A.pitting
B.sludge
C.hard varnish
D.all of the above
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A.increase ignition delay
B.affect fuel oil metering
C.affect engine performance at low speed
D.only disappear due to fuel oil abrasion
A.oil foaming will occur
B.large quantities of oil are consumed
C.lube oil viscosity is always decreased
D.corrosive by-products are usually formed
A.keep the parts immersed in diesel fuel
B.always keep the plunger and barrel together
C.work over a linoleum-type surface
D.all of the above
A.Used of bimetallic piston rings
B.Ring gap pre-tensioning
C.Thermal increase in ring-end clearance
D.Gas pressure acting against the back of the ring
A.must be centrifuged
B.must by filtered
C.must be changed
D.is holding finely dispersed carbon in suspension
最新試題
Diesel engine air start system check valves are opened by （）
When does auxiliary burner of incinerator put into operation? （）Ⅰ. start incinerator when it is coldⅡ. the sludge for dealing with is littleⅢ. the sludge for dealing with is largeⅣ. the water and impurity in sludge are too muchⅤ. the temperature in incinerator is lowⅥ. dealing with little solid rubbish
Under MARPOL Code the ship to which it applies has to carry （）
Cold weather starting of a diesel engine may be made easier by（）
The cetane rating of diesel fuel is an indication of the （）
If two A.C.generators are to be operated in parallel, the load is distributed evenly by（）
To proceed to the assistance of a ship in distress is（）
The main purpose of port State control is not to（）
If separating effect is not good, which measure should be taken （）
Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）