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單項(xiàng)選擇題

The abbreviation BDC means （）.

A.Boston Diesel Company
B.base circle diameter
C.switch board case
D.bottom dead center

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單項(xiàng)選擇題

The （） in the injector will lift at a pre-set pressure which ensures that the fuel will atomize once it enters the cylinder.

A.needle valve
B.nozzles
C.piston
D.spring

單項(xiàng)選擇題

The （） or balance tank collects the re-circulated fuel oil.

A.overflowing
B.sump
C.bilge
D.buffer