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航海英语船舶动力装置单项选择题每日一练(2019.01.10)

  • 单项选择题

    A thrust block is designed to().

    A.absorb the shock of wave pressure at the bow
    B.be placed between the engines and the foundation to absorb the vibration
    C.transmit the thrust of the engine to the propeller
    D.transmit the thrust of the propeller to the vessel

  • 单项选择题

    What is the effect of heated intake air on a diesel engine? ()

    A.Increases efficiency
    B.Increases engine horsepower
    C.Increases engine life
    D.Reduces engine horsepower

  • 单项选择题

    On a vessel with a single propeller,transverse force has the most effect on the vessel when the engine is put().

    A.full ahead
    B.full astern
    C.half ahead
    D.slow astern

  • 单项选择题

    How does combustion air enter the cylinder of a two-cycle diesel engine?()

    A.Cylinder head valves
    B.Ports
    C.Turbo chargers
    D.Bleeder valves

  • 单项选择题

    Many sheath-screw davits have markings to indicate the maximum angle to which they should be cranked out. If the angle is exceeded,the davit().

    A.may jam against the stops
    B.will not automatically position the boat at the embarkation station
    C.screw may come out of the sheath
    D.will chafe against the falls and may cause their failure

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