High temperature refrigeration is that produced by ____.
A. heat from a furnace
B. an air-conditioning system
C. the vegetable cooling system of a refrigerator
D. the freezer section of a refrigerator
Answer: B
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Which of the following describes the role of a rectifier in an alternator?
A. AC is rectified to DC B. DC is rectified to AC C. voltage is rectified to current D. current is rectified to voltage
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The substance used to compare the specific gravity of liquids is:
A) Ozone. B) Air. C) Water. D) Carbon dioxide.
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A driver can detect fluid leaks using the sense of
A. smell B. hearing C. sight D. feeling
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What is a gas that a plumber is likely to encounter in a manhole?
A. butane B. methane C. carbon monoxide D. chlorine
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