the cylinder
the crankshaft
the piston
the cross-head
第1题：
less even torque
higher cylinder head temperatures
fewer power strokes per revolution
greater weight/size requirements
第2题：
timing
power
firing order
dead center
第3题：
Proper lubrication of the main bearings is more easily obtained in a single acting, four-stroke/cycle diesel engine than in a tow-stroke/cycle diesel engine because________.
A.The direction of pressure on the journal in four-stroke engine is continuously
B.positive feed lubricators are installed on all bearings of four-stroke engine, whereas as a splash feed system is used on tow-stroke engine
C.four-stroke engines usually utilize a heavier grade of oil than tow-stroke engines
D.Low-stroke engines usually consume less lube oil than four-stroke engines
第4题：
Exhaust and scavenging
Scavenging and compression
Ignition and expansion
Exhaust and compression
第5题：
The sequence of events that produce a power pulse
One rotation of the engine crankshaft
One stroke of a piston
All of the above
第6题：
Inefficient scavenging；twice
Inefficient scavenging；1~8 times
Fewer strokes in a circle；twice
Fewer strokes in a circle；1~8 times
第7题：
Crankshaft revolution
Type of engine (diesel or gasoline)
Distance a piston travels during a stroke
Number of pistons
第8题：
If all other conditions such as bore, stroke, speed, and mean effective pressures are equal, a two stroke/cycle diesel engine will develop approximately
A.the same indicated horsepower as a four-stroke/cycle engine
B.twice the indicated horsepower as a four-stroke/cycle engine
C.one half the indicated horsepower as a four-stroke/cycle engine
D.one power stroke for every two crankshaft revolutions
第9题：
most critical in a four-stroke cycle diesel engine
most critical in a two-stroke/cycle diesel engine
most critical in a four-stroke/cycle diesel engine if it is turbocharged
of equal importance in a two-stroke/cycle diesel engine as in a four-stroke/cycle diesel engine
第10题：
The direction of pressure on the journal in four-stroke engine is continuously
positive feed lubricators are installed on all bearings of four-stroke engine, whereas as a splash feed system is used on tow-stroke engine
four-stroke engines usually utilize a heavier grade of oil than tow-stroke engines
Low-stroke engines usually consume less lube oil than four-stroke engines