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【单选题】

If a large difference exists between the compressor discharge pressure and the pressure corresponding to the existing condensing temperature in a refrigeration system, you should（）.

A、increase the flow of the cooling water through the condenser

B、adjust the high pressure cutout to maintain the desired pressure

C、open the hot gas bypass temporarily to reduce capacity

D、purge non-condensable gases to reduce the excess pressure

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更多“If a large difference exists between the compressor discharge pressure and the pressure corresponding to the existing condensing temperature in a refrigeration system, you should（）.”相关的问题

第1题

[单选题] As to the bearing, of the following, which statement is not true?（）

A、ff overheat is found, the engine must be stopped for inspection B、Much heat of the crankcase door indicates that the bearing is overheated C、If bearing clearance is too large, knocking will be heard in the crankcase D、If bearing clearance is too large or too small, the white metal may be melted

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第2题

[单选题] If the capacity of the refrigeration compressor is too large, the saturation temperature will （）.

A、rise B、fall C、be maintained constant D、None of the above

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第3题

[单选题] If the metacenteroic height is large,a floating vessel will（）.

A、be tender B、have a slow and easy motion C、be stiff D、have a tendency to yaw

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第4题

[] If the metacentric height is large，a floating vessel will（）.

A、A.be tender B、B.have a slow and easy motion C、C.be stiff D、D.have a tendency to yaw

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第5题

[单选题] Eggs, though rich in nourishments, have（）of fat.

A、a large number B、the large number C、a large amount D、the large amount

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第6题

[单选题] Eggs, though rich in nourishments, have（）of fat

A、a large number B、the large number C、a large amount D、the large amount

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第7题

[单选题] Many businesses ship their products by rail if they are shipping long distance because it can be（）to ship in large quantities by rail than by truck.

A、more expensive B、cheaper C、faster D、safer

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第8题

[单选题] Many businesses ship their products by rail if they are shipping long distance because it can be（）to ship in large quantities by rail than by truck.

A、more expensive B、cheaper C、faster D、safer

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第9题

[单选题] If you find an extremely large refrigerant leak while using a halide torch, your flame will（）

A、change from blue to orange B、‘flare up’ and remain lighted C、probably go out D、stay blue

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第10题

[单选题] In the daytime，you see a large sailing vessel on the beam. You know that she is also propelled by machinery if she shows（）.

A、a basket B、a black ball C、a black cone D、two black cones

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