Name a common cause of HVAC refrigerant leaks.

A

Corrosion in the coils or connections, or physical damage to components

232
Q

What safety precaution should be taken before working on an HVAC system?

A

Turn off power to the unit to prevent electric shock

233
Q

What is the role of a capacitor in an HVAC system?

A

To provide an initial energy boost to start the compressor and fan motors

234
Q

Define ‘Superheat’ in HVAC terms.

A

Temperature of refrigerant gas above its boiling point after evaporating

235
Q

What is the difference between single-stage and multi-stage HVAC systems?

A

Single-stage operates at full capacity; multi-stage can adjust output to reduce energy usage.

236
Q

What are the four main components of a refrigeration cycle?

A

Compressor, Condenser, Expansion valve, and Evaporator

237
Q

What is the purpose of the expansion valve in HVAC?

A

To reduce refrigerant pressure before entering the evaporator coil

238
Q

What is an economizer in HVAC?

A

A device that uses outdoor air to help cool a building, saving energy on mechanical cooling.

239
Q

Define Relative Humidity.

A

The amount of moisture in the air relative to the maximum amount it can hold at that temperature.

240
Q

What does AFUE represent?

A

Annual Fuel Utilization Efficiency, indicating the efficiency of a gas furnace.

241
Q

What does HVAC stand for?

A

Heating, Ventilation, and Air Conditioning

242
Q

What is the function of a compressor in an HVAC system?

A

To increase the pressure and temperature of refrigerant gas

243
Q

What is refrigerant?

A

A fluid used in HVAC systems to absorb and release heat for cooling and heating

244
Q

What does SEER stand for?

A

Seasonal Energy Efficiency Ratio

245
Q

How do you calculate BTU?

A

BTU is calculated based on heat required to raise 1 pound of water by 1°F

246
Q

Define latent heat in HVAC.

A

Heat absorbed or released without temperature change, like during condensation or evaporation.

247
Q

What is a thermostat used for?

A

To regulate the temperature by controlling HVAC operation

248
Q

What is the purpose of an evaporator coil?

A

To absorb heat from the indoor air as the refrigerant evaporates

249
Q

Explain the concept of ‘tonnage’ in HVAC.

A

Refers to the cooling capacity of an AC system, where 1 ton equals 12,000 BTU/hr

250
Q

What is airflow measured in?

A

Cubic Feet per Minute (CFM)

251
Q

Name a common cause of HVAC refrigerant leaks.

A

Corrosion in the coils or connections, or physical damage to components

252
Q

What safety precaution should be taken before working on an HVAC system?

A

Turn off power to the unit to prevent electric shock

253
Q

What is the role of a capacitor in an HVAC system?

A

To provide an initial energy boost to start the compressor and fan motors

254
Q

Define ‘Superheat’ in HVAC terms.

A

Temperature of refrigerant gas above its boiling point after evaporating

255
Q

What is the difference between single-stage and multi-stage HVAC systems?

A

Single-stage operates at full capacity; multi-stage can adjust output to reduce energy usage.

256
Q

What are the four main components of a refrigeration cycle?

A

Compressor, Condenser, Expansion valve, and Evaporator

257
Q

What is the purpose of the expansion valve in HVAC?

A

To reduce refrigerant pressure before entering the evaporator coil

258
Q

What is an economizer in HVAC?

A

A device that uses outdoor air to help cool a building, saving energy on mechanical cooling.

259
Q

Define Relative Humidity.

A

The amount of moisture in the air relative to the maximum amount it can hold at that temperature.

260
Q

What does AFUE represent?

A

Annual Fuel Utilization Efficiency, indicating the efficiency of a gas furnace.

261
Q

What does HVAC stand for?

A

Heating, Ventilation, and Air Conditioning

262
Q

What is the function of a compressor in an HVAC system?

A

To increase the pressure and temperature of refrigerant gas

263
Q

What is refrigerant?

A

A fluid used in HVAC systems to absorb and release heat for cooling and heating

264
Q

What does SEER stand for?

