Chapter 9 Infrared & Electric Heating Flashcards
1.The emission temperatures of the low temperature catalytic heater vary from:
A. 400°C - 500°C (750°F - 930°F)
B. 315°C - 455°C (600°F - 850°F)
C. 760°C - 900°C (1400°F - 1650°F)
D. 560°C - 790°C (1040°F - 1450°F)
E. 980°C - 1260°C (1800°F - 2300°F)
B. 315°C - 455°C (600°F - 850°F)
- What is the emission temperature of a directly tired refractory heater?
A. 400°C - 500°C (750°F - 930°F)
B. 315°C - 455°C (600°F - 850°F)
C. 760°C - 900°C (1400°F - 1650°F)
D. 560°C - 790°C (1040°F - 1450°F)
E. 980°C - 1260°C (1800°F - 2300°F
E. 980°C - 1260°C (1800°F - 2300°F
- Most of the heat developed by the internally fired or vented heater is transmitted to the emitting surface which reaches a temperature of:
A. 400°C
B. 315°C
C. 760°C
D. 560°C
E. 980°C
A. 400°C
- Some of these advantages of electricity as a source of heat over other heating systems include the following except:
A. No combustion and combustion gases
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. The cost of installation is higher
E. The cost of installation is higher
- Some of these advantages of electricity as a source of heat over other heating systems include the following except:
A. No combustion and combustion gases
B. The equipment requires less space
C. The cost of installation is lower
D. Individual room temperature control is difficult
E. The operation of the heating devices is clean and silent
D. Individual room temperature control is difficult
- One type of electrical resistance heating element is the:
A. Tubular-cased wire
B. Open band
C. Encased tube
D. Encased ribbon
E. Encased wire
A. Tubular-cased wire
- Some of these advantages of electricity as a source of heat over other heating systems include the following except:
A. The equipment requires less space
B. It requires combustion air, a chimney, and fuel storage
C. Individual room temperature control is easily obtained
D. The cost of installation is lower
E. The operation of the heating devices is clean and silent
B. It requires combustion air, a chimney, and fuel storage
- Some of these advantages of electricity as a source of heat over other heating systems include the following except:
A. The operation of the heating devices very noisy
B. The equipment requires less space
C. Individual room temperature control is easily obtained
D. The cost of installation is lower
E. No combustion and combustion gases
A. The operation of the heating devices very noisy
- One of the general groups of using electricity for comfort heating is _____ heating.
A. Radiant
B. Direct
C. Hot water
D. Hot air
E. Convectio
B. Direct
- 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.
A. Radiant
B. Steam
C. Hot water
D. Direct
E. Convection
D. Direct
- An example of radiant area heating can be found in:
A. Offices
B. Residences
C. Skating arenas
D. Hotels
E. Hospitals
C. Skating arenas
- A disadvantage of the quartz bulb electric infrared heating element is its:
A. Vibration resistance
B. Response Time (heat up)
C. Impact resistance
D. Thermal shock resistance
E. Wind resistance
C. Impact resistance
- A disadvantage of the quartz tube electric infrared heating element is its:
A. Vibration resistance
B. Impact resistance
C. Response Time (heat up)
D. Thermal shock resistance
E. Wind resistance
B. Impact resistance
- Some of these advantages of electricity as a source of heat over other heating systems include the following except:
A. No combustion and combustion gases
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. The cost of installation is higher
E. The cost of installation is higher
- Some of these advantages of electricity as a source of heat over other heating systems include the following except:
A. No combustion and combustion gases
B. Individual room temperature control is easily obtained
C. The equipment requires more space
D. The cost of installation is lower
E. The operation of the heating devices is clean and silent
C. The equipment requires more space
- The metal sheath electric infrared heating element is a:
A. Tube similar to a fluorescent tube
B. Coiled nickel-chrome element enclosed in an air-filled quartz tube with capped ends
C. Metal tube 9.5 mm (3/8 in) in diameter and up to 198 cm (78 in) in length
D. sealed quartz tube filled with inert gas containing a tungsten filament supported by tantalum spacers
E. Bulb similar to an incandescent light bulb
C. Metal tube 9.5 mm (3/8 in) in diameter and up to 198 cm (78 in) in length
- Wall heaters may be of the _____ type
A. Forced convection
B. Open wire
C. Open ribbon.
D. Tubular-cased wire
E. Conduction
A. Forced convection
- Wall heaters may be of the _____ type
A. Open wire
B. Radiant
C. Open ribbon.
D. Tubular-cased wire
E. Conductio
B. Radiant
- The quartz tube electric infrared heating element is a:
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. sealed quartz tube filled with inert gas containing a tungsten filament supported by tantalum spacers
D. Coiled nickel-chrome element enclosed in an air-filled quartz tube with capped ends
E. Bulb similar to an incandescent light bulb
D. Coiled nickel-chrome element enclosed in an air-filled quartz tube with capped ends
- Infrared heaters send out radiant energy in the form of invisible infrared waves that strike a solid opaque object and converted into:
A. Temperature
B. Heat
C. Pressure
D. Energy
E. Power
B. Heat
