轮机部三管轮考试题3(轮机英语)
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The primary function of a fuel delivery check valve assembly is to________.
- A.deliver proper fuel quantity to the injection nozzle
- B.provide rapid fuel injection cutoff
- C.control fuel quantity entering the pump body
- D.control fuel pressure delivered to the combustion chamber
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The rate of expansion of heated fuel oil varies with the _____.
- A.conductivity
- B.viscosity
- C.volume
- D.specific gravity
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Which of the two events listed occurs simultaneously in a two-stroke/cycle diesel engine?
- A.Exhaust and scavenging
- B.Scavenging and compression
- C.Ignition and expansion
- D.Exhaust and compression
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Bacteria which live are said to be aerobic.
- A.in the presence of oxygen
- B.without oxygen
- C.in the presence of nutrition
- D.without nutrition
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Many diesel engine exhaust valves are being constructed with hollow stems filled with sodium in order to ___________________.
- A.provide added wear protection against today’s corrosive quality of fuel
- B.increase overall valve strength due to the high gas pressures
- C.assist in dissipating heat due to the extreme operating temperatures
- D.reduce the overall weight of the valve thus helping eliminate valve spring surge and hammering
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About half an hour before the engine is required, cooling water at _____ must be circulated.
- A.more than the working temperature
- B.less than the working temperature
- C.the working temperature
- D.the same as the surrounding temperature
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When the direction handle of telegraph is moved, the relative position of camshaft and crankshaft will be_____ .
- A.changed accordingly
- B.unchanged
- C.positioned ahead
- D.positioned astern
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An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by _____.
- A.restriction in refrigerant piping
- B.air and non-condensable gases in the condenser
- C.water in the refrigerant
- D.flooding back of liquid refrigerant from the evaporator
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Which of the actions listed and instituted on your part will have the greatest lasting effect on the crew with respect to safety?
- A.Posting posters illustrating practices
- B.Showing video tapes of actual accidents
- C.Incorporating safety practices in daily routine
- D.Publishing comprehensive safety rules
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The withdrawing of the cylinder liners, in general, depends on their _____This may amount to approximately 1/120 of the diameter in some engines.
- A.correct maneuvering
- B.wear
- C.working efficiency
- D.maintenance
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