單項(xiàng)選擇題

The injector pump is operated by a cam which drives （） up and down.

A.the needle valve
B.the plunger
C.the piston
D.the cylinder

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單項(xiàng)選擇題

The indications of a scavenge fire are excessive black smoke, （） and peeling from scavenge trunking.

A.turbo-chargers surge
B.spark seen from the drains
C.paint blistering
D.all above are right

單項(xiàng)選擇題

The indicated power of an engine can be obtained by taking the （）.

A.precautions
B.rpm
C.indicator cards
D.B and C