A

Seasonal Energy Efficiency Ratio

265
Q

How do you calculate BTU?

A

BTU is calculated based on heat required to raise 1 pound of water by 1°F

266
Q

Define latent heat in HVAC.

A

Heat absorbed or released without temperature change, like during condensation or evaporation.

267
Q

What is a thermostat used for?

A

To regulate the temperature by controlling HVAC operation

268
Q

What is the purpose of an evaporator coil?

A

To absorb heat from the indoor air as the refrigerant evaporates

269
Q

Explain the concept of ‘tonnage’ in HVAC.

A

Refers to the cooling capacity of an AC system, where 1 ton equals 12,000 BTU/hr

270
Q

What is airflow measured in?

A

Cubic Feet per Minute (CFM)

271
Q

Name a common cause of HVAC refrigerant leaks.

A

Corrosion in the coils or connections, or physical damage to components

272
Q

What safety precaution should be taken before working on an HVAC system?

A

Turn off power to the unit to prevent electric shock

273
Q

What is the role of a capacitor in an HVAC system?

A

To provide an initial energy boost to start the compressor and fan motors

274
Q

Define ‘Superheat’ in HVAC terms.

A

Temperature of refrigerant gas above its boiling point after evaporating

275
Q

What is the difference between single-stage and multi-stage HVAC systems?

A

Single-stage operates at full capacity; multi-stage can adjust output to reduce energy usage.

276
Q

What are the four main components of a refrigeration cycle?

A

Compressor, Condenser, Expansion valve, and Evaporator

277
Q

What is the purpose of the expansion valve in HVAC?

A

To reduce refrigerant pressure before entering the evaporator coil

278
Q

What is an economizer in HVAC?

A

A device that uses outdoor air to help cool a building, saving energy on mechanical cooling.

279
Q

Define Relative Humidity.

A

The amount of moisture in the air relative to the maximum amount it can hold at that temperature.

280
Q

What does AFUE represent?

A

Annual Fuel Utilization Efficiency, indicating the efficiency of a gas furnace.

281
Q

What does HVAC stand for?

A

Heating, Ventilation, and Air Conditioning

282
Q

What is the function of a compressor in an HVAC system?

A

To increase the pressure and temperature of refrigerant gas

283
Q

What is refrigerant?

A

A fluid used in HVAC systems to absorb and release heat for cooling and heating

284
Q

What does SEER stand for?

A

Seasonal Energy Efficiency Ratio

285
Q

How do you calculate BTU?

A

BTU is calculated based on heat required to raise 1 pound of water by 1°F

286
Q

Define latent heat in HVAC.

A

Heat absorbed or released without temperature change, like during condensation or evaporation.

287
Q

What is a thermostat used for?

A

To regulate the temperature by controlling HVAC operation

288
Q

What is the purpose of an evaporator coil?

A

To absorb heat from the indoor air as the refrigerant evaporates

289
Q

Explain the concept of ‘tonnage’ in HVAC.

A

Refers to the cooling capacity of an AC system, where 1 ton equals 12,000 BTU/hr

290
Q

What is airflow measured in?

A

Cubic Feet per Minute (CFM)

291
Q

Name a common cause of HVAC refrigerant leaks.

A

Corrosion in the coils or connections, or physical damage to components

292
Q

What safety precaution should be taken before working on an HVAC system?

A

Turn off power to the unit to prevent electric shock

293
Q

What is the role of a capacitor in an HVAC system?

A

To provide an initial energy boost to start the compressor and fan motors

294
Q

Define ‘Superheat’ in HVAC terms.

A

Temperature of refrigerant gas above its boiling point after evaporating

295
Q

What is the difference between single-stage and multi-stage HVAC systems?

A

Single-stage operates at full capacity; multi-stage can adjust output to reduce energy usage.

296
Q

What are the four main components of a refrigeration cycle?

A

Compressor, Condenser, Expansion valve, and Evaporator

297
Q

What is the purpose of the expansion valve in HVAC?

A

To reduce refrigerant pressure before entering the evaporator coil

298
Q

What is an economizer in HVAC?

