The substance being cooled by a refrigeration system is called:

A) The product. B) The refrigerant.
C) The source. D) The cooling medium.


A

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One advantage of DC electric braking is that _____.

a. it can be used to hold a suspended load b. solenoid-operated friction brakes are engaged c. the motor is stopped very gradually d. the motor can be stopped without having to use brake linings or drums

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A quartz crystal having a thickness of 2 mm and voltage sensitivity of 0.055 Vm/N is subjected to a stress of 1.5 Mn/sq.m. Calculate voltage output and charge sensitivity.

What will be an ideal response?

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Technician A says that the four strokes of the 4-stroke cycle are intake, compression, power, and exhaust. Technician B says that most engines rotate clockwise as viewed from the rear (flywheel) end of the engine. Which technician is correct?

A) Technician A B) Technician B C) Both technicians D) Neither technician

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Technician A says the output of the air pump is directed to the area between the reduction and the oxidation catalyst. Technician B says the output of the air pump is directed to the exhaust manifolds just behind the exhaust valves. Who is correct?

A. A only B. B only C. both A and B D. neither A nor B

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