Ifthevalvetappetsinadieselenginearesetatgreaterclearancesthanthosespecifiedbytheenginemanufacturer,thosevalveswill（）
A. openlateandcloseearly
B. openlateandcloselate
C. failtoopenwhentheengineiscold
D. failtoopenatnormaloperatingtemperature
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RegardingaDieselenginecrankcase,thegeneralarrangementandinstallationshouldprecludethepossibilityof（）
A. freeentryofairtothecrankcase
B. waterenteringthecrankcasewhileenginewash-downsarebeingperformed
C. excessiveoilleakageduringperiodsofincreasedblow-by
D. sub-coolinginternalcomponents
FLOATING，NOTCONTROLLED，WITHOUTACLEARLYDETERMINABLEDIRECTIONmeans（）.
A. Grounding
B. Sailing
C. Adrift
D. Runningintodanger
以下不是防爆片的优点的是（）。
A. 密封性能好
B. 反应动作快
C. 不易受介质中粘污物的影响
D. 能反复使用
Lubricatingoilissuppliedtothecrank-pinbearingsinamarinedieselengineby（）.
A. internalcrankshaftpassages
B. immersioninoil
C. splashlubrication
D. injectionlubrication
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