自考10012轮机英语(二)模拟试题10

试题数量：51道
免费次数：登录后，试做1次
练习次数：183次
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试卷简介

该试卷共包含51道试题，试题类型如下:

单选题

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1、[单选题]On modern ships, centrifugal pump with a self-primer has replaced reciprocating pump as bilge pump because .
- A.centrifugal pump is cheaper than reciprocating pump
- B. the size of centrifugal pump with same capacity is smaller than that of reciprocating pump
- C. centrifugal pump makes maintenance easier than reciprocating pump does
- D. all of the above
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2、[单选题]Which cause of following will not lead to refrigeration plant short-cycle?
- A.lack of refrigerant
- B. refrigerant with much water
- C. set defectively low pressure relay
- D. no cooling water
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3、[单选题]To receive oil residues from the purification of fuel and lubricating oils in the machinery spaces, what kind of tank(s) should be provided on board?
- A.bilge tank
- B. sludge tank
- C. overflow tank
- D. oil collecting tank
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4、[单选题]The oil discharge monitoring system in the oil tanker vessels is used for detecting the amount of oil discharged overboard to ensure that it does not exceed .
- A.15 liters/ nautical mile
- B. 30 liters/ nautical mile
- C. 60 liters/ nautical mile
- D. 100 liters/ nautical mile
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5、[单选题]Which of following functions is not one of the functions of air conditioner?
- A.refreshing the air
- B. making person upset
- C. adjusting the air humidity
- D. adjusting the air temperature
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6、[单选题]Which of the following statements is not true concerning symptom of a fire in the scavenge air box?
- A.an increase in the exhaust temperature of the affected cylinder
- B. the turbocharger may surge
- C. the explosion pressure in all cylinders will rise violently
- D. smoke from the turbocharger air inlet filter will be seen
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7、[单选题]What type of electric motor is most commonly used on board ship?
- A.non-synchronous electric motor
- B. synchronous electric motor
- C. fully enclosed electric motor
- D. watertight electric motor
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8、[单选题]According to the principle of four stroke diesel engine, what is the number of its efficient work stroke per revolution?
- A.1/2
- B. 1
- C. 2
- D. 3
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9、[单选题]What is head tank in the closed cooling water system used for?
- A.for the release of air from the cooling water
- B. providing expansion room for heated cooling water
- C. a place for implementing water and water treatment agent
- D. all of the above
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10、[单选题]The function of synchronous compensating machine is to .
- A.improve power factor
- B. reduce voltage oscillation
- C. increase the insulation of circuits
- D. eliminate regenerated magnetic fields
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11、[单选题]A few spots of turbocharger can be caused by ①crash stop of engine; ②rapid increased of engine speed.
- A.① only is correct
- B. ② only is correct
- C. both ① and ②are correct
- D. neither ① or ② correct
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12、[单选题]With one or more cylinders out of operation, the engine speed must be reduced because .
- A.in such cases, the air supply is no longer optimal, the thermal load will be higher
- B. governor hunting will occur
- C. torsional vibrations as other mechanical vibrations may occur
- D. all of the above are correct
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13、[单选题]The nameplate of an AC non-synchronous motor shows that running speed is 1460r/minfrequency 50HzYou can infer that the number of magnetic poles is .
- A.2
- B. 4
- C. 6
- D. 8
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14、[单选题]“380V/220V Y/△” noted on the nameplate of a non-synchronous motor means that .
- A.the armature terminals of the motor should be connected in star formation when voltage of power supply is 380
- B. the armature terminals of the motor should be connected in star formation when voltage of power supply is 220
- C. both A and B are correct
- D. the armature terminals of the motor should be connected in reverse ways of A and B
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15、[单选题]The initial voltage of self-excitation generator set up by .
- A.residual magnetism
- B. voltage regulator
- C. electrical current for excitation
- D. the other running generator
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16、[单选题]Which of the following equipment is not pollution prevention equipment?
- A.oily water separator
- B. sewage treatment plant
- C. fuel oil separator
- D. incinerator
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17、[单选题]The DC excitation to the field of brushless synchronous is generally produced by .
- A.an exciter driven by the same shaft with the generator
- B. an exciter driven by external prime mover
- C. generator itself
- D. either A and B
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18、[单选题]With reference to a two ram actuating mechanism, which one of the following statement is false?
- A.The rams work inside cylinders
- B. The cylinders have glands sealing their open ends
- C. The rams are connected to a cross-head
- D. The cross-head is mounted on the rudder stock
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