单项选择题

Sea water is not directly used as a coolant for engines because of its （）.

A.low specific heat
B.corrosive action
C.high expense
D.acid property

点击查看答案&解析

上一题目录下一题

相关考题

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

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