A

A device that uses outdoor air to help cool a building, saving energy on mechanical cooling.

299
Q

Define Relative Humidity.

A

The amount of moisture in the air relative to the maximum amount it can hold at that temperature.

300
Q

What does AFUE represent?

A

Annual Fuel Utilization Efficiency, indicating the efficiency of a gas furnace.

301
Q

What does HVAC stand for?

A

Heating, Ventilation, and Air Conditioning

302
Q

What is the function of a compressor in an HVAC system?

A

To increase the pressure and temperature of refrigerant gas

303
Q

What is refrigerant?

A

A fluid used in HVAC systems to absorb and release heat for cooling and heating

304
Q

What does SEER stand for?

A

Seasonal Energy Efficiency Ratio

305
Q

How do you calculate BTU?

A

BTU is calculated based on heat required to raise 1 pound of water by 1°F

306
Q

Define latent heat in HVAC.

A

Heat absorbed or released without temperature change, like during condensation or evaporation.

307
Q

What is a thermostat used for?

A

To regulate the temperature by controlling HVAC operation

308
Q

What is the purpose of an evaporator coil?

A

To absorb heat from the indoor air as the refrigerant evaporates

309
Q

Explain the concept of ‘tonnage’ in HVAC.

A

Refers to the cooling capacity of an AC system, where 1 ton equals 12,000 BTU/hr

310
Q

What is airflow measured in?

A

Cubic Feet per Minute (CFM)

311
Q

Name a common cause of HVAC refrigerant leaks.

A

Corrosion in the coils or connections, or physical damage to components

312
Q

What safety precaution should be taken before working on an HVAC system?

A

Turn off power to the unit to prevent electric shock

313
Q

What is the role of a capacitor in an HVAC system?

A

To provide an initial energy boost to start the compressor and fan motors

314
Q

Define ‘Superheat’ in HVAC terms.

A

Temperature of refrigerant gas above its boiling point after evaporating

315
Q

What is the difference between single-stage and multi-stage HVAC systems?

A

Single-stage operates at full capacity; multi-stage can adjust output to reduce energy usage.

316
Q

What are the four main components of a refrigeration cycle?

A

Compressor, Condenser, Expansion valve, and Evaporator

317
Q

What is the purpose of the expansion valve in HVAC?

A

To reduce refrigerant pressure before entering the evaporator coil

318
Q

What is an economizer in HVAC?

A

A device that uses outdoor air to help cool a building, saving energy on mechanical cooling.

319
Q

Define Relative Humidity.

A

The amount of moisture in the air relative to the maximum amount it can hold at that temperature.

320
Q

What does AFUE represent?

A

Annual Fuel Utilization Efficiency, indicating the efficiency of a gas furnace.

321
Q

What does HVAC stand for?

A

Heating, Ventilation, and Air Conditioning

322
Q

What is the function of a compressor in an HVAC system?

A

To increase the pressure and temperature of refrigerant gas

323
Q

What is refrigerant?

A

A fluid used in HVAC systems to absorb and release heat for cooling and heating

324
Q

What does SEER stand for?

A

Seasonal Energy Efficiency Ratio

325
Q

How do you calculate BTU?

A

BTU is calculated based on heat required to raise 1 pound of water by 1°F

326
Q

Define latent heat in HVAC.

A

Heat absorbed or released without temperature change, like during condensation or evaporation.

327
Q

What is a thermostat used for?

A

To regulate the temperature by controlling HVAC operation

328
Q

What is the purpose of an evaporator coil?

A

To absorb heat from the indoor air as the refrigerant evaporates

329
Q

Explain the concept of ‘tonnage’ in HVAC.

A

Refers to the cooling capacity of an AC system, where 1 ton equals 12,000 BTU/hr

330
Q

What is airflow measured in?

A

Cubic Feet per Minute (CFM)

331
Q

Name a common cause of HVAC refrigerant leaks.

A

Corrosion in the coils or connections, or physical damage to components

332
Q

What safety precaution should be taken before working on an HVAC system?

