The RT-flex engine can run at very low speed,  this is made possible by following things except _______.

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• 1The key feature of the Sulzer RT-flex system is that it gives complete freedom in the _____ and operation of fuel injection and exhaust valve actuation.

  A.metering

  B.timing

  C.control

  D.using

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• 2According to above massage, RT-flex engine can optimize______.① fuel injection pressure② combustion  ③ exhaust valve timing

  A.①②

  B.①②③

  C.③

  D.②

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• 3According to above massage, the advantage of common-rail injection is______.

  A.smokeless operation

  B.shockless operation

  C.noiseless operation

  D.no vibration operation

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• 4The ship security officer shall have knowledge and have received training, taking into account the guidance given in Part B of______.

  A.the ISM Code

  B.the ISPS Code

  C.the IBC Code

  D.the IGC Code

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• 5These acid residues must be prevented from entering the crankcase, otherwise the lube oil would be _______ .

  A.optimized

  B.emulsified

  C.contaminated

  D.oxidated

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