问题：
[单选] Sudden unloading of a diesel engine can cause（）.
decreased fuel efficiency。increased exhaust temperature。black smoke。overspeed tri。
问题：
[单选] The engine in a covered lifeboat is fueled with（）.
kerosene。unleaded gasoline。diesel oil。liquefied ga。
问题：
[单选] The most serious effect of air trapped in a diesel engine jacket water cooling system is that it（）.
causes colloid suspension in the cooling water。reduces the capability of the lubrication system。can form pockets which block the flow of coolant through the system。leads to the scuffing of cylinder wall。
问题：
[单选] The part of a windlass which physically engages the chain during hauling or paying out is the（）.
devil's claw。bull gear。wildcat。cat head。
问题：
[单选] The pivot pin at the base of a sheath-screw boom davit must be（）.
inserted each time before the booms are cranked out。periodically removed for inspection and lubricated。replaced at each inspection for certification。in the locked position after the boat is cradled and griped dow。
问题：
[单选] The ship has a diesel engine（）a supercharger.
with。of。on。over。
问题：
[单选] Vessels required to be equipped with an approved backfire flame arrester are（）.
those with diesel engines。all those with gasoline engines。those with large engines only。None of the above。
问题：
[单选] What condition will result in the automatic shutdown of a diesel engine? （）
High jacket water pressure。High lube oil pressure。Low lube oil pressure。Excessive turbo charger speed。
问题：
[单选] What does a pyrometer measure on a diesel engine? （）
Water temperature。Water pressure。Exhaust temperature。Air box pressure。
问题：
[单选] What is an advantage of a steam turbine over a diesel for the main propulsion?（）
Faster response from ahead to astern。Less fuel consumption。Cheaper initial installation cost。Less weight per unit of horsepower。
