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
Which of the following items don’t belong to dock repair works?（）
One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is（）
（）connectors hold best if a wire is accidentally pulled or a connection becomes loose.
The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the（）
Which one is NOT the ‘clear grounds’ for a more detailed inspection?（）
“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）
The ISPS Code consists of a mandatory section-Part A, which shows（）
The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated（）
Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）
The condensers located in various stages of a flash evaporator are cooled by（）