If the engine is naturally aspirated, or is a small high-speed type with a centrifugal turbocharger, the period of valve overlap（）,ie when both valves are（）, will be and the exhaust valve will close some 10°top dead canter（）.
1、If the diesel engine fuel injection ti
If the diesel engine fuel injection timing is changed to delay the start of injection until the pistons are at top dead center, the engine w...
2、If a scavenge fire starts, the engine
If a scavenge fire starts, the engine must be put to “（）” and the fuel must be taken off the cylinders affected by the fire.Astop engineBfinished with engineCdead slow aheadDdead slow aster
3、The natural order hypothesis is presum
The natural order hypothesis is presumed by Krashen to be the result of the learned system, operating free of conscious grammar.（）A正确B错误
4、The strongest of the natural fibers is
The strongest of the natural fibers is（）.AcottonBhempCmanilaDsisal
5、If the engine （） for a long period, th
If the engine （） for a long period, there will be a danger of frost.Amust to stand inoperativeBhas to stand inoperativeCmust be stood idleDwill stand idle
6、If the main engine of an unattended en
If the main engine of an unattended engine room shuts down automatically, it will be indicated by an alarm （）.Aat each control stationBin the chief engineer’s quartersCin the captains quartersDAll of the above are correct