A.abrasive particles
B.metallic oxides
C.corrosive acids
D.any or all of the above
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A.low firing pressure
B.low exhaust temperature
C.mechanical knock in each cylinder
D.fuel knock in each cylinder
A.dry liner
B.wet liner
C.jacket liner
D.corrugated liner
A.Steel brush
B.Fine emery cloth or steel wool
C.A section of the removed compression ring
D.A case hardened scraper
A.Return-flow
B.Uniflow
C.Cross-flow
D.Direct flow
A.maintain higher than normal jacket water temperature
B.change the lube oil more frequently than normal
C.maintain a higher air-box temperature than normal
D.maintain a higher air-box pressure than normal
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（） is not installed on the main switchboar.
The shipboard oil pollution emergency plan will be invalid after （）
The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated（）
“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）
The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the（）
Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）
One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is（）
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
The main purpose of port State control is not to（）
For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）