Book 2: 1-09 - "Infrared & Electrical Heating"

Question 1

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

A. Aquastat

B. Thermistor

C. Thermostat

D. Humidistat

E. Resistor

Answer 1

C. Thermostat

Question 2

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. 10°C (50°F)

C. 2°C (35.6°F)

D. 0°C (32°F)

E. 5°C (41°F)

Answer 2

C. 2°C (35.6°F)

Question 3

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

A. 315°C - 455°C (600°F - 850°F)

B. 400°C - 500°C (750°F - 930°F)

C. 980°C - 1260°C (1800°F - 2300°F)

D. 560°C - 790°C (1040°F - 1450°F)

E. 760°C - 900°C (1400°F - 1650°F)

Answer 3

E. 760°C - 900°C (1400°F - 1650°F)

Question 4

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

A. Hot water

B. Convection

C. Hot air

D. Direct

E. Radiant

Answer 4

D. Direct

Question 5

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. Individual room temperature control is difficult

C. The equipment requires less space

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

E. No combustion and combustion gases

Answer 5

B. Individual room temperature control is difficult

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 very noisy

B. The cost of installation is lower

C. Individual room temperature control is easily obtained

D. No combustion and combustion gases

E. The equipment requires less space

Answer 6

A. The operation of the heating devices very noisy

Question 7

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

A. Encased wire

B. Open band

C. Open tube

D. Encased tube

E. Open ribbon

Answer 7

E. Open ribbon

Question 8

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

A. 560°C - 790°C (1040°F - 1450°F)

B. 980°C - 1260°C (1800°F - 2300°F)

C. 760°C - 900°C (1400°F - 1650°F)

D. 400°C - 500°C (750°F - 930°F)

E. 315°C - 455°C (600°F - 850°F)

Answer 8

B. 980°C - 1260°C (1800°F - 2300°F)

Question 9

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

A. Encased tube

B. Tubular-cased wire

C. Encased wire

D. Open band

E. Encased ribbon

Answer 9

B. Tubular-cased wire

Question 10

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. Pressure

B. Energy

C. Heat

D. Power

E. Temperature

Answer 10

C. Heat

Question 11

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

D. Bulb similar to an incandescent light bulb

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

Answer 11

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

Question 12

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 higher

B. Individual room temperature control is easily obtained

C. No combustion and combustion gases

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

E. The equipment requires less space

Answer 12

A. The cost of installation is higher

Question 13

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. Bulb similar to an incandescent light bulb

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

E. Tube similar to a fluorescent tube

Answer 13

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

Question 14

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

A. Thermal shock resistance

B. Vibration resistance

C. Impact resistance

D. Wind resistance

E. Response Time (heat up)

Answer 14

C. Impact resistance

Question 15

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

A. 760°C - 900°C (1400°F - 1650°F)

B. 315°C - 455°C (600°F - 850°F)

C. 560°C - 790°C (1040°F - 1450°F)

D. 980°C - 1260°C (1800°F - 2300°F)

E. 400°C - 500°C (750°F - 930°F)

Answer 15

B. 315°C - 455°C (600°F - 850°F)

Question 16

Wall heaters may be of the _____ type
Select one:

A. Conduction

B. Open wire

C. Radiant

D. Open ribbon.

E. Tubular-cased wire

Answer 16

C. Radiant

Question 17

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. No combustion and combustion gases

D. The cost of installation is lower

E. Individual room temperature control is easily obtained

Answer 17

A. The equipment requires more space

Question 18

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. 760°C

B. 400°C

C. 560°C

D. 980°C

E. 315°C

Answer 18

B. 400°C

Question 19

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

A. Open wire

B. Open band

C. Encased wire

D. Open tube

E. Encased tube

Answer 19

A. Open wire

Question 20

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

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

B. Individual room temperature control is easily obtained

C. The cost of installation is lower

D. The equipment requires less space

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

Answer 20

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