Which of the following would be classified as an azeotropic refrigerant?

A. R-500
B. R-409A
C. R-410A
D. R-123


Answer: A

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One method used by circuit breakers to sense circuit current is to connect a(n) ____ in series with the load.

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Sometimes joists are cut to form an opening. The ends of these joists are supported by ____.

A. headers made of a single member B. headers made of two or more members C. bearing plates made by three members D. sills made of LVL

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Answer the following statement(s) true (T) or false (F)

1. The motor is connected to the power line regardless of which direction it operates. 2. Most reversing controllers only contain mechanical interlocks. 3. Four methods of electrical interlocking are available. 4. One of the methods of electrical interlocking is accomplished with the use of double-acting push buttons. 5. If R coil energizes, all R contacts change position.

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Which of the following statements is true?

I. It is NOT always practical to expect 100% inventory accuracy on all items. II. "C" items should be expected to have a higher inventory accuracy than "A" items. III. Tolerance is the amount of permissible variation between an inventory record and a physical count. A) I, II and III B) I and II only C) I and III only D) II and III only E) I only

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