What is the purpose of the low ambient control on a commercial air conditioner?

A) To permit the unit to cool even at low ambient temperatures
B) To cycle the air conditioning system based on ambient temperature
C) To energize heat strips to control the ambient temperature
D) To prevent the system from operating at low ambient temperatures


A

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Which type of insulation is produced by combining certain chemicals that react together in appropriate forms and releases a vaporous, bubbly product that takes the shape of the form?

a. formed fibrous b. blanket c. foam d. corrugated

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Mechanical dial instruments are direct reading and do not require interpretation like a vernier

Indicate whether the statement is true or false

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The space left between the piston and the valve plate of a reciprocating compressor when the piston is at the top of the cylinder is called:

A) The bore. B) The mechanical allowance. C) The clearance volume. D) The stroke.

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A downside of using deep-cycle batteries is

A) they are inefficient B) they are expensive C) they require regular maintenance D) all of the above

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