单项选择题The fuel injector pump is operated by () which drives the plunger up and down.

A.a separate motor
B.a cam
C.a generator
D.a chain


您可能感兴趣的试卷

你可能感兴趣的试题

2.单项选择题The fresh air coming in through the inner air ports, is compressed by() to a higher pressure.

A.the cylinder head
B.the cross-head
C.the moving piston
D.the stationary piston

6.单项选择题The fine filters will be arranged () one can be cleaned while the other is operating.

A.in order to
B.because of
C.so that
D.so as to

7.单项选择题The film of oil between the rings and the liner is not only essential for the lubrication but also () achieving a gas seal.

A.play a great part on
B.run a role in
C.plays an important part in
D.acts as important part at

9.单项选择题The figure that the volume of air at BDC is divided by the volume of air at TDC is termed as().

A.ignition ratio
B.power ratio
C.compression ratio
D.injection ratio