Constant superheat is maintained at the evaporator outlet of a refrigeration coil by a（）

A、solenoid valve

B、low pressure cutout switch

C、king valve

D、thermal expansion valve

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更多“Constant superheat is maintained at the evaporator outlet of a refrigeration coil by a（）”相关的问题

第1题

[] Modern marine diesel engines using mechanical fuel injection, operate on a combustion cycle which is（）

A、A.a combination of constant volume and constant pressure B、B.a combination of constant temperature and constant pressure C、C.entirely constant pressure D、D.entirely constant volume

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第2题

[单选题] Modern marine diesel engines equipped with mechanical fuel injection operate on a combustion phase within the cycle which is（）

A、entirely constant pressure B、entirely constant temperature C、a combination of constant volume and constant pressure D、a combination of constant temperature and constant pressure

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第3题

[单选题] Sweating of the refrigeration system compressor crankcase is caused by （）.

A、too much superheat B、insufficient superheat C、suction pressure too low D、excessive refrigerant returning to the compressor

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第4题

[单选题] （） is a precaution which contributes to avoiding trouble under normal operating conditions.

A、Constant inspection B、Keeping constant load C、Remaining constant temperature D、varying speed

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第5题

[单选题] （） is a precaution which contributes to avoiding trouble under normal operating conditions.

A、Constant inspection B、Keeping constant load C、Remaining constant temperature D、Varying speed

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第6题

[单选题] The expansion valve on a Freon system controls the （）.

A、superheat of the gas leaving the compressor B、back pressure in the evaporator C、temperature of the icebox D、superheat of the gas leaving the evaporator

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第7题

[单选题] The thermal expansion valve responds to the（）

A、amount of superheat in the vapor leaving the coil B、amount of superheat in the liquid C、temperature in the evaporator coils D、pressure in the evaporator coils