What is puff-back?
What will be an ideal response?
Usually the oil-air mixture is incorrect because of the blocked combustion chamber, leading to delayed ignition. When the oil does ignite the small explosion produces a puff of soot and unburned oil that forces its way out into the area around the furnace.
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FIC-202 is typically set at :
a. 125 GPM b. 50 GPH c. 225 GPS d. 225 GPM
? Identify and state the historical significance of F. Scott Fitzgerald.
What will be an ideal response?
Which is NOT part of a rear air conditioning system?
A) Rear evaporator B) Rear AC compressor C) Rear blower motor D) Rear heater core
What allows the safety relay to operate?
A) heating up the heat exchanger B) increasing the current flow C) decreasing the current flow D) shutting off the burner