輪機(jī)英語章節(jié)練習(xí)(2020.03.19)

來源：考試資料網(wǎng)

1 （） is not installed on the main switchboar.

2 Before liquid can flow into a pump, the air in the suction line must be （） sufficiently to cause the liquid to flow into the suction chamber.

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3 The use of sinking and dispersing agents for the removal of surface oil is （）.

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4 In the refrigeration system, a shortage of refrigerant is indicated by （）.

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5 Voltage generated by most AC generators is fed from the machine to the bus by means of（）.

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6 Emulsion oils and sodium nitrite are both approved additives, but the latter cannot be used if any pipes are （） or if any soldered joints exit.

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7 In the two stroke diesel engine, it is designed so that the oil impingement is timed to proceed only on the piston ring belt during（）

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8 The fire drill must, as far as practicable, be conducted if （）.

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9 When a ship is entering to narrow waterway and the fuel feeding of the main engine is keeping unchanged, which of the following is the wrong conclusion?（）

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10 The four basic components of a fire are fuel, heat, oxygen and a chain reactionWhich of the following statements best describes what must be eliminated to extinguish a fire?（）

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