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Second Half Book 2 > Chapter 9 > Flashcards

Chapter 9 Flashcards

1
Q

One type of electrical resistance heating element is the:
Select one:

A.
Open wire

B.
Encased tube

C.
Open tube

D.
Encased wire

E.
Open band

A

A.
Open wire

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2
Q

A disadvantage of the metal sheath electric infrared heating element is its:
Select one:

A.
Impact resistance

B.
Vibration resistance

C.
Wind resistance

D.
Thermal shock resistance

E.
Mounting position

A

C.
Wind resistance

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3
Q

Most of the heat developed by the internally fired or vented heater is transmitted to the emitting surface which reaches a temperature of:
Select one:

A.
980°C

B.
560°C

C.
400°C

D.
760°C

E.
315°C

A

C.
400°C

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4
Q

Some of these advantages of electricity as a source of heat over other heating systems include the following except:
Select one:

A.
The cost of installation is lower

B.
The equipment requires less space

C.
Individual room temperature control is easily obtained

D.
The operation of the heating devices is clean and silent

E.
It requires combustion air, a chimney, and fuel storage

A

E.
It requires combustion air, a chimney, and fuel storage

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5
Q

With the _____ heating method of heating the heat is transferred from the source of heat to the air and/or persons and objects in these areas.
Select one:

A.
Convection

B.
Radiant

C.
Hot water

D.
Steam

E.
Direct

A

E.
Direct

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6
Q

Some of these advantages of electricity as a source of heat over other heating systems include the following except:
Select one:

A.
The operation of the heating devices is clean and silent

B.
The equipment requires less space

C.
No combustion and combustion gases

D.
Individual room temperature control is difficult

E.
The cost of installation is lower

A

D.
Individual room temperature control is difficult

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7
Q

The emission temperatures of the low temperature catalytic heater vary from:
Select one:

A.
980°C - 1260°C (1800°F - 2300°F)

B.
760°C - 900°C (1400°F - 1650°F)

C.
560°C - 790°C (1040°F - 1450°F)

D.
400°C - 500°C (750°F - 930°F)

E.
315°C - 455°C (600°F - 850°F)

A

E.
315°C - 455°C (600°F - 850°F)

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8
Q

Infrared heaters send out radiant energy in the form of invisible infrared waves that strike a solid opaque object and converted into:
Select one:

A.
Power

B.
Pressure

C.
Energy

D.
Heat

E.
Temperature

A

D.
Heat

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9
Q

The quartz tube electric infrared heating element is a:
Select one:

A.
Tube similar to a fluorescent tube

B.
Metal tube 9.5 mm (3/8 in) in diameter and up to 198 cm (78 in) in length

C.
Coiled nickel-chrome element enclosed in an air-filled quartz tube with capped ends

D.
sealed quartz tube filled with inert gas containing a tungsten filament supported by tantalum spacers

E.
Bulb similar to an incandescent light bulb

A

C. Coiled nickel-chrome element enclosed in an air-filled quartz tube with capped ends

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10
Q

One of the general groups of using electricity for comfort heating is _____ heating.
Select one:

A.
Convection

B.
Hot air

C.
Direct

D.
Hot water

E.
Radiant

A

C.
Direct

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11
Q

Wall heaters may be of the _____ type
Select one:

A.
Tubular-cased wire

B.
Conduction

C.
Radiant

D.
Open wire

E.
Open ribbon.

A

C.
Radiant

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12
Q

Some of these advantages of electricity as a source of heat over other heating systems include the following except:
Select one:

A.
No combustion and combustion gases

B.
Individual room temperature control is easily obtained

C.
The cost of installation is lower

D.
The operation of the heating devices very noisy

E.
The equipment requires less space

A

D.
The operation of the heating

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13
Q

The quartz lamp electric infrared heating element is a:
Select one:

A.
sealed quartz tube filled with inert gas containing a tungsten filament supported by tantalum spacers

B.
Tube similar to a fluorescent tube

C.
Bulb similar to an incandescent light bulb

D.
Metal tube 9.5 mm (3/8 in) in diameter and up to 198 cm (78 in) in length

E.
coiled nickel-chrome element enclosed in an air-filled quartz tube with capped ends

A

A. sealed quartz tube filled with inert gas containing a tungsten filament supported by tantalum spacers

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14
Q

Wall heaters may be of the _____ type
Select one:

