海船船员考试
单选题Regarding a Diesel engine crankcase, the general arrangement and installation should preclude the possibility of （）A free entry of air to the crankcaseB water entering the crankcase while engine wash-downs are being performedC excessive oil leakage dur
题目
free entry of air to the crankcase
water entering the crankcase while engine wash-downs are being performed
excessive oil leakage during periods of increased blow-by
sub-cooling internal components
参考答案和解析
相似问题和答案
第1题：
Loss of lubricating oil pressure to the main propulsion diesel engine will actuate a/an _____.
A.over-speed trip
B.audible/visual alarm
C.the ships/boats general alarm
D.reserve oil storage tank
第2题：
The cylinder indicator cocks should be opened
The sump lube oil scavenge pump should be secured immediately
The explosion relief valves should be manually opened
The crankcase should remain unopened until the engine has cooled
第3题：
For a continuous operation diesel engine, a duplex filter unit would be the best arrangement because
A.changing filter elements would not interrupt engine operation
B.filtering occurs twice in each pass of oil through the system
C.clogging will not occur
D.dropping pressure is half of that through a single filter unit
第4题：
changing filter elements would not interrupt engine operation
filtering occurs twice in each pass of oil through the system
clogging will not occur
dropping pressure is half of that through a single filter unit
第5题：
most critical in a four-stroke cycle diesel engine
most critical in a two-stroke/cycle diesel engine
most critical in a four-stroke/cycle diesel engine if it is turbocharged
of equal importance in a two-stroke/cycle diesel engine as in a four-stroke/cycle diesel engine
第6题：
a cracked cylinder liner
excessive water in the fuel
a leaking intercooler
excessive moisture in the scavenge air
第7题：
Lube oil is diluted and its viscosity is reduced
Sulfuric acid is formed
Bearings become pitted ad immediately fail
Valve stems develop sludge deposits
第8题：
A sudden power loss from a turbocharged and after-cooled diesel engine is an indication of a/an
A.turbocharger malfunction or failure
B.crankcase exhauster overload
C.overload on the intercooler
D.obstruction in the engine cylinders
第9题：
wrist pin bushings
compression rings
cylinder liner seals
cylinder liner sealing ring
第10题：
proceed to their man overboard stations
start the fire pump
put on lifejackets and go to their abandon ship stations
secure the propulsion diesel engines and evacuate the engine room