单项选择题
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
Scavenging is （） of exhaust gases by blowing in fresh a...
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
Rotating flyweights acting against spring pressure make...
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
Remote control means that the system is being controlle...
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
