The __________ type of flow meter is the most common type of meter to measure the volume of fluid that flows.
A. differential pressure
B. positive displacement
C. velocity
Answer: A
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The direction of rotation of a DC motor is determined by facing the commutator end of the motor, which is generally the ____ of the motor.
a. front b. rear c. top d. bottom
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Fuel cells generate electricity at efficiencies of 40 percent and ____ with cogeneration systems that use the excess heat.
a. 50 percent b. 65 percent c. 80 percent d. 95 percent
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The paste command normally sends its output to ____.
A. stdout B. null C. stderr D. the file indicated as an argument
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An HVACR technician takes a reading of 25 in Hg. Which type of gauge is he using?
A) It is impossible to tell. B) He is using a manometer. C) He is using a compound gauge. D) He is using a high-pressure gauge.
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