Air scavenging of a diesel engine cylinder__________.
A.blows out the exhaust gases
B.supplies oxygen for combustion
C.cools the valves and cylinder walls
D.all of the above
第1题
A.liquid
B.oily mixture
C.emulsion
D.vapor
第2题
A.excess amount of oily-water mixtures in bilges
B.insulation of piping including exhaust pipes in engine room contaminated by oil
C.improper operation of bilge pumping arrangements
D.there were an actual emergency
第3题
A.the inlet valve is open
B.the exhaust valve is open
C.both valves are closed
D.both valves are open
第4题
A.Oil inlet valve opening too quickly
B.Oil temperature too high
C.Diameter of gravity disc too small
D.Viscosity of oil too low
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