Chapter 9

Question 1

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

Answer 1

A.
Open wire

Question 2

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

Answer 2

C.
Wind resistance

Question 3

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

Answer 3

C.
400°C

Question 4

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

Answer 4

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

Question 5

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

Answer 5

E.
Direct

Question 6

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

Answer 6

D.
Individual room temperature control is difficult

Question 7

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)

Answer 7

E.
315°C - 455°C (600°F - 850°F)

Question 8

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

Answer 8

D.
Heat

Question 9

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

Answer 9

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

Question 10

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

Answer 10

C.
Direct

Question 11

Wall heaters may be of the _____ type
Select one:

A.
Tubular-cased wire

B.
Conduction

C.
Radiant

D.
Open wire

E.
Open ribbon.

Answer 11

C.
Radiant

Question 12

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

Answer 12

D.
The operation of the heating

Question 13

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

Answer 13

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

Question 14

Wall heaters may be of the _____ type
Select one:

A.
Open wire

B.
Open ribbon.

C.
Tubular-cased wire

D.
Conduction

E.
Forced convection

Answer 14

E.
Forced convection

Question 15

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

Answer 15

A.
The equipment requires more space

Question 16

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

Answer 16

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

Question 17

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

Answer 17

A.
Thermostat

Question 18

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)

Answer 18

E.
760°C - 900°C (1400°F - 1650°F)

Question 19

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

Answer 19

E.
The cost of installation is higher

Question 20

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

Answer 20

C.
Indirect

Question 21

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

Answer 21

E.
Tubular-cased wire

Question 22

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)

Answer 22

A.
980°C - 1260°C (1800°F - 2300°F)

Question 23

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

Answer 23

C.
Impact resistance

Question 24

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

Answer 24

A.
Radiant

Question 25

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)

Answer 25

D. 2°C (35.6°F)

Question 26

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

Answer 26

A. Open ribbon

Question 27

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)

Answer 27

A. Impact resistance

Question 28

An example of radiant area heating can be found in: Select one: A. Offices B. Skating arenas C. Residences D. Hotels E. Hospitals

Answer 28

B. Skating arenas