A

Turn off power to the unit to prevent electric shock

333
Q

What is the role of a capacitor in an HVAC system?

A

To provide an initial energy boost to start the compressor and fan motors

334
Q

Define ‘Superheat’ in HVAC terms.

A

Temperature of refrigerant gas above its boiling point after evaporating

335
Q

What is the difference between single-stage and multi-stage HVAC systems?

A

Single-stage operates at full capacity; multi-stage can adjust output to reduce energy usage.

336
Q

What are the four main components of a refrigeration cycle?

A

Compressor, Condenser, Expansion valve, and Evaporator

337
Q

What is the purpose of the expansion valve in HVAC?

A

To reduce refrigerant pressure before entering the evaporator coil

338
Q

What is an economizer in HVAC?

A

A device that uses outdoor air to help cool a building, saving energy on mechanical cooling.

339
Q

Define Relative Humidity.

A

The amount of moisture in the air relative to the maximum amount it can hold at that temperature.

340
Q

What does AFUE represent?

A

Annual Fuel Utilization Efficiency, indicating the efficiency of a gas furnace.

341
Q

What does HVAC stand for?

A

Heating, Ventilation, and Air Conditioning

342
Q

What is the function of a compressor in an HVAC system?

A

To increase the pressure and temperature of refrigerant gas

343
Q

What is refrigerant?

A

A fluid used in HVAC systems to absorb and release heat for cooling and heating

344
Q

What does SEER stand for?

A

Seasonal Energy Efficiency Ratio

345
Q

How do you calculate BTU?

A

BTU is calculated based on heat required to raise 1 pound of water by 1°F

346
Q

Define latent heat in HVAC.

A

Heat absorbed or released without temperature change, like during condensation or evaporation.

347
Q

What is a thermostat used for?

A

To regulate the temperature by controlling HVAC operation

348
Q

What is the purpose of an evaporator coil?

A

To absorb heat from the indoor air as the refrigerant evaporates

349
Q

Explain the concept of ‘tonnage’ in HVAC.

A

Refers to the cooling capacity of an AC system, where 1 ton equals 12,000 BTU/hr

350
Q

What is airflow measured in?

A

Cubic Feet per Minute (CFM)

351
Q

Name a common cause of HVAC refrigerant leaks.

A

Corrosion in the coils or connections, or physical damage to components

352
Q

What safety precaution should be taken before working on an HVAC system?

A

Turn off power to the unit to prevent electric shock

353
Q

What is the role of a capacitor in an HVAC system?

A

To provide an initial energy boost to start the compressor and fan motors

354
Q

Define ‘Superheat’ in HVAC terms.

A

Temperature of refrigerant gas above its boiling point after evaporating

355
Q

What is the difference between single-stage and multi-stage HVAC systems?

A

Single-stage operates at full capacity; multi-stage can adjust output to reduce energy usage.

356
Q

What are the four main components of a refrigeration cycle?

A

Compressor, Condenser, Expansion valve, and Evaporator

357
Q

What is the purpose of the expansion valve in HVAC?

A

To reduce refrigerant pressure before entering the evaporator coil

358
Q

What is an economizer in HVAC?

A

A device that uses outdoor air to help cool a building, saving energy on mechanical cooling.

359
Q

Define Relative Humidity.

A

The amount of moisture in the air relative to the maximum amount it can hold at that temperature.

360
Q

What does AFUE represent?

A

Annual Fuel Utilization Efficiency, indicating the efficiency of a gas furnace.

361
Q

What does HVAC stand for?

A

Heating, Ventilation, and Air Conditioning

362
Q

What is the function of a compressor in an HVAC system?

A

To increase the pressure and temperature of refrigerant gas

363
Q

What is refrigerant?

A

A fluid used in HVAC systems to absorb and release heat for cooling and heating

364
Q

What does SEER stand for?

A

Seasonal Energy Efficiency Ratio

365
Q

How do you calculate BTU?

A

BTU is calculated based on heat required to raise 1 pound of water by 1°F

366
Q

Define latent heat in HVAC.

