overloading the engine
low exhaust valve lift
excessive cylinder cooling
insufficient mechanical clearance
第1题：
Slow speed diesel engines
Medium-speed diesel engines
Steam engines
Gasoline engines
第2题：
vacuum pressure
specific gravity
heat
viscosity
第3题：
Which of the following reasons represents why the designed compression ratio of a gasoline engine is lower than that of a diesel engine?
A.compression must be low for effective spark ignition
B.compression must be low for required horsepower and torque generation
C.compression must be low to prevent pre-ignition
D.compression must be low to have effective pre-ignition
第4题：
Shape of the piston crowns
Increasing the compression ratios
Increasing the piston crowns
Increasing the turbocharger gear ratio
第5题：
Decreased connecting rod bearing clearance
Increased connecting rod bearing clearance
Decreased compression ratio
Increased compression ratio
第6题：
ignition lag
engine horsepower
lube oil system pressure
specific fuel consumption
第7题：
increase
decrease
remain the same
increase on compression decrease on expansion
第8题：
When using a fuel with a higher than normal sulfur content in an auxiliary four stroke diesel engine, you may
A.maintain higher than normal jacket water temperature
B.change the lube oil more frequently than normal
C.maintain a higher air-box temperature than normal
D.maintain a higher air-box pressure than normal
第9题：
caused by retarded injection timing
caused by a mechanical defect in one cylinder
caused by high fuel injection pressures
normal for these conditions
第10题：
air quantity aspirated
fuel injection pressure
combustion pressure on the power stroke
compression on the compression stroke