When a chiller using a low-pressure refrigerant is operating, the low pressure side of the system ____.

A. always shows a positive pressure
B. is always in a vacuum
C. contains a mixture of oil and air
D. rejects oxygen and moisture


Answer: B

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Indicate whether the statement is true or false.

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Direct expansion evaporators have ____.

A. expansion joints between sections of the evaporator B. an established superheat at the outlet of the evaporator C. subcooling at the outlet of the evaporator D. an established superheat at the inlet of the evaporator

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Where is the best place to connect a vacuum gauge?

What will be an ideal response?

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Which of the following quantitative values are used to indicate level?

A. height B. percentage C. volume D. weight E. all of the above

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