Oil pressure in the lubrication system is （） the static sea water head to ensure that sea water （） the stem-tube.

A、A.lower than；can lubricate

B、B.lower than；can cool

C、C.higher than；can enter

D、D.higher than ；cannot enter

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第1题

[单选题] Which of the following statements is true concerning an oil cooler?（）

A、The oil temperature is less than the cooling water temperature B、The oil pressure is less than the cooling water pressure C、The oil pressure is greater than the cooling water pressure D、The oil flow control valve is always installed in the oil input line

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第2题

[单选题] When lighting off an auxiliary boiler, which of the problems listed could cause the burners to sputter?（）

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第3题

[单选题] Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）

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第4题

[] Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）

A、A.double bottom fuel oil tank temperature B、B.heater supply steam flow C、C.pressure of the fuel supplied to the burners D、D.attemperator steam flow in the heater discharge circuit

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第5题

[单选题] Worn main bearings in a diesel engine can result in （）

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第6题

[单选题] The fourth engineer accompanied by the workers on oil barge measures the oil levels, temperature and （） in the tanks.

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第7题

[单选题] In an oil cooler circulated by sea water, the oil is at a larger pressure, the result being that any leak in the cooler will mean a loss of （）.

A、oil B、sea water C、refrigerant D、fresh water