单项选择题A level gauge for a tank is to ().

A.give the pressure
B.give the contents
C.give the shape of the tank
D.give the accuracy level


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1.单项选择题A hot air start pipe indicates that there is ().

A.inefficient cooling
B.a leaking air start valve
C.a clogged drain valve
D.a leaking air bottle

2.单项选择题A high temperature alarm or () which will melt is used to guard against the explosion of compressor air pipelines.

A.a flame trap
B.a relief valve
C.a fusible plug
D.a bursting cap

5.单项选择题A governor automatically controls engine speed by regulating ().

A.fuel supply
B.firing order
C.engine load
D.oil level

8.单项选择题A distance piece, known as a () may be interposed between the rod and the bearing housing.

A.bearing shell
B.bearing liner
C.compression plate
D.lead wire

9.单项选择题A diesel engines crankcase oil level is found to be too high√ You should suspect that ().

A.the engine was over filled
B.there might be a fuel leak
C.there might be a water leak
D.all of the above

10.单项选择题A diesel engine is similar to a gasoline engine except that the former has no ().

A.cross-head
B.cylinder
C.connecting rod
D.spark plug