Which of the following conditions is NOT considered when selecting a CPR valve?

A) Refrigerant
B) Humidification capacity of the system
C) Pressure drop across the valve at design load conditions
D) Design suction pressure of the system


B

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There is no place on the jobsite for ___________________________ as it can lead to serious injuries.

A. bantering B. horseplay C. teasing D. laughing

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The diac operates similar to two zener diodes placed back-to-back in series.

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

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In a 555 timer, if pin #____ is connected to Vcc through a variable resistor, the on time becomes longer.

a. 5 b. 6 c. 7 d. 8

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The indicated horsepower is 75, but only 65 horsepower is delivered at the driving wheels. What is the mechanical efficiency? Express the answer to the nearest whole percent.

A. 68% B. 70% C. 75% D. 87%

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