单项选择题
"Scavenging" on a diesel engine means （）.
A.injecting fuel oil into a cylinder
B.removing exhaust gases from the cylinder
C.forcing air into the cylinders under pressure after the exhaust valve has dosed
D.a combination of all the above
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相关考题
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单项选择题
Scavenging is （） of exhaust gases by blowing in fresh air.
A.the suction
B.the compression
C.the removal
D.the deliver -
单项选择题
Rotating flyweights acting against spring pressure make a simple type of （）.
A.governor
B.safety valve
C.reducing valve
D.feed water regulator -
单项选择题
Remote control means that the system is being controlled by the operator who is situated （） from the system.
A.automatic
B.local
C.remote
D.manual
