A.the piston cooling oil return pipes
B.the main and crankpin bearings
C.thrust and intermediate bearings
D.stern tube and thrust bearings
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A.the upward stroke
B.the downward stroke
C.the power stroke
D.the suction stroke
A.clockwise
B.anticlockwise
C.crosswise
D.vertically
A.transverse
B.longitudinal
C.circumferential
D.radial
A.micro-seizure
B.scratch
C.break
D.stick
A.Lack of elastic tension, when the rings are pressed into the groove by means of a stick
B.Blackish appearance
C.Fractured rings and missing rings
D.all off the above
最新試題
Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）
One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is（）
“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）
The condensers located in various stages of a flash evaporator are cooled by（）
Cold weather starting of a diesel engine may be made easier by（）
Under MARPOL Code the ship to which it applies has to carry （）
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.
The shipboard oil pollution emergency plan will be invalid after （）
Which of the following items don’t belong to dock repair works?（）