單項選擇題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.單項選擇題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.單項選擇題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.單項選擇題A governor automatically controls engine speed by regulating ().

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