單項(xiàng)選擇題

Which of the listed operating conditions would have the greatest effect on the volumetric efficiency of an operating reciprocating air compressor?（）

A.The density of the air entering the compressor
B.The temperature of the air entering the compressor
C.The designed rotating speed of the compressor
D.A leaking head gasket

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單項(xiàng)選擇題

In order to distribute the side pressures over a wide area of the cylinder walls and liners, which of the listed types of pistons are used in modem low pressure air compressors?（）

A.Differential
B.Trunk
C.Barrel
D.Valve-in-head

單項(xiàng)選擇題

A cracked diaphragm in a thermostatic expansion valve will cause the valve to （）.

A.return to a neutral position
B.flood the evaporator
C.open
D.close

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Which of the listed operating conditions would have the greatest effect on the volumetric efficiency of an operating reciprocating air compressor?（）

你可能感興趣的試題

In order to distribute the side pressures over a wide area of the cylinder walls and liners, which of the listed types of pistons are used in modem low pressure air compressors?（）

A cracked diaphragm in a thermostatic expansion valve will cause the valve to （）.