單項選擇題The four-stroke engine is used for （） and sometimes for main propulsion with a gearbox to provide a propeller speed of between 90 to 120 rev/min.

A.alternator
B.turbo-charger
C.remote controller
D.windlass


您可能感興趣的試卷

你可能感興趣的試題

2.單項選擇題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

3.單項選擇題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

5.單項選擇題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