單項選擇題The abbreviation BDC means ().

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


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2.單項選擇題The () or balance tank collects the re-circulated fuel oil.

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

3.單項選擇題The () or balance tank collects the re-circulated fuel oil.

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

4.單項選擇題The () chamber is enclosed between the cylinder head and piston.

A.lubrication
B.injection
C.cooling
D.combustion