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单选题In a closed diesel engine freshwater cooling system, the amount of coolant flowing through the heat exchanger is controlled by the （）.A suction pressure regulatorB thermostatic bypass valveC sea water temperatureD water level in the expansion tank

题目
单选题
In a closed diesel engine freshwater cooling system, the amount of coolant flowing through the heat exchanger is controlled by the （）.
A

suction pressure regulator

B

thermostatic bypass valve

C

sea water temperature

D

water level in the expansion tank

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相似问题和答案

第1题：

High diesel engine cooling water temperatures can be caused by ______.

A.air in the cooling system

B.an overhauled water pump

C.correct amount of coolant

D.no air in the cooling system


正确答案：A

第2题：

单选题
If the coolant temperature of a closed cooling water system for a diesel engine gradually increases, the trouble usually is （）
A

a broken shaft on the freshwater pump

B

an excessive accumulation of scale exchanger

C

an incorrect thermostatic element operating range

D

lube oil in the cooling water


正确答案： D
解析： 暂无解析

第3题：

If the coolant temperature of a closed cooling water system for a diesel enginegradually increases, the trouble usually is( ).

A.a broken shaft on the freshwater pump

B.an excessive accumulation of scale in the heat exchanger

C.an incorrect thermostatic element operating range

D.lube oil in the cooling water


正确答案：B
解析：gradually：逐渐地;accumulation：累积;scale：结垢;thermostatic：恒温的;range：范围
译文：如果一个柴油机内的闭式冷却系统内的冷却介质温度逐渐升高，则通常的原因是热交换器内有过多的积垢。

第4题：

单选题
If the jacket water temperature in an auxiliary diesel engine cooling system is lower than normal, the probable cause is （）
A

air binding of the engine cooling system

B

a cracked water cooled exhaust manifold

C

blockage in the heat exchanger

D

faulty operation of the thermostat


正确答案： B
解析： 暂无解析

第5题：

单选题
The pH value of water in a diesel engine closed cooling water system should be maintained between （）.
A

60 to75

B

80 to 95

C

100 to 115

D

120 to 135


正确答案： D
解析： 暂无解析

第6题：

Prolonged operation of a diesel engine with a closed cooling water system, at lower than normal designed operating temperatures can ______.

A.increase power output

B.decrease lube oil viscosity

C.eliminate fuel knock

D.cause sulfuric acid formation


正确答案：D

第7题：

单选题
Lube oil accumulating in the cooling water system of a diesel engine will result in （）
A

lube cooler failure

B

poor heat transfer

C

mechanical lubricator failure

D

camshaft seizure


正确答案： A
解析： 暂无解析

第8题：

In a diesel engine closed freshwater cooling system, the amount of coolant flowing through the heat exchanger is controlled by the __.

A.suction pressure regulator

B.thermostatic bypass valve

C.sea water temperature

D.water level in the expansion tank


正确答案：B

第9题：

单选题
The device allowing for the change in volume of the cooling water in a propulsion diesel engine closed cooling system is the （）.
A

fresh water expansion tank

B

sea water expansion tank

C

thermostatic expansion valve

D

jacket water cooler accumulator


正确答案： D
解析： 暂无解析

第10题：

单选题
High diesel engine cooling water temperatures can be caused by （）.
A

air in the cooling system

B

an overhauled water pump

C

correct amount of coolant

D

no air in the cooling system


正确答案： C
解析： 暂无解析

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