In most 24 V AC low-voltage systems the red wire is hot, the yellow wire is the cooling circuit, and the green wire controls the:

A) Compressor. B) Gas valve. C) Heater element. D) Fan circuit.


D

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The range of temperatures within which a zeotropic refrigerant changes state at a given pressure is known as its _____.

a. saturation range b. latent-heat band c. fractionation rate d. temperature glide

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In the accompanying figure, the item identified as A indicates the ____ lines.

A. phantom B. cutting plane C. hidden D. break

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Which type of safety device will keep the electric fuel pump from operating if it is tripped?

A) Antisiphoning valve B) Inertia switch C) Check valve D) Rollover valve

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Digital Signal Processing is the processing of analog signals by conversion to digital form

Indicate whether the statement is true or false

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