A.
Open wire

B.
Open ribbon.

C.
Tubular-cased wire

D.
Conduction

E.
Forced convection

A

E.
Forced convection

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15
Q

Some of these advantages of electricity as a source of heat over other heating systems include the following except:
Select one:

A.
The equipment requires more space

B.
The operation of the heating devices is clean and silent

C.
The cost of installation is lower

D.
Individual room temperature control is easily obtained

E.
No combustion and combustion gases

A

A.
The equipment requires more space

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16
Q

The metal sheath electric infrared heating element is a:
Select one:

A.
Metal tube 9.5 mm (3/8 in) in diameter and up to 198 cm (78 in) in length

B.
sealed quartz tube filled with inert gas containing a tungsten filament supported by tantalum spacers

C.
Tube similar to a fluorescent tube

D.
Coiled nickel-chrome element enclosed in an air-filled quartz tube with capped ends

E.
Bulb similar to an incandescent light bulb

A

A. Metal tube 9.5 mm (3/8 in) in diameter and up to 198 cm (78 in) in length

17
Q

Each electric resistance baseboard heater may be controlled by a _____ either directly mounted on the unit or on the wall.
Select one:

A.
Thermostat

B.
Thermistor

C.
Humidistat

D.
Aquastat

E.
Resistor

A

A.
Thermostat

18
Q

The surface combustion heater mat temperature of _____ will causing it to emit infrared radiant energy.
Select one:

A.
400°C - 500°C (750°F - 930°F)

B.
980°C - 1260°C (1800°F - 2300°F)

C.
560°C - 790°C (1040°F - 1450°F)

D.
315°C - 455°C (600°F - 850°F)

E.
760°C - 900°C (1400°F - 1650°F)

A

E.
760°C - 900°C (1400°F - 1650°F)

19
Q

Some of these advantages of electricity as a source of heat over other heating systems include the following except:
Select one:

A.
The equipment requires less space

B.
Individual room temperature control is easily obtained

C.
The operation of the heating devices is clean and silent

D.
No combustion and combustion gases

E.
The cost of installation is higher

A

E.
The cost of installation is higher

20
Q

One of the general groups of using electricity for comfort heating is _____ heating.
Select one:

A.
Hot water

B.
Convection

C.
Indirect

D.
Radiant

E.
Hot air

A

C.
Indirect

21
Q

One type of electrical resistance heating element is the:
Select one:

A.
Encased wire

B.
Open band

C.
Encased tube

D.
Encased ribbon

E.
Tubular-cased wire

A

E.
Tubular-cased wire

22
Q

What is the emission temperature of a directly fired refractory heater?
Select one:

A.
980°C - 1260°C (1800°F - 2300°F)

B.
760°C - 900°C (1400°F - 1650°F)

C.
400°C - 500°C (750°F - 930°F)

D.
315°C - 455°C (600°F - 850°F)

E.
560°C - 790°C (1040°F - 1450°F)

A

A.
980°C - 1260°C (1800°F - 2300°F)

23
Q

A disadvantage of the quartz bulb electric infrared heating element is its:
Select one:

A.
Wind resistance

B.
Vibration resistance

C.
Impact resistance

D.
Response Time (heat up)

E.
Thermal shock resistance

A

C.
Impact resistance

24
Q

Infrared heating is a form of _____ heating that only in recent times has found widespread use in comfort heating.
Select one:

A.
Radiant

B.
Convection

C.
Conduction

D.
Hot air

E.
Hydronic

A

A.
Radiant

25
Q

An outdoor thermostat should be incorporated in the control system to protect the snow melting system from accidental operation during warm weather, by turning the system off when outdoor ambient temperature rises above:
Select one:

A.
15°C (59°F)

B.
5°C (41°F)

C.
0°C (32°F)

D.
2°C (35.6°F)

E.
10°C (50°F)

A

D.
2°C (35.6°F)

26
Q

One type of electrical resistance heating element is the:
Select one:

A.
Open ribbon

B.
Encased wire

C.
Open tube

D.
Encased tube

E.
Open band

A

A.
Open ribbon

27
Q

A disadvantage of the quartz tube electric infrared heating element is its:
Select one:

A.
Impact resistance

B.
Wind resistance

C.
Vibration resistance

D.
Thermal shock resistance

E.
Response Time (heat up)

A

A.
Impact resistance

28
Q

An example of radiant area heating can be found in:
Select one:

A.
Offices

B.
Skating arenas

C.
Residences

D.
Hotels

E.
Hospitals

A

B.
Skating arenas

Second Half Book 2 (15 decks)

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