Chapter 6 Warm Air Heating System Equipment Flashcards
1.What is the name given to the furnace type that is used where headroom is limited?
A. Upflow furnace
B. Lowboy furnace
C. Highboy furnace
D. Horizontal flow furnace
E. Downflow furnace
B. Lowboy furnace
- Since the temperature of the flue gases of high efficiency furnaces drops below the _____ in the secondary exchanger, condensation of the water vapor takes place.
A. Flash point
B. Dew point
C. Fire point
D. Auto ignition
E. Combustion temperature
B. Dew point
- By passing the combustion gases through a secondary exchanger more heat is transferred to the air so the temperature of the gases drop to about:
A. 65°C (150°F)
B. 100°C (212°F)
C. 50°C (122°F)
D. 150°C (300°F)
E. 230°C (450°F)
A. 65°C (150°F)
- The Unit heater, Floor furnace and Wall furnace are some of the commonly used:
A. Stream boilers
B. Unit heaters
C. Space heaters
D. Duct furnaces
E. Hot water heaters
C. Space heaters
- One of the advantages of a forced warm air heating system is:
A. Temperature distribution is not uniform
B. The ducts can not be enclosed within walls and ceilings
C. The furnace may be located in any part of the building
D. The air can not be cleaned by filters
E. The air can not be humidified
C. The furnace may be located in any part of the building
- A warm air heating system consists of a centrally located heating furnace or heat exchanger an all except:
A. A circulating pump
B. A supply duct system
C. A return duct system
D. Supply outlets
E. Return grilles
A. A circulating pump
- One of the disadvantages of a forced warm air heating system is:
A. A more uniform temperature distribution can be obtained
B. The air ducts are comparatively larger and are much more difficult to enclose than steam or hot water piping
C. The furnace may be located in any part of the building
D. The air may be cleaned by filters
E. The air can be humidified
B. The air ducts are comparatively larger and are much more difficult to enclose than steam or hot water piping
- A furnace equipped with a heat exchanger having S-shaped flue gas channels allows the flue gases to follow a long path through the exchanger and scrub the surfaces intimately this reduces the exit temperature to about:
A. 100°C (212°F)
B. 300°C (570°F)
C. 365°C (690°F)
D. 230°C (450°F)
E. 150°C (300°F)
E. 150°C (300°F)
- One of the advantages of a forced warm air heating system is:
A. Temperature distribution is not uniform
B. The ducts can not be enclosed within walls and ceilings
C. The furnace must be located on the same floor
D. The air may be cleaned by filters.
E. The air can not be humidified
D. The air may be cleaned by filters.
- One of the advantages of a forced warm air heating system is:
A. Temperature distribution is not uniform
B. The ducts can not be enclosed within walls and ceilings
C. The furnace must be located on the same floor
D. The air can not be cleaned by filters
E. The air can be humidified
E. The air can be humidified
- The Unit heater, Floor furnace and Wall furnace are some of the commonly used:
A. Stream boilers
B. Unit heaters
C. Space heaters
D. Duct furnaces
E. Hot water heaters
C. Space heaters
- In larger buildings heated solely by a warm air system several _____ furnaces are often used instead of one centrally located warm air furnace.
A. Lowboy
B. Horizontal
C. Duct
D. Vertical
E. Highboy
C. Duct
- The rooftop heating unit is basically a _____ air heater mounted on the roof.
A. Lowboy
B. Vertical
C. Duct
D. Horizontal
E. Highboy
D. Horizontal
- One development in high efficiency warm air furnaces is the pulse combustion condensing furnace where the gases give up more heat and cool down to:
A. 65°C (150°F)
B. 100°C (212°F)
C. 38°C (100°F)
D. 150°C (300°F)
E. 50°C (122°F)
C. 38°C (100°F)
- The low-capacity unit heater is usually not equipped with a/an:
A. Blower
B. Filter
C. Fan
D. Duct system
E. Combustion chamber
B. Filter
