海船船员适任证书三管轮模拟试题1(轮机英语)
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Which of the listed devices could be used as a substitute for a ring grooving tool?
- A.Steel brush
- B.Fine emery cloth or steel wool
- C.A section of the removed compression ring
- D.A case hardened scraper
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Which of the following statements is correct for the design and installation of diesel engine cooling water systems?
- A.An alarm device with audible and visible signals is required for all cooling water systems
- B.Propulsion engines with bores over 200 mm are to be fitted with cooling water jackets
- C.Each totally enclosed cooling system shall be provided with a suitable head tank
- D.Drain cocks are to be provided at the lowest points of all cylinder water jackets
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The discharge head of a centrifugal pump will vary directly with the _____.
- A.change in impeller diameter
- B.square of the impeller diameter
- C.cube of the impeller diameter
- D.impeller efficiency for large changes in the size of the impeller
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Ignition failure in an automatically controlled auxiliary boiler could be caused by .
- A.carbon deposits on the flame scanner
- B.high fuel oil temperature
- C.low fuel oil viscosity
- D.high steam pressure
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A moving object will not accelerate or decelerate ______ a force is applied to it.
- A.whether
- B.if
- C.unless
- D.till
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Medium survey should be carried out _____ times during the valid period of the certificate.
- A.2
- B.3
- C.4
- D.1
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The abbreviation ‘M/E’ is used to represent the .
- A.measure equipment
- B.main electrical
- C.my engine
- D.main engine
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A thermostatic expansion valve is properly controlling evaporator superheatAdjusting this valve to lower the superheat will result in a/an _____.
- A.evaporator pressure decrease
- B.evaporator coil over-feed
- C.evaporator capacity increase
- D.expansion valve diaphragm rupture
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In a ordinary cargo crane, _____ is fitted to rotate the crane.
- A.the slewing motor
- B.the lulling motor
- C.the hoisting motor
- D.none of the above
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Which of the following problems represent one possible cause of high lube oil consumption in a four stroke diesel engine?
- A.Worn intake valve guides
- B.Pitted pre-combustion chambers
- C.Loose valve tappets
- D.High exhaust back pressure
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