题目内容
（请给出正确答案）
Diesel engine mufflers accomplish noise reduction by _____.
A.reducing exhaust gas velocity
B.increasing the frequency of gas vibration
C.the use of long head pipes
D.the use of zinc electrodes
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更多“Diesel engine mufflers accompl…”相关的问题
第1题
The diesel engine is also called compression ignition engine because______.
A compression stroke is one of the four-strokes of a diesel engine.
B the diesel engine is ignited by the heat of compression not by spark .
C the diesel engine has a very high compression ratio.
D Both A and B
第2题
The crankshaft of diesel engine is supported by _____.
A.tension stretch
B.tie rods
C.through bolts
D.main bearings
第3题
In four-stroke diesel engine, the cycle of events is completed in () of crankshaft.
A.one revolution
B.two revolutions
C.four revolutions
第4题
As a heat engine, () energy is the source of power by which a diesel enginecan be operated.
A.heat
B.electric
C.light
第5题
A the air is compressed in the sealed cylinder in the diesel engine
B the petrol engine has a comparatively very low compression ratio
C combustion occurs by spark ignition in the diesel engine
D Both A and B
第8题
The diesel engine is a type of _____.
A.turbine engine
B.gas turbine
C.steam engine
D.internal combustion engine
第9题
Defective air cooler in a diesel engine will lead to .
A.smoky exhaust
B.starting failure
C.overload
D.over speed
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