In a general oil cooler circulated by sea water, the oil is at a higher pressure, the result being that any leak in the cooler will mean a loss of （）.

A、oil

B、sea water

C、air

D、fresh water

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第1题

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第2题

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第3题

[单选题] Hydraulic control check value is generally used to （） in the marine hydraulic mechanism.

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第4题

[单选题] The use of sinking and dispersing agents for the removal of surface oil is （）.

A、the most common method used in the United States B、too expensive for common use C、generally safe to sea life D、generally harmful to sea life

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第5题

[单选题] In general, the oil mist detectors include a built-in heating unit and a compact plug for electrical connectionThe function of heating unit is to （）

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