____ are used in light meters for photographic equipment, instruction detectors, automatic door openers, and various kinds of test equipment to measure light intensity.

A. Light-emitting diodes
B. Solar cells
C. Photodiodes
D. Photo cells


Answer: D

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Some compressor contactors have only one set of contacts instead of two so that ____.

A. power to the compressor can be more easily interrupted B. there will be less contact wear C. the contactor will fit into a smaller space D. a small amount of power can be passed through the motor windings for off-cycle crankcase heat

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How many planetary gearsets are there in an Allison 5-speed hydromechanical transmission?

A. two B. three C. four D. five

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PVC roofing is composed of plastic waterproofing combined with a ____ reinforcement layer.

A. fiber B. metal C. plastic D. rubber

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The suspension system supports the vehicle and helps to provide a smoother ride.

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

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