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单选题
() clearances in the main or crank pin bearings will sometimes be indicated by loss of pressure in the lubricating system before any bearing knock is heard.
A
Too larger
B
Too smaller
C
Excess
D
Excessive
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banjo feedB
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单选题The crank pin journal is provided with large bores for ().A
lubricationB
coolingC
balancing purposeD
ventilation
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单选题The highest loads applied to the diesel engine crankshaft main bearings are ()A
axial loadsB
firing loadsC
inertia loadsD
centripetal loads
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单选题Which of the following may take place if the clearance of the main bearings are excessive?()A
bearing knocksB
dropping of pressure of LOC
noisesD
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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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immersion in oilC
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单选题Cold weather starting of a diesel engine is more difficult than warm weather starting due to()A
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单选题The load limitation of governor should be reduced when ship navigating at sea, the main reason is to()A
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prevent governor from being damaged because of swingC
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单选题One method of determining crankshaft misalignment is by()A
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单选题Excessive clearances in the main or crank-pin bearings will sometimes be indicated by () before any bearing knock is heard.A
loss of flow in the fuel systemB
loss of pressure in the air systemC
loss of flow in the lubricating systemD
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单选题Although the crankshafts of medium diesel engines appear to be robust, they rely on the support of () to develop their full strength.A
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worn main bearing journalsB
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单选题In some modern large diesel engines, which of the following is used as the support for the main bearings?()A
BedplateB
BlockC
BaseD
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