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单选题
The highest loads applied to the diesel engine crankshaft main bearings are （）
A
axial loads
B
firing loads
C
inertia loads
D
centripetal loads
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单选题The camshaft drive is designed to maintain proper camshaft speed relative to crankshaft speedIn maintaining this relationship, the camshaft drive causes the camshaft to rotate at（）A
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单选题Lubricating oil is supplied to the crank-pin bearings in a marine diesel engine by （）.A
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increased carbon buildupB
burning of intake valvesC
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单选题How many power strokes per crankshaft revolution are there in an eight cylinder, two stroke/cycle diesel engine?（）A
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单选题Critical speeds occurring within the operating speed range of a main propulsion diesel engine may be changed, or have their damaging effects reduced by a/an （）A
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detuner or viscous fluid damperC
lightened crankshaft flywheelD
spherically seated crankshaft bearing
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单选题On a large diesel engine installation, crankshaft axial alignment is maintained by the （）A
piston rod guidesB
engine thrust bearingC
crosshead bearingD
main shaft flexible coupling
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tension stretchB
tie rodsC
through boltsD
main bearings
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thrust blockB
sounding rodC
connecting rodD
push rod
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单选题Critical speed in diesel engines occurs when engine torque pulsations become （）A
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单选题The highest pressure in a diesel engine cylinder normally occurs （）.A
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before TDCC
after TDCD
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单选题If a crankcase explosion occurs in a diesel engine, which of the listed actions should be taken?（）A
Open the crankcase immediately to check for damageB
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Allow the engine to cool before opening the crankcaseD
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考题
单选题Misfiring in a diesel engine at light loads can be caused by（）A
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考题
单选题In a four-stroke/cycle diesel engine, the camshaft rotates at （）A
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