A 4-ton air-conditioning system that requires an input power of 5 kW would have an energy efficiency ratio of ____________________.

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


9.6

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? In profile extrusion,to produce exact cross-sectional dimensions after the extrudate has cooled, allowances must be made in the ____ design.    

A. ?barrel B. ?screw C. ?blower D. ?orifice

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What metal is one of the most common metals, light weight, corrosion resistant, and can be used instead of steel because

it is so strong?

What will be an ideal response?

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The circuit conductors between the service equipment and the final branch circuit overcurrent protection device is a(n) __________.

a. open circuit b. branch circuit c. feeder circuit d. service conductor

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What is the purpose of the discharge line check valve?

A. To restrict the flow of refrigerant in the discharge line. B. To prevent the migration of liquid refrigerant back into the compressor in the heat mode. C. To prevent the migration of liquid refrigerant back into the compressor in the cool mode. D. To prevent the migration of liquid refrigerant back into the compressor in the off mode.

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