A

Heat absorbed or released without temperature change, like during condensation or evaporation.

367
Q

What is a thermostat used for?

A

To regulate the temperature by controlling HVAC operation

368
Q

What is the purpose of an evaporator coil?

A

To absorb heat from the indoor air as the refrigerant evaporates

369
Q

Explain the concept of ‘tonnage’ in HVAC.

A

Refers to the cooling capacity of an AC system, where 1 ton equals 12,000 BTU/hr

370
Q

What is airflow measured in?

A

Cubic Feet per Minute (CFM)

371
Q

Name a common cause of HVAC refrigerant leaks.

A

Corrosion in the coils or connections, or physical damage to components

372
Q

What safety precaution should be taken before working on an HVAC system?

A

Turn off power to the unit to prevent electric shock

373
Q

What is the role of a capacitor in an HVAC system?

A

To provide an initial energy boost to start the compressor and fan motors

374
Q

Define ‘Superheat’ in HVAC terms.

A

Temperature of refrigerant gas above its boiling point after evaporating

375
Q

What is the difference between single-stage and multi-stage HVAC systems?

A

Single-stage operates at full capacity; multi-stage can adjust output to reduce energy usage.

376
Q

What are the four main components of a refrigeration cycle?

A

Compressor, Condenser, Expansion valve, and Evaporator

377
Q

What is the purpose of the expansion valve in HVAC?

A

To reduce refrigerant pressure before entering the evaporator coil

378
Q

What is an economizer in HVAC?

A

A device that uses outdoor air to help cool a building, saving energy on mechanical cooling.

379
Q

Define Relative Humidity.

A

The amount of moisture in the air relative to the maximum amount it can hold at that temperature.

380
Q

What does AFUE represent?

A

Annual Fuel Utilization Efficiency, indicating the efficiency of a gas furnace.

381
Q

What does HVAC stand for?

A

Heating, Ventilation, and Air Conditioning

382
Q

What is the function of a compressor in an HVAC system?

A

To increase the pressure and temperature of refrigerant gas

383
Q

What is refrigerant?

A

A fluid used in HVAC systems to absorb and release heat for cooling and heating

384
Q

What does SEER stand for?

A

Seasonal Energy Efficiency Ratio

385
Q

How do you calculate BTU?

A

BTU is calculated based on heat required to raise 1 pound of water by 1°F

386
Q

Define latent heat in HVAC.

A

Heat absorbed or released without temperature change, like during condensation or evaporation.

387
Q

What is a thermostat used for?

A

To regulate the temperature by controlling HVAC operation

388
Q

What is the purpose of an evaporator coil?

A

To absorb heat from the indoor air as the refrigerant evaporates

389
Q

Explain the concept of ‘tonnage’ in HVAC.

A

Refers to the cooling capacity of an AC system, where 1 ton equals 12,000 BTU/hr

390
Q

What is airflow measured in?

A

Cubic Feet per Minute (CFM)

391
Q

Name a common cause of HVAC refrigerant leaks.

A

Corrosion in the coils or connections, or physical damage to components

392
Q

What safety precaution should be taken before working on an HVAC system?

A

Turn off power to the unit to prevent electric shock

393
Q

What is the role of a capacitor in an HVAC system?

A

To provide an initial energy boost to start the compressor and fan motors

394
Q

Define ‘Superheat’ in HVAC terms.

A

Temperature of refrigerant gas above its boiling point after evaporating

395
Q

What is the difference between single-stage and multi-stage HVAC systems?

A

Single-stage operates at full capacity; multi-stage can adjust output to reduce energy usage.

396
Q

What are the four main components of a refrigeration cycle?

A

Compressor, Condenser, Expansion valve, and Evaporator

397
Q

What is the purpose of the expansion valve in HVAC?

A

To reduce refrigerant pressure before entering the evaporator coil

398
Q

What is an economizer in HVAC?

A

A device that uses outdoor air to help cool a building, saving energy on mechanical cooling.

399
Q

Define Relative Humidity.

A

The amount of moisture in the air relative to the maximum amount it can hold at that temperature.

