The newest HVACR control systems operate by:

A) Turning relay coils on or off to complete circuits.
B) Processing electronic signals with a microprocessor.
C) Providing a modulating air pressure in response to monitored conditions.
D) Providing a varying DC voltage in response to monitored conditions.


B

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a. 14 days b. 21 days c. 28 days d. 30 days

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c. offset section This type of section is used to remove a small portion of an object to expose and clarify an internal feature.

a. broken-out section b. auxiliary section c. revolved section d. removed section

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