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
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
Which of the listed substances can be satisfactorily removed from diesel fuel by centrifuging?()
A、Sludge
B、Gasoline
C、Fuel oil
D、Lube oil
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
The over-speed trip device installed in some diesel engines is automatically actuated by()
A、spring force
B、hydraulic pressure
C、centrifugal force
D、mechanical linkage
STCW shall apply to seafarers() on board seagoing ships entitled to fly the flag of a Party.
A、served
B、serving
C、surveyed
D、surveying