海船船员考试轮机部三管轮模拟题3(轮机英语)
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When two oil separators are working in series, they should work with ____.
- A.both as clarifiers
- B.first one as clarifiers, second one as purifier
- C.both as purifiers
- D.first one as purifier, second one as clarifier
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What is the harmful effect of sulfur in a fuel?
- A.It causes excessive smoking and soot at low firing rates
- B.It doesn’t readily burn when combined with oxygen
- C.It clogs fuel oil strainers more often
- D.It forms a corrosive acid when mixed with water or water vapor
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Shaker, circulation and spray are the three general methods used in __________
- A.pre-injection fuel oil treatment
- B.lube oil filtration
- C.lube oil purification
- D.piston cooling
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______ is used to prevent the entry of sea water to the machinery space.
- A.A special sealing gland
- B.Propeller
- C.Tailshaft
- D.Sterntube bearing
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The crankshaft is of the semi built type, with the journal _____ the forged or cast steel crank throws.
- A.shrunk into
- B.expanded into
- C.extended into
- D.designated into
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Diesel engine control can be obtained by the bridge _____.
- A.at any time
- B.only after the engine room control station is switched to “bridge control”
- C.whenever the secondary station is switched to "bridge control"
- D.with the approval of the chief engineer only
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The part of the anchor windlass that engages the anchor chain for lifting is called the _____.
- A.warping head
- B.fairlead
- C.wildcat
- D.capstan
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If the pump for a hydraulic anchor windlass is overheating, the cause may be _____.
- A.excessive drive motor speed
- B.excessive pump discharge pressure
- C.too low of a tilting box angle
- D.insufficient drive motor speed
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Propulsion of the vast majority of contemporary merchant ships (especially containerships and VLCCs) utilizes____ as prime mover.
- A.gas turbine
- B.diesel engine
- C.steam engine
- D.gasoline engine
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If the capacity of the refrigeration compressor is too small, the excess vapor will accumulate in the evaporator, causing the pressure to _____.
- A.rise
- B.fall
- C.be maintained constant
- D.None of the above is true
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