Air filters should be placed in the __________ of the forced air system.

A. return
B. supply
C. either a or b
D. neither a nor b


Answer: A

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Electric power is generated by ____, which use the energy of falling water to turn a generator and produce electricity.

A. nuclear power plants B. hydroelectric generation plants C. fossil fuel powered generators D. on-site powered generators

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Which refrigerant oil is not characterized as hygroscopic?

a. POE b. PVE c. PAG d. Alkylbenzene

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Classical Greek tragedy likely disappeared after the Peloponnesian War because of

a. a lack of Athenian interest in examining themselves or their troubled times. b. Philip of Macedon’s decree banning the performance of tragedies in Athens. c. the condemnation of tragic plays by philosophers such as Socrates. d. the rising popularity of comedies like the plays of Aristophanes.

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Technician A says that a no range shift condition could be caused by cracked slave valve piston. Technician B says that to repair a cracked range shift piston, the compound (auxiliary section) must be removed. Who is correct?

A. Technician A only B. Technician B only C. Both A and B D. Neither A nor B

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