Book 2: 1-06 - "Warm Air Heating System Equipment"

Question 1

One of the disadvantages of a forced warm air heating system is:
Select one:

A. The air can be humidified

B. They can be quite noisy if not properly designed

C. A more uniform temperature distribution can be obtained

D. The air may be cleaned by filters

E. The ducts can be enclosed within walls and ceilings

Answer 1

B. They can be quite noisy if not properly designed

Question 2

The most efficient of the heater types is the:
Select one:

A. Directly fired oil furnace

B. Hot water boiler system

C. Directly fired oil furnace

D. Electric furnace

E. Steam boiler system

Answer 2

D. Electric furnace

Question 3

One of the advantages of a forced warm air heating system is:
Select one:

A. The furnace must be located on the same floor

B. Temperature distribution is not uniform

C. The air can not be cleaned by filters

D. The air can be humidified

E. The ducts can not be enclosed within walls and ceilings

Answer 3

D. The air can be humidified

Question 4

One of the advantages of a forced warm air heating system is:
Select one:

A. The air can not be cleaned by filters

B. The furnace must be located on the same floor

C. The ducts can be enclosed within walls and ceilings

D. The air can not be humidified

E. Temperature distribution is not uniform

Answer 4

C. The ducts can be enclosed within walls and ceilings

Question 5

One of the disadvantages of a forced warm air heating system is:
Select one:

A. The furnace may be located in any part of the building

B. The air can be humidified

C. A more uniform temperature distribution can be obtained

D. The air may be cleaned by filters

E. The air ducts are comparatively larger and are much more difficult to enclose than steam or hot water piping

Answer 5

E. The air ducts are comparatively larger and are much more difficult to enclose than steam or hot water piping

Question 6

What is the name given to the furnace type that has the return air enter the bottom and the supply air leave the top of the system?
Select one:

A. Horizontal flow furnace

B. Lowboy furnace

C. Highboy furnace

D. Downflow furnace

E. Upflow furnace

Answer 6

E. Upflow furnace

Question 7

The term space heater is generally applied to a fired heater which is installed in the space to be heated and heats the air directly without the use of:
Select one:

A. Steam or water

B. A combustion chamber

C. An open flame

D. A blower

E. Any ducting

Answer 7

E. Any ducting

Question 8

What is the name given to the furnace type that has the return air enter the top and the supply air leave the bottom of the system?
Select one:

A. Upflow furnace

B. Downflow furnace

C. Horizontal flow furnace

D. Lowboy furnace

E. Highboy furnace

Answer 8

B. Downflow furnace

Question 9

The low-capacity unit heater is usually not equipped with a/an:
Select one:

A. Blower

B. Filter

C. Fan

D. Combustion chamber

E. Duct system

Answer 9

B. Filter

Question 10

The Unit heater, Floor furnace and Wall furnace are some of the commonly used:
Select one:

A. Stream boilers

B. Unit heaters

C. Hot water heaters

D. Duct furnaces

E. Space heaters

Answer 10

E. Space heaters

Question 11

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:
Select one:

A. 100°C (212°F)

B. 365°C (690°F)

C. 150°C (300°F)

D. 300°C (570°F)

E. 230°C (450°F)

Answer 11

C. 150°C (300°F)

Question 12

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:
Select one:

A. 38°C (100°F)

B. 50°C (122°F)

C. 100°C (212°F)

D. 65°C (150°F)

E. 150°C (300°F)

Answer 12

A. 38°C (100°F)

Question 13

One of the advantages of a forced warm air heating system is:
Select one:

A. The furnace must be located on the same floor

B. The air can not be humidified

C. The air can not be cleaned by filters

D. A more uniform temperature distribution can be obtained

E. The ducts can not be enclosed within walls and ceilings

Answer 13

D. A more uniform temperature distribution can be obtained

Question 14

The flue gas temperature on the heat exchanger exit of an older warm air furnace is about:
Select one:

A. 300°C (570°F)

B. 230°C (450°F)

C. 365°C (690°F)

D. 100°C (212°F)

E. 150°C (300°F)

Answer 14

B. 230°C (450°F)

Question 15

One of the advantages of a forced warm air heating system is:
Select one:

A. The air can not be humidified

B. The air can not be cleaned by filters

C. The ducts can not be enclosed within walls and ceilings

D. The furnace may be located in any part of the building

E. Temperature distribution is not uniform

Answer 15

D. The furnace may be located in any part of the building

Question 16

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.
Select one:

A. Fire point

B. Dew point

C. Combustion temperature

D. Flash point

E. Auto ignition

Answer 16

B. Dew point

Question 17

In larger buildings heated solely by a warm air system several _____ furnaces are often used instead of one centrally located warm air furnace.
Select one:

A. Duct

B. Lowboy

C. Horizontal

D. Highboy

E. Vertical

Answer 17

A. Duct

Question 18

One of the advantages of a forced warm air heating system is:
Select one:

A. The air can not be humidified

B. The air may be cleaned by filters.

C. The ducts can not be enclosed within walls and ceilings

D. Temperature distribution is not uniform

E. The furnace must be located on the same floor

Answer 18

B. The air may be cleaned by filters.

Question 19

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:
Select one:

A. 65°C (150°F)

B. 100°C (212°F)

C. 50°C (122°F)

D. 230°C (450°F)

E. 150°C (300°F)

Answer 19

A. 65°C (150°F)

Question 20

A warm air heating system consists of a centrally located heating furnace or heat exchanger an(d*) all except:
Select one:

A. Supply outlets

B. Return grilles

C. A return duct system

D. A circulating pump

E. A supply duct system

*Missing text from question replaced

Answer 20

D. A circulating pump