ESCO Institute Heating Practice Exam-Part 1

Front

A gas furnace is to be installed in a garage. The national standards require that the burners and ignition source must be located ________ above the floor.

Back

18 inches

Front

How does a bi-metal fan switch operate the blower motor on a gas furnace?

Back

temperature on - temperature off

Front

Redundant gas valves used on gas furnaces have:

Back

one gas shut off seat.

Front

Burning one cubic foot of Liquefied Petroleum gas completely will produce approximately ______ BTUs.

Back

2,000-2,500

Front

LP gas has the specific gravity of?

Back

1.5-2.0

Front

What is the purpose of a spoiler screw located on a burner, or adjustable-shutters?

Back

Mix primary air and gas

Front

Furnace limit switches are wired in series with the: low speed fan, high speed fan, gas valve, heat anticipator

Back

gas valve

Front

A technician is using an extension ladder to work on a rooftop unit. The top of the ladder should extend _____ beyond the support point.

Back

3 feet

Front

A technician determines that a natural gas furnace has a defective heat exchanger. The technician should:

Back

inform the home owner and turn the gas off

Front

A natural gas furnace usually requires ____ gas pressure at the manifold and burners.

Back

3.5 in W.C.