The refrigerant used in most of today's small air-conditioning systems is ____________________.

Fill in the blank(s) with the appropriate word(s).


R-22

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

1) It is advisable to include employees in the selection of PPE for cold environments because they are more likely to wear PPE they had a voice in choosing. 2) OSHA provides comprehensive standards for preventing both cold and heat-related injuries. 3) The lowest CLO is zero which means the individual would be wearing no clothing.

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The normal position for a suction service valve during normal operation is ____.

A. backseated B. frontseated C. cracked off the back D. midseated

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A wrench with open-end jaws at one end and box-end jaws at the other, both of the same nominal dimension, is known as a _____.

A. linesman wrench B. combination wrench C. spanner wrench D. adjustable wrench

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Heat can be converted directly to electricity with a device called a ____.

A. thermocouple B. photovoltaic cell C. solar cell D. generator

Trades & Technology