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
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Power Engineering Chapter 100
- A type of directly fired space heater is
- In a fin-coil heat exchanger the primary source of heat for the exchanger is
- The power supply for an electric resistance coil furnace is
- One of the biggest heat losses in the warm air furnaces and space heaters is:
- In a warm air heating system, the cold air return registers are located:
- High efficiency furnaces and heaters range in annual fuel utilization efficiency (AFUE) from:
- One of the biggest heat losses in the warm air furnaces and space heaters is:
- 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:
- Lowboy furnaces are just over _____ in height:
- In a pulse combination furnace, the stated efficiency is:
- 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:
- In a fin-coil heat exchanger, the heat exchanger is
- One of the disadvantages of forced warm air heating systems is the:
- The advantage of having duct furnaces instead of a large central furnace is:
- In a high efficiency furnace or heater the temperature of the flue gases are _____ in the secondary heat exchanger.
- One of the advantages a forced warm air heating systems has over the steam or hot water heating systems is: