In order to maintain a constant outlet water temperature of

题目
单选题
In order to maintain a constant outlet water temperature of 80-85℃ from the engine, a three-way valve is installed()
A

at the jacket cooler outlet to control the flux through the engine

B

at the jacket cooler outlet to control the flux through the cooler

C

at the engine outlet to control the flux through the engine

D

at the engine inlet to control the flux through the engine

参考答案和解析
正确答案: B
解析: 暂无解析
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第1题:

_______can cause oil flow from water outlet of the oil purifier.

A.Oil inlet valve opening too quickly

B.Oil temperature little higher than normal

C.Diameter of gravity disc too small

D.Viscosity of oil little lower than normal


正确答案:A

第2题:

单选题
If the cooling water temperature and the lube oil temperature in a diesel engine are too high, the cause can be ()
A

a dirty lube oil strainer

B

internal water leaks

C

an oil suction line restriction

D

excessive wears of the cooling water pump


正确答案: B
解析: 暂无解析

第3题:

When using a fuel with a higher than normal sulfur content in an auxiliary four stroke diesel engine, you may

A.maintain higher than normal jacket water temperature

B.change the lube oil more frequently than normal

C.maintain a higher air-box temperature than normal

D.maintain a higher air-box pressure than normal


正确答案:B

第4题:

单选题
In order to start a large, low-speed, main propulsion diesel engine on high viscosity fuel after an extended shutdown, the ()
A

fuel must be preheated

B

intake air should be preheated

C

lube oil outlet temperature should be increased 20℃ above normal

D

none of the above


正确答案: B
解析: 暂无解析

第5题:

单选题
The () of the gravity disc is too big It causes oil to flow through the water outletWe changed the disc and no oil is found in the water outlet.
A

gravity

B

diameter

C

circumference

D

cylinder


正确答案: A
解析: 暂无解析

第6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


正确答案:C

第7题:

单选题
For the proper control of the air temperature in an air conditioning system using chilled water circulation, which of the listed conditions should remain constant regardless of load changes?()
A

Chilled water system supply temperature

B

Chilled water system return temperature

C

Compressor discharge temperature

D

Compressor suction pressure


正确答案: D
解析: 暂无解析

第8题:

One of the reasons that causes oil flowed from sludge outlet of a self-cleaning purifier is

A.seal water supply be cut off

B.make-up water supply be cut off

C.oil outlet valve closed or not open sufficiently

D.the flow rate of oil is too much


正确答案:B

第9题:

单选题
()can cause oil flow from water outlet of a separator.
A

Oil inlet valve opening too quickly

B

Oil temperature too high

C

Diameter of gravity disc too small

D

Viscosity of oil too low


正确答案: B
解析: 暂无解析

第10题:

单选题
The temperature differential occurring between the inlet temperature of the fluid to be cooled and the outlet temperature of the cooling medium in a shell-and-tube heat exchanger is greatest in which of the flow designs listed?()
A

Cross

B

Parallel

C

Counter

D

Circular


正确答案: A
解析: 暂无解析

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