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部分试题展示：
A compound gage is used for measuring pressures both above and below_____ .
A. absolutepressure
B.latent pressure
C.flow pressure
D.atmospheric pressure
A diesel engine with a combustion chamber located between the crowns of two pistons is
known as a/an_____
A.double-acting engine
B.opposed pistons engine
C. single-actingengine
D.horizontal acting engine
have a cylinder oil having a______ .
A.low TBN value
B.high alkaline reserve
C.low flashpoint
D.high pour point
1. According to the Passage, the best time to adjust the valve clearance is _____.
A. before the engine is started B. when the engine is running
C. after the engine has just been stopped D. when something has gone wrong with the engine
注：根据文章来看，调节阀间隙的最好时间是在发动机启动之前。
2. The roller and the tappet assembly are lubricated by means of_____.
A. the main lube system B. the secondary oil system
C. the special pumping system D. the turbine oil system
注：滚轮和挺杆组件借助于主润滑系统润滑。
3. According to the Passage, the valve drive mechanism does not include_____.
A. tappet rollers B. push rods C. nodular cast iron D. yokes and guide pins
注：根据文章来看，阀驱动机构不包括球墨铸铁。（包括挺杆滚轮、顶杆、吊梁和导销）
4. To close valves tightly, which clearance should be inspected according to the maintenance schedule?
A. The one between the cam and the tappet roller. B. The one between the push rods and the ban joints.
C. The one between the rocker arms and the yoke D. The one between two tubular push rods.
注：依据保养清单，要紧密的关闭阀件，应检查摇臂和吊梁之间的间隙。
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