Which one is NOT the ‘clear grounds’ for a more detailed inspection?（）
A、absence of engine log book
B、serious corrosion on the hull
C、one page missing in the oil record book
D、paint peeling off some tailings in engine rooms
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A diesel engine should not be operated at low loads for long periods of time because（）
A、heavy carbon deposits will buildup on the valves and in the exhaust
B、fuel dilution is increased at low load
C、exhaust valves may be damaged
D、all of the above
Which of the listed substances can be satisfactorily removed from diesel fuel by centrifuging?（）
A、Sludge
B、Gasoline
C、Fuel oil
D、Lube oil
During the watch at sea （） should be logged or recorded in the engine log book.
A、the running hours of the cooling water pump
B、chief engineer’s order
C、the main parameters of main and auxiliary equipment
D、the position of the vessel
Valve cages are used on some large diesel engines to （）
A、reduce wear on the valve stem
B、permit the use of alloy valve seat materials
C、reduce heat transfer from the valve seat
D、facilitate valve removal for servicing
Late fuel injection in a diesel engine is indicated by low firing pressure with （）
A、low exhaust temperature
B、low exhaust pressure
C、mechanical knock in each cylinder
D、black or gray exhaust smoke
