海船船员考试
单选题The exhaust gases in a supercharged two-stroke/cycle diesel engine are expelled from the cylinder by （）A pumping action of the pistonB pressure of the fuel chargeC vacuum developed in the manifoldD pressure of the fresh air charge
题目
pumping action of the piston
pressure of the fuel charge
vacuum developed in the manifold
pressure of the fresh air charge
相似问题和答案
第1题：
natural aspiration
masked intake valves
air cells
scavenging air
第2题：
up and draw in a fresh air charge
down to burn off fuel
down to compress the fuel air charge
up and force out the exhaust gases
第3题：
Exhaust gases are generally removed from the cylinders of a two-stroke/cycle diesel engine by
A.natural aspiration
B.masked intake valves
C.air ceils
D.scavenging air
第4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5题：
(1) only is correct
(2) only is correct
both (1) and (2) are correct
Neither (1) or (2) are correct
第6题：
less even torque
higher cylinder head temperatures
fewer power strokes per revolution
greater weight/size requirements
第7题：
one half crankshaft speed in a two-stroke cycle diesel engine
crankshaft speed in a two-stroke cycle diesel engine
two times crankshaft speed in a two-stroke cycle diesel engine
one-fourth times crankshaft speed in a four-stroke cycle diesel engine
第8题：
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
第9题：
provide exhaust back pressure
prevent exhaust smoke emissions
power a reciprocating supercharger
muffle exhaust gas noise
第10题：
Exhaust and scavenging
Scavenging and compression
Ignition and expansion
Exhaust and compression