A . a failure of the motor
B . a failure of lubricator
C . a failure of cylinder
D . a failure of fuel pum
[单选题]________is supplied with electricity by main switchboard directly not through sub-board on boardA.Deck machineryB.Little power loadC.Some important load machineryD.Stationary submersible pump
[单选题]F.or _______the power is supplied by main switchboard directly not through sub-boardA.saving network costB.improving the reliability of supplying power to important loadC.preventing sequence reversingD.increasing the power Factor of important load
[单选题]The compressed air is supplied by () to the air reservoirs.A . compressorsB . forced fansC . ventilatorsD . generator
[单选题]() is (are) not power supplied by main switchboard directly.A . Steering gear and windlassB . Navigation light and radio power panelC . Navigation device power boxD . Daily fresh water pum
[单选题]Lubricating oil is supplied to the crank-pin bearings in a marine diesel engine by ().A . internal crankshaft passagesB . immersion in oilC . splash lubricationD . injection lubricatio
[单选题]The engine is started with () supplied from air receivers.A . pressure oilB . pressure waterC . compressed airD . cooling water
[单选题]Oil is supplied to the cylinder wall and () by means of mechanical lubricators.A . the cylinder coverB . the piston ringsC . the piston crownD . the piston skirt
[单选题]Fuel injection systems meter fuel, atomize fuel, and ().A . create turbulence in the combustion chamberB . aid in completing cylinder scavengingC . inject fuel at the proper timeD . minimize fuel penetration into the cylinder
[单选题]During the fuel injection period, fuel pressure must exceed cylinder gas pressure to ().A . ensure penetration and distribution of the fuel in the combustion chamberB . ensure the needle valve is flushed clean during each injectionC . prevent combust
[单选题]Which system should be supplied to obtain the best efficiency and lowest emissions?A.Lean combustion principleB.Fuel oil systemC.Electrical control systemD.Electronic control system