輪機(jī)英語單項(xiàng)選擇題每日一練(2020.03.19)

來源：考試資料網(wǎng)

1 When starting a reciprocating pump, the inlet valve should be （）.

2 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.

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3 In heavy marine engine the practice is to drive the engine on（）which has previously been stored in starting air reservoirs.

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4 Which of the following precautions must be taken if an electric immersion heater is used to keep the coolant in a diesel engine warm during the time the engine is secured?（）

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5 The cooling water of the diesel engine should be treated, because it has（）

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