Which of the following statements about trimming insulation is true?

a. Trimming insulation reduces its effectiveness.
b. Insulation is applied to a pipe first, then to an elbow or tee.
c. A vapor retarder should be applied under the insulation where it fits against fittings.
d. Insulation should be removed in layers until you have achieved a snug fit.


d. Insulation should be removed in layers until you have achieved a snug fit.

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Which of these ATC output devices provides a feedback signal to the electronic control module (ECM)?

A) Mode air door motor B) Blend door actuator C) Air inlet door vacuum motor D) Blower motor control

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Continuous cropping is the planned sequence of different crops grown over years on the same land

Indicate whether the statement is true or false

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What is the cause of water hammer?

What will be an ideal response?

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Hot-surface ignition units:

A) Operate for only a few minutes per day. B) Are standard ignition systems. C) Substantially increase an electric bill. D) Are powered by 220 V.

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