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单选题
When preparing an engine for water temperature()
A
should be kept at a proper level by a cooler
B
should be raised to about 80℃ by a heater
C
should be raised gradually
D
should be lowered to about 60℃
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thenB
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考题
单选题When preparing an engine for water temperature()A
should be kept at a proper level by a coolerB
should be raised to about 80℃ by a heaterC
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should be lowered to about 60℃
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单选题If an auxiliary diesel engine temperature is higher than normal ,but the thermostat is determined not to be defective you would suspect a /an ()A
cavitation erosion in the water jacketsB
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dirty jacket water coolerD
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考题
单选题On what do you depend having the air cooler of main engine chemically washed?()A
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reduced exhaust temperature in all cylindersC
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考题
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The lube oil viscosity will increase
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单选题What monitoring device best indicates the load being carried by a diesel engine?()A
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Jacket water temperature gaugeC
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单选题When using a fuel with a higher than normal sulfur content in an auxiliary diesel engine, you should()A
maintain higher than normal jacket water temperatureB
change the lube oil more frequently than normalC
maintain a higher air-box temperature than normalD
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单选题The jacket water temperature in a diesel engine closed freshwater cooling system is normally controlled by ()A
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the level of the freshwater expansion tankC
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单选题Which of the following conditions may need to be reduced when operating a large, low speed, main propulsion, diesel engine at low loads?()A
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Control air supply pressureC
Cooling water flow through after-coolersD
Lube oil temperature
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