____ are caused by gasket failures that prevent the ventilation system from operating as designed.

A. Evaporative leaks
B. Oil leaks
C. Vacuum hose leaks
D. Manifold leaks


Answer: B

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Sheet thickness may be given as a fraction of an inch (usually as a decimal fraction) or as a ____ number.

A. gauge B. sheet C. plate D. band

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The Insulated Gate Bipolar Transistor (IGBT) is a current controlled device, not a voltage controlled device.

Answer the following statement true (T) or false (F)

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Overdefrosting is caused by:

A) A defrost termination failure. B) A compressor failure. C) A condenser fan failure. D) A defrost initiation failure.

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What type of defrost do geothermal systems use?

A) traditional time-temperature defrost B) they do not need defrosting C) adaptive defrost using the air temperature D) adaptive defrost using the ground temperature

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