The first check when answering a no-heat oil furnace call should be

A) Checking to see if there is oil in the tank and if the oil is clean
B) Checking the output of the ignition transformer
C) Checking the cad cell circuit
D) Checking the fan switch setting


A

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_____ is a form of energy that can produce light, heat, magnetism, and chemical changes

a. Electricity c. Power b. Gas d. Methane

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The resistance of a good cad cell when it is in the dark should be

A) 30 to 1000 ohms B) 1000 to 5000 ohms C) 100,000 ohms or higher D) 5000 to 10000 ohms

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Medium and large commercial buildings typically use

A) low-pressure steam boilers. B) low-pressure hot-water boilers. C) medium- or high-pressure steam boilers. D) medium- or high-pressure hot-water boilers.

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