單項選擇題The pressure of pilot air is usually () than that of starting air.

A.higher
B.lower
C.low
D.high


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1.單項選擇題The power generated in the turbine must () that required by the compressor.

A.be less than
B.be larger than
C.be as large as
D.not be so large as

2.單項選擇題The position of the piston parts in relation to each other is secured by means of () and a dowel pin in the crown.

A.bosses
B.through bolts
C.machine-turned recesses
D.long studs

3.單項選擇題The position of the piston parts in relation to each other is secured by means of () in the crown.

A.a mark
B.a bolt
C.a dowel pin
D.a measuring tool

4.單項選擇題The position of the interface between oil and water within the centrifuge is achieved by the use of ().

A.gravity disc
B.centrifugal bowl
C.a stack of discs
D.main sealing ring

5.單項選擇題The position of () on the crosshead on a large diesel engine is determined by dowel pins.

A.the guideway
B.the piston rod
C.the crosshead shoes
D.the interlocked circlip