单项选择题
In a large, low-speed diesel engine the clearance between the piston crown and cylinder head is found to be excessiveIn order to correct for this, you should（）
A.build up the piston crown by metal spraying
B.build up the cylinder head by metal spraying
C.insert shims between the crankpin bearing box and the connecting rod foot
D.install a thinner head gasket
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相关考题
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单项选择题
A mixture of 45%cetane and 55% alpha-methyl-naphthalene is found to have the same ignition delay as a sample of diesel oil √The sample can be described as having a/an（）
A.cetane number of 55
B.cetane number of 45
C.octane number of 55
D.octane number of 45 -
单项选择题
Worn main bearing will cause the compression ratio of an auxiliary diesel engine to（）
A.increase
B.decrease
C.remain the same
D.increase on compression decrease on expansion -
单项选择题
With respect to diesel fuel, the ease with which a cold engine will start is dependent upon the（）
A.ignition quality of the fuel
B.high heating value of the fuel
C.amount of carbon residue after combustion
D.internal flow resistance in the injectors
