海船船员考试
单选题In a normally operating diesel engine, the main cause of lubricating oil contamination in the crankcase is a result of the （）.A metal particles loosened by wearB air when no air cleaners are usedC condensation of water vaporsD breakdown of the lubricat
题目
metal particles loosened by wear
air when no air cleaners are used
condensation of water vapors
breakdown of the lubricating oil by dilution
相似问题和答案
第1题：
increase
decrease
remain the same
increase on compression decrease on expansion
第2题：
Exhaust temperature
Lube oil level
Lube oil pressure
Water level in the expansion tank
第3题：
Impeller
Compressor
After-cooler
Exhaust differ
第4题：
open air-box drains
loss of cooling water to the diffuser
gradual fouling of the air filters
improperly timed exhaust valves
第5题：
To reduce the main engine speed
To increase the main engine speed
To govern the main engine speed
To fix the propeller shaft
第6题：
an overfilled expansion tank
excess chromate treatment of the jacket water
a clogged raw water sea suction
cavitation erosion of the heat exchanger tubes
第7题：
Exhaust temperatures
Raw water pressure
Lube oil pressure
Air box pressure
第8题：
the engine to run after the fuel has been secured
the engine to over-speed
a fire
all of the above
第9题：
check the cylinder exhausts for black smoke
listen for combustion knock in that cylinder
isolate each cylinder and inspect the injector
check the cylinder exhaust temperature frequently
第10题：
Over speed
fire improperly
lose oil pressure
overheatrapidly