單項(xiàng)選擇題

If clearance between a piston and the cylinder wall is excessive, piston slap will occurThe slap itself is caused by （）

A.alternation of side thrust
B.a breakdown of the lube oil film on the cylinder wall
C.worn piston boss piston pin bearings
D.fluctuating gas pressure in the combustion space

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單項(xiàng)選擇題

Poor quality fuel being used in a turbocharged medium-speed, diesel engine could result in （）

A.hard starting
B.excessive fuel consumption
C.loss of power
D.all of the above

單項(xiàng)選擇題

Many diesel engine exhaust valves are being constructed with hollow stems filled with sodium in order to （）

A.provide added wear protection against today’s corrosive quality of fuel
B.increase overall valve strength due to the high gas pressures
C.assist in dissipating heat due to the extreme operating temperatures
D.reduce the overall weight of the valve thus helping eliminate valve spring surge and hammering

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If clearance between a piston and the cylinder wall is excessive, piston slap will occurThe slap itself is caused by （）

你可能感興趣的試題

Poor quality fuel being used in a turbocharged medium-speed, diesel engine could result in （）

Many diesel engine exhaust valves are being constructed with hollow stems filled with sodium in order to （）