four cycle
compression ignition
vacuum ignition
external combustion
第1题：
All diesel engines are classified as ______．
A.Four cycle
B.Compression ignition
C.Vacuum ignition
D.External combustion
第2题：
less even torque
higher cylinder head temperatures
fewer power strokes per revolution
greater weight/size requirements
第3题：
Proper lubrication of the main bearings is more easily obtained in a single acting, four-stroke/cycle diesel engine than in a tow-stroke/cycle diesel engine because________.
A.The direction of pressure on the journal in four-stroke engine is continuously
B.positive feed lubricators are installed on all bearings of four-stroke engine, whereas as a splash feed system is used on tow-stroke engine
C.four-stroke engines usually utilize a heavier grade of oil than tow-stroke engines
D.Low-stroke engines usually consume less lube oil than four-stroke engines
第4题：
Diesel engines have more advantages in comparison with gasoline engines
Diesel engines have more advantages in comparison to gasoline engines
Gasoline engines have more advantages in comparison with diesel engines
Gasoline engines have more advantages in comparison to diesel engines
第5题：
chromium plating piston rings
knurling the piston skirt
extended maximum power operation
applying load to a cold diesel engine
第6题：
Vessels required to be equipped with an approved backfire flame arrester are ______．
A.Those with diesel engines
B.All those with gasoline engines
C.Those with large engines only
D.None of the above
第7题：
wide compression rings are used
oil rings are located above the piston
chromium plating is used on all piston rings
oil rings are located near the bottom of the piston skirt
第8题：
The challenge that newspapers faced from the website is （ ）
[A] the small text-ads that appear alongside search engines
[B] the localization of website and more elaborate service
[C] the display advertisements
[D] the classified advertisements
第9题：
they are more heavily built
the fuel used is less volatile
they can be easily reversed
they operate at a lower speed
第10题：
The direction of pressure on the journal in four-stroke engine is continuously
positive feed lubricators are installed on all bearings of four-stroke engine, whereas as a splash feed system is used on tow-stroke engine
four-stroke engines usually utilize a heavier grade of oil than tow-stroke engines
Low-stroke engines usually consume less lube oil than four-stroke engines