400
Q

What does AFUE represent?

A

Annual Fuel Utilization Efficiency, indicating the efficiency of a gas furnace.

401
Q

What does HVAC stand for?

A

Heating, Ventilation, and Air Conditioning

402
Q

What is the function of a compressor in an HVAC system?

A

To increase the pressure and temperature of refrigerant gas

403
Q

What is refrigerant?

A

A fluid used in HVAC systems to absorb and release heat for cooling and heating

404
Q

What does SEER stand for?

A

Seasonal Energy Efficiency Ratio

405
Q

How do you calculate BTU?

A

BTU is calculated based on heat required to raise 1 pound of water by 1°F

406
Q

Define latent heat in HVAC.

A

Heat absorbed or released without temperature change, like during condensation or evaporation.

407
Q

What is a thermostat used for?

A

To regulate the temperature by controlling HVAC operation

408
Q

What is the purpose of an evaporator coil?

A

To absorb heat from the indoor air as the refrigerant evaporates

409
Q

Explain the concept of ‘tonnage’ in HVAC.

A

Refers to the cooling capacity of an AC system, where 1 ton equals 12,000 BTU/hr

410
Q

What is airflow measured in?

A

Cubic Feet per Minute (CFM)

411
Q

Name a common cause of HVAC refrigerant leaks.

A

Corrosion in the coils or connections, or physical damage to components

412
Q

What safety precaution should be taken before working on an HVAC system?

A

Turn off power to the unit to prevent electric shock

413
Q

What is the role of a capacitor in an HVAC system?

A

To provide an initial energy boost to start the compressor and fan motors

414
Q

Define ‘Superheat’ in HVAC terms.

A

Temperature of refrigerant gas above its boiling point after evaporating

415
Q

What is the difference between single-stage and multi-stage HVAC systems?

A

Single-stage operates at full capacity; multi-stage can adjust output to reduce energy usage.

416
Q

What are the four main components of a refrigeration cycle?

A

Compressor, Condenser, Expansion valve, and Evaporator

417
Q

What is the purpose of the expansion valve in HVAC?

A

To reduce refrigerant pressure before entering the evaporator coil

418
Q

What is an economizer in HVAC?

A

A device that uses outdoor air to help cool a building, saving energy on mechanical cooling.

419
Q

Define Relative Humidity.

A

The amount of moisture in the air relative to the maximum amount it can hold at that temperature.

420
Q

What does AFUE represent?

A

Annual Fuel Utilization Efficiency, indicating the efficiency of a gas furnace.

421
Q

What does HVAC stand for?

A

Heating, Ventilation, and Air Conditioning

422
Q

What is the function of a compressor in an HVAC system?

A

To increase the pressure and temperature of refrigerant gas

423
Q

What is refrigerant?

A

A fluid used in HVAC systems to absorb and release heat for cooling and heating

424
Q

What does SEER stand for?

A

Seasonal Energy Efficiency Ratio

425
Q

How do you calculate BTU?

A

BTU is calculated based on heat required to raise 1 pound of water by 1°F

426
Q

Define latent heat in HVAC.

A

Heat absorbed or released without temperature change, like during condensation or evaporation.

427
Q

What is a thermostat used for?

A

To regulate the temperature by controlling HVAC operation

428
Q

What is the purpose of an evaporator coil?

A

To absorb heat from the indoor air as the refrigerant evaporates

429
Q

Explain the concept of ‘tonnage’ in HVAC.

A

Refers to the cooling capacity of an AC system, where 1 ton equals 12,000 BTU/hr

430
Q

What is airflow measured in?

A

Cubic Feet per Minute (CFM)

431
Q

Name a common cause of HVAC refrigerant leaks.

A

Corrosion in the coils or connections, or physical damage to components

432
Q

What safety precaution should be taken before working on an HVAC system?

A

Turn off power to the unit to prevent electric shock

433
Q

What is the role of a capacitor in an HVAC system?

A

To provide an initial energy boost to start the compressor and fan motors

434
Q

Define ‘Superheat’ in HVAC terms.

