單項選擇題The most crucial time for any bearing with regards to lubrication is ()

A.during low loads
B.after proper oil viscosity is reached
C.during starting
D.after cleaning filters


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1.單項選擇題If a main propulsion diesel engine hunts excessively at idle speed, you should ()

A.adjusts the idle speed control
B.drain and flushes the governor and replace the oil
C.adjusts the compensating needle valve

3.單項選擇題Air bubbles in a hydraulic governor can cause ()

A.sluggish response
B.speed droop variations
C.isochronous governing
D.sensitivity increase

4.單項選擇題On a diesel engine equipped with an isochronous governor, if the “speed droop” control is reduced to the “zero” setting, the engine ()

A.speed will drop drastically with any increase in load
B.will stop due to zero fuel supply
C.will stall upon application of load
D.speed will remain fairly constant despite load changes

5.單項選擇題Proper operation of the main engine reduction gear set requires the operation to monitor ()

A.the sump oil level
B.oil flow sight glasses
C.bearing temperatures
D.all of the above