For a main diesel engine the lube oil in the bearings is drawn from （）, usually located in the bedplate.

[单选题]In a diesel engine lube oil system, which of the following parts should be lubricated first?（）A . Camshaft beatingsB . Main bearingsC . Piston crownsD . Cylinder wall

Most large, low-speed, main propulsion diesel engines use duplex lube oil strain

[单选题]The fuel oil system for a diesel engine can be considered in two parts--the fuel supply and the （） systems.A . fuel treatmentB . fuel combustionC . fuel injectionD . fuel separating

[单选题]A dirty diesel engine oil filter element can best be detected by （）.A . visual inspection of the elementsB . the pressure drop across the filterC . high lube oil sump temperatureD . decrease in oil viscosity from the filter

[单选题]The main propulsion diesel engine jacket water temperature rises above normal, with the raw sea suction and the expansion tank water level being normal. Which of the following problems is most likely the cause?A．Faulty thermostatic bypass valveB．Erod

[单选题]The main moving parts of a diesel engine consist of the （） and the pistons.A . bedplate, connecting rodsB . crankshaft, the connecting rodsC . frames, crossheadsD . crankshaft, the cylinder

[单选题]Diesel engine main and connecting rod precision bearings are made in halvesEach half exceeds one-half the bearing circumference by a small amountThe small amount is termed （）.A . clearanceB . crushC . pitchD . thrust

[单选题]The oil index of main engine should be controlled to prevent it from ____ in heavy weather.A．over heatB．over speedC．over pressureD．over worn

[单选] In a bypass type lubrication system for a diesel engine， the dirty oil line

[单选题]The quality of the fuel oil and lube oil （）, Im afraid.A . has much to do with the operation of the engine and its lifeB . have much to do with the operation of the engine and its lifeC . has much doing with the operation of the engine and its lifeD