A

Temperature of refrigerant gas above its boiling point after evaporating

435
Q

What is the difference between single-stage and multi-stage HVAC systems?

A

Single-stage operates at full capacity; multi-stage can adjust output to reduce energy usage.

436
Q

What are the four main components of a refrigeration cycle?

A

Compressor, Condenser, Expansion valve, and Evaporator

437
Q

What is the purpose of the expansion valve in HVAC?

A

To reduce refrigerant pressure before entering the evaporator coil

438
Q

What is an economizer in HVAC?

A

A device that uses outdoor air to help cool a building, saving energy on mechanical cooling.

439
Q

Define Relative Humidity.

A

The amount of moisture in the air relative to the maximum amount it can hold at that temperature.

440
Q

What does AFUE represent?

A

Annual Fuel Utilization Efficiency, indicating the efficiency of a gas furnace.

441
Q

What does HVAC stand for?

A

Heating, Ventilation, and Air Conditioning

442
Q

What is the function of a compressor in an HVAC system?

A

To increase the pressure and temperature of refrigerant gas

443
Q

What is refrigerant?

A

A fluid used in HVAC systems to absorb and release heat for cooling and heating

444
Q

What does SEER stand for?

A

Seasonal Energy Efficiency Ratio

445
Q

How do you calculate BTU?

A

BTU is calculated based on heat required to raise 1 pound of water by 1°F

446
Q

Define latent heat in HVAC.

A

Heat absorbed or released without temperature change, like during condensation or evaporation.

447
Q

What is a thermostat used for?

A

To regulate the temperature by controlling HVAC operation

448
Q

What is the purpose of an evaporator coil?

A

To absorb heat from the indoor air as the refrigerant evaporates

449
Q

Explain the concept of ‘tonnage’ in HVAC.

A

Refers to the cooling capacity of an AC system, where 1 ton equals 12,000 BTU/hr

450
Q

What is airflow measured in?

A

Cubic Feet per Minute (CFM)

451
Q

Name a common cause of HVAC refrigerant leaks.

A

Corrosion in the coils or connections, or physical damage to components

452
Q

What safety precaution should be taken before working on an HVAC system?

A

Turn off power to the unit to prevent electric shock

453
Q

What is the role of a capacitor in an HVAC system?

A

To provide an initial energy boost to start the compressor and fan motors

454
Q

Define ‘Superheat’ in HVAC terms.

A

Temperature of refrigerant gas above its boiling point after evaporating

455
Q

What is the difference between single-stage and multi-stage HVAC systems?

A

Single-stage operates at full capacity; multi-stage can adjust output to reduce energy usage.

456
Q

What are the four main components of a refrigeration cycle?

A

Compressor, Condenser, Expansion valve, and Evaporator

457
Q

What is the purpose of the expansion valve in HVAC?

A

To reduce refrigerant pressure before entering the evaporator coil

458
Q

What is an economizer in HVAC?

A

A device that uses outdoor air to help cool a building, saving energy on mechanical cooling.

459
Q

Define Relative Humidity.

A

The amount of moisture in the air relative to the maximum amount it can hold at that temperature.

460
Q

What does AFUE represent?

A

Annual Fuel Utilization Efficiency, indicating the efficiency of a gas furnace.

461
Q

What does HVAC stand for?

A

Heating, Ventilation, and Air Conditioning

462
Q

What is the function of a compressor in an HVAC system?

A

To increase the pressure and temperature of refrigerant gas

463
Q

What is refrigerant?

A

A fluid used in HVAC systems to absorb and release heat for cooling and heating

464
Q

What does SEER stand for?

A

Seasonal Energy Efficiency Ratio

465
Q

How do you calculate BTU?

A

BTU is calculated based on heat required to raise 1 pound of water by 1°F

466
Q

Define latent heat in HVAC.

A

Heat absorbed or released without temperature change, like during condensation or evaporation.

467
Q

What is a thermostat used for?

A

To regulate the temperature by controlling HVAC operation

468
Q

What is the purpose of an evaporator coil?

