单项选择题
Low compression results from （）.
A.a worn cylinder
B.broken piston rings
C.either A or B
D.none of the above
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相关考题
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单项选择题
Low compression of diesel engine may result from （）
A.a worn cylinder
B.broken piston rings
C.any of A and B
D.none of the above -
单项选择题
Leaky exhaust valve will result in which of the following?（） (1) high exhaust temperature; (2) low compression pressure; (3) low firing pressure.
A.(1) and (2)
B.(1) only
C.(2) only
D.(1),(2) and (3) -
单项选择题
Large marine diesel engines of crosshead construction generally have two systems of lubrication: a total loss system feeding the （） and a recirculation system lubricating the running gear and cooling the piston.
A.cylinder liners and piston rings
B.main bearings
C.crankpin bearings
D.turboblower
