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单选题
A diesel engine is operating with excessively high exhaust temperatures at all cylindersTo correct this condition, you should FIRST （）.
A
reduce the engine load
B
increase the cooling water flow
C
increase the lube oil pressure
D
adjust the fuel rack
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单选题The loss of the diesel engine cylinder air charge through leaky valves, piston rings, worn or scored liners, would be indicated by which of the following sets of conditions?（）A
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单选题One result of operating a diesel engine at light load with excessively low cooling water temperature is a/an （）A
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reduction in lube oil viscosityD
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考题
单选题How would the exhaust of a properly operating diesel engine appear?（）.A
Light blue hazeB
Light brown hazeC
Light gray hazeD
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单选题One remedy for a high firing pressure, in addition to a high exhaust temperature in one cylinder of a diesel engine, is to （）A
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单选题Oil oxidation, as a result of excessively high lube oil temperature, is harmful to a diesel engine because （）A
oil foaming will occurB
large quantities of oil are consumedC
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