A

To absorb heat from the indoor air as the refrigerant evaporates

469
Q

Explain the concept of ‘tonnage’ in HVAC.

A

Refers to the cooling capacity of an AC system, where 1 ton equals 12,000 BTU/hr

470
Q

What is airflow measured in?

A

Cubic Feet per Minute (CFM)

471
Q

Name a common cause of HVAC refrigerant leaks.

A

Corrosion in the coils or connections, or physical damage to components

472
Q

What safety precaution should be taken before working on an HVAC system?

A

Turn off power to the unit to prevent electric shock

473
Q

What is the role of a capacitor in an HVAC system?

A

To provide an initial energy boost to start the compressor and fan motors

474
Q

Define ‘Superheat’ in HVAC terms.

A

Temperature of refrigerant gas above its boiling point after evaporating

475
Q

What is the difference between single-stage and multi-stage HVAC systems?

A

Single-stage operates at full capacity; multi-stage can adjust output to reduce energy usage.

476
Q

What are the four main components of a refrigeration cycle?

A

Compressor, Condenser, Expansion valve, and Evaporator

477
Q

What is the purpose of the expansion valve in HVAC?

A

To reduce refrigerant pressure before entering the evaporator coil

478
Q

What is an economizer in HVAC?

A

A device that uses outdoor air to help cool a building, saving energy on mechanical cooling.

479
Q

Define Relative Humidity.

A

The amount of moisture in the air relative to the maximum amount it can hold at that temperature.

480
Q

What does AFUE represent?

A

Annual Fuel Utilization Efficiency, indicating the efficiency of a gas furnace.

481
Q

What does HVAC stand for?

A

Heating, Ventilation, and Air Conditioning

482
Q

What is the function of a compressor in an HVAC system?

A

To increase the pressure and temperature of refrigerant gas

483
Q

What is refrigerant?

A

A fluid used in HVAC systems to absorb and release heat for cooling and heating

484
Q

What does SEER stand for?

A

Seasonal Energy Efficiency Ratio

485
Q

How do you calculate BTU?

A

BTU is calculated based on heat required to raise 1 pound of water by 1°F

486
Q

Define latent heat in HVAC.

A

Heat absorbed or released without temperature change, like during condensation or evaporation.

487
Q

What is a thermostat used for?

A

To regulate the temperature by controlling HVAC operation

488
Q

What is the purpose of an evaporator coil?

A

To absorb heat from the indoor air as the refrigerant evaporates

489
Q

Explain the concept of ‘tonnage’ in HVAC.

A

Refers to the cooling capacity of an AC system, where 1 ton equals 12,000 BTU/hr

490
Q

What is airflow measured in?

A

Cubic Feet per Minute (CFM)

491
Q

Name a common cause of HVAC refrigerant leaks.

A

Corrosion in the coils or connections, or physical damage to components

492
Q

What safety precaution should be taken before working on an HVAC system?

A

Turn off power to the unit to prevent electric shock

493
Q

What is the role of a capacitor in an HVAC system?

A

To provide an initial energy boost to start the compressor and fan motors

494
Q

Define ‘Superheat’ in HVAC terms.

A

Temperature of refrigerant gas above its boiling point after evaporating

495
Q

What is the difference between single-stage and multi-stage HVAC systems?

A

Single-stage operates at full capacity; multi-stage can adjust output to reduce energy usage.

496
Q

What are the four main components of a refrigeration cycle?

A

Compressor, Condenser, Expansion valve, and Evaporator

497
Q

What is the purpose of the expansion valve in HVAC?

A

To reduce refrigerant pressure before entering the evaporator coil

498
Q

What is an economizer in HVAC?

A

A device that uses outdoor air to help cool a building, saving energy on mechanical cooling.

499
Q

Define Relative Humidity.

A

The amount of moisture in the air relative to the maximum amount it can hold at that temperature.

500
Q

What does AFUE represent?

A

Annual Fuel Utilization Efficiency, indicating the efficiency of a gas furnace.

HVAC (1 decks)

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