單項選擇題During the power stroke of a four-stroke/cycle diesel engine, most of the side thrust of a trunk-type piston is absorbed by the()

A.piston skirt
B.pinion
C.crosshead
D.compression rings


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1.單項選擇題A pyrometer is an instrument commonly used to measure()

A.cylinder pressure
B.flame intensity
C.exhaust gas temperature
D.crankshaft axial alignment

2.單項選擇題Worn main bearings in a diesel engine can result in ()

A.decreased compression pressure
B.increased lube oil pressure
C.lower lube oil temperature
D.excessive leakage past the piston rings

3.單項選擇題When monitoring diesel engine performance, the most useful instrument to use is the ()

A.dwell-tachometer
B.exhaust gas pyrometer
C.fuel flow rate mete
D.exhaust gas analyzer

4.單項選擇題Low compression in a diesel engine could be caused by()

A.worn or broken cylinder liner sealing rings
B.high cooling water temperature
C.worn or broken piston rings
D.low fuel oil pressure

5.單項選擇題The most common instrument used to measure diesel engine exhaust pressure is the ()

A.pyrometer
B.bourdon gauge
C.pneumercator
D.manometer