A type of directly fired space heater is

A type of directly fired space heater is

a) a unit heater
b) a floor furnace
c) a wall furnace
d) all of the above
e) none of the above





Answer: D

In a fin-coil heat exchanger the primary source of heat for the exchanger is

In a fin-coil heat exchanger the primary source of heat for the exchanger is

a) steam or hot water
b) gas
c) oil
d) solar
e) radiant





Answer: A

The power supply for an electric resistance coil furnace is

The power supply for an electric resistance coil furnace is

a) 60 V
b) 120 V
c) 240 V
d) 220 V
e) 480 V




Answer: C

One of the biggest heat losses in the warm air furnaces and space heaters is:

One of the biggest heat losses in the warm air furnaces and space heaters is:

a. In the combustion chamber
b. The flue gases
c. Poor combustion design
d. High combustion air temperature
e. Poor air/fuel mixtures






Answer: B

In a warm air heating system, the cold air return registers are located:

In a warm air heating system, the cold air return registers are located:

a. In exterior walls
b. In interior locations
c. Under windows
d. In floors
e. In ceilings





Answer: B

In high efficiency furnaces, if the temperature of the flue gas drops below 65°C, the:

In high efficiency furnaces, if the temperature of the flue gas drops below 65°C, the:

a. Flue gas will condense
b. Water vapour will condense out of the flue gas
c. Furnace burner will shut down
d. Furnace burner will start up
e. Furnace will cycle off





Answer: B

High efficiency furnaces and heaters range in annual fuel utilization efficiency (AFUE) from:

High efficiency furnaces and heaters range in annual fuel utilization efficiency (AFUE) from:

a. 94 - 98%
b. 80 - 98%
c. 70 - 75%
d. 60 - 70%
e. 50 - 60%




Answer: B

One of the biggest heat losses in the warm air furnaces and space heaters is:

One of the biggest heat losses in the warm air furnaces and space heaters is:

a. In the combustion chamber
b. The flue gases
c. Poor combustion design
d. High combustion air temperature
e. Poor air/fuel mixtures





Answer: B

A fired heater which is installed on the location where the heat is needed and heats the air directly without the use of any ducting is called a:

A fired heater which is installed on the location where the heat is needed and heats the air directly without the use of any ducting is called a:

a. Unit heater
b. Unit ventilator
c. Convector
d. Fin-coil heat exchanger
e. Rooftop unit





Answer: A

Lowboy furnaces are just over _____ in height:

Lowboy furnaces are just over _____ in height:

a. 1.0 m
b. 0.8 m
c. 1.4 m
d. 1.6 m
e. 1.2 m






Answer: E

In a pulse combination furnace, the stated efficiency is:

In a pulse combination furnace, the stated efficiency is:

a. 94 - 98%
b. 80 - 95%
c. 70 - 75%
d. 60 - 70%
e. 50 - 60%

Answer: A

Forced warm air heating systems, as compared to steam or hot water heating systems, are used more extensively to heat residences, small commercial buildings, shops, and stores since:

Forced warm air heating systems, as compared to steam or hot water heating systems, are used more extensively to heat residences, small commercial buildings, shops, and stores since:

a. They are very portable
b. There is no maintenance required
c. They do not require duct work
d. Installation and maintenance costs are lower
e. They are very quiet in operation





Answer: D

In a fin-coil heat exchanger, the heat exchanger is

In a fin-coil heat exchanger, the heat exchanger is

a. a steam or hot water coil
b. Gas-fired
c. Oil-fired
d. Electric
e. Direct-fired





Answer: A

One of the disadvantages of forced warm air heating systems is the:

One of the disadvantages of forced warm air heating systems is the:

a. Installation and maintenance costs are higher than steam heating systems
b. Air contains too much moisture
c. System can be quite noisy as compared to gravity warm air heating systems
d. Poor air circulation
e. High cost for the system due to specialty equipment required




Answer: C

The advantage of having duct furnaces instead of a large central furnace is:

The advantage of having duct furnaces instead of a large central furnace is:

a. Less initial cost
b. Easier installation
c. Better control of heat in each zone of the building
d. Requires less space
e. Lower maintenance costs





Answer: C

In a high efficiency furnace or heater the temperature of the flue gases are _____ in the secondary heat exchanger.

In a high efficiency furnace or heater the temperature of the flue gases are _____ in the secondary heat exchanger.

a. Very high
b. Very low
c. Above the dew point
d. Below the dew point
e. At the dew point





Answer: D

One of the advantages a forced warm air heating systems has over the steam or hot water heating systems is:

One of the advantages a forced warm air heating systems has over the steam or hot water heating systems is:

a. Its ease of installation of duct works
b. That controlled amounts of ventilation air can be admitted
c. The systems are maintenance free
d. The systems are virtually noise free
e. The systems do not require electricity





Answer: B