单项选择题
If the piston groove drain holes for the oil control rings become clogged, which of the following is likely to occur?（）
A.The oil control rings will seal improperly and wear rapidly
B.The piston will overheat due to insufficient lubrication
C.Excessive oil will remain on the cylinder wall
D.Light brown smoke will emanate from the engine exhaust
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相关考题
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单项选择题
Many cast iron pistons are designed with heat dams, which serve to （）
A.keep piston crown temperatures elevated for smoother combustion
B.reduce the possibility of overheating the top compression ring
C.help retain the heat of compression to prevent ignition delay
D.help retain the heat of compression to prevent combustion knock -
单项选择题
The adverse effects of burning high sulfur fuel can be compensated for by using a cylinder oil having sufficient（）
A.dispersant additives
B.floc point
C.alkalinity additives
D.ignition quality -
单项选择题
Scuffed cylinder liner surfaces in a diesel engine can result form（）
A.starting the engine hot
B.knurling the piston skirt
C.operating an overheated engine
D.using scuff resistant piston rings
