The driver must be able to see a low air pressure warning which comes on before pressure in the service air tanks fall below _____ psi.

a. 60
b. 80
c. 40


a. 60

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Why are two sets of contacts (one set normally open and one set normally closed) needed on an indoor fan relay?

a. To allow high-speed operation in heating. b. To allow low-speed operation in cooling. c. To allow high-speed operation after a time delay. d. To ensure only one motor speed winding is energized at a time.

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Which of the following is a possible long-term effect of exposure to indoor air pollutants?

a. Headache b. Cancer c. Eye irritation d. Drowsiness

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Rotating pastures will help break the internal parasite cycle

Indicate whether the statement is true or false.

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Describe the operation of the clutch, giving information that explains how the clutch releases and energizes.

What will be an ideal response?

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