举一反三
- What is the speed of the crankshaft in a four-stroke/cycle engine when the camshaft is turning at 750 rpm?（）
- A two stroke diesel engine exhaust temperature will be lower than a four stroke diesel engine of the same displacement because the _____. ① MEP is lower and the scavenging air is cooling the exhaust gases ② valve overlap in a four stroke A.① B.② C.① and ② D.Neither ① nor ② is correct
- In a four-stroke engine, the cycle of events is completed in four<br/>strokes of(()) A: the cylinder B: the crankshaft C: the piston D: the crosshead
- In<br/>a four-strokes diesel engine, the cycle requires four separate<br/>strokes of the piston, i.e. ____. A: suction B: compression C: expansion D: exhaust
- With four-stroke engines， it takes four revolutions of the crank shaft to make （） power stroke(s).
内容
- 0
In four strokes engine， the cycle of events is completed in four strokes of （）.
- 1
One of the differences between a two-stroke engine and a four-stroke engine is,（） A: a two-stroke engine works without exhaust operation B: a two-stroke engine works without compression stroke C: a two-stroke engine works without expansion stroke D: a two-stroke engine works without suction operatio
- 2
Which of the two events listed occurs simultaneously in a two-stroke/cycle diesel engine?（）
- 3
In a two-stroke engine that uses a camshaft, each valve is opened _____ for every rotation of the crankshaft; in these engines, the camshaft rotates at the same speed as the crankshaft.In a four-stroke engine, the valves are opened only half as often; thus, _____ of the crankshaft occur for each rotation of the camshaft. A: once ... two full rotations B: twice ...two full rotations C: once ... one full rotation D: twice ... one full rotation
- 4
In a four-stroke engines the camshaft rotates at _____.