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BU > Finals > Flashcards

Finals Flashcards

1
Q

What are the four main functions that HVAC systems regulate?

A

Temperature, humidity, air quality, air movement

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2
Q

What is the primary purpose of HVAC systems?

A

To provide thermal comfort and acceptable indoor air quality

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3
Q

During which historical period did significant advancements in HVAC technology occur?

A

The Industrial Revolution

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4
Q

What do modern HVAC systems integrate for efficiency?

A

Heating, cooling, and ventilation

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5
Q

List three factors influencing HVAC design.

A
  • Building characteristics
  • Climate and location
  • Occupancy and usage
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6
Q

What are the three principles of heat transfer in HVAC systems?

A
  • Conduction
  • Convection
  • Radiation
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7
Q

Fill in the blank: The process of heat transfer through direct contact is called _______.

A

Conduction

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8
Q

Fill in the blank: The primary method of heat distribution in HVAC systems is _______.

A

Convection

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9
Q

What is the function of the compressor in the refrigeration cycle?

A

Increases the pressure and temperature of the refrigerant vapor

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10
Q

What happens during the condensation stage of the refrigeration cycle?

A

The hot refrigerant vapor releases heat and condenses into a high-pressure liquid

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11
Q

What is the purpose of an expansion valve in the refrigeration cycle?

A

Reduces the pressure and temperature of the refrigerant

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12
Q

What heating technologies are commonly used in HVAC systems?

A
  • Combustion
  • Electric resistance
  • Heat pumps
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13
Q

True or False: Modern HVAC systems do not focus on energy efficiency.

A

False

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14
Q

What components are typically found in Air Handling Units (AHUs)?

A
  • Fans
  • Heating and cooling coils
  • Filters
  • Dampers
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15
Q

What is the primary role of chillers in HVAC systems?

A

Remove heat from water for cooling

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16
Q

List the two types of air distribution devices in HVAC systems.

A
  • Diffusers
  • Grilles
17
Q

What is mechanical ventilation in HVAC systems?

A

Uses fans to circulate fresh air into buildings, removing stale air

18
Q

What does CO2 monitoring in HVAC systems measure?

A

Carbon dioxide levels as an indicator of air quality and occupancy

19
Q

What is essential for proper system sizing in HVAC design?

A

Accurate heating and cooling load calculations

20
Q

What is one benefit of using a programmable thermostat?

A

Regulates indoor temperature without manual intervention

21
Q

Fill in the blank: To prevent energy wastage, it is important to _______ your HVAC system when not in use.

A

Turn off

22
Q

What is the role of humidity control in HVAC systems?

A

Maintains optimal humidity levels to prevent mold growth and enhance comfort

23
Q

What does the process of air balancing involve?

A

Adjusting airflow to ensure proper distribution throughout the building

24
Q

True or False: Regular maintenance of HVAC systems is not necessary.

A

False

25
Q

What are two key trends in modern HVAC systems?

A
  • Smart technologies
  • Energy-efficient designs

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