After every trip
Every 4000 hours
According to manufacturer’s instructions
Every time they are shutdown
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：
water in the fuel
insufficient fuel for combustion
clogged air intake passages
burning lubricating oil
第3题：
A diesel engine exposed to widely varying ambient temperatures should use to a lubricating oil with .
A.a high viscosity index
B.a low viscosity index
C.neutralize acids
D.resist oxidation at high temperatures
第4题：
open the bypass line
cut in the lube oil cooler
pressurize the lube oil system
top off the expansion tank
第5题：
to be kept
logged
changed
has remained
第6题：
In an auxiliary diesel engine bypass type lubricating oil system, the main lube oil pump forces_______ .
A.all of the oil used by the engine through a filter
B.some of the oil used by the engine through a filter
C.some of the oil used by the engine through a centrifuge
D.all of the oil used by the engine through a centrifuge
第7题：
runs out of fuel
has low lubricating oil pressure
exceeds a set maximum speed
has high cooling water temperature
第8题：
On a medium-speed main propulsion diesel engine, the crank-pin or crank journalbearings receive lubricating oil from( ).
A.a spindle lubricator
B.an oil jet
C.internal splashing
D.drilled passages in the crankshaft
第9题：
clogged lube oil piping
excessive valve-guide clearance
high lube oil viscosity
low lube oil temperature
第10题：
filter to remove the fuel oil
use the settler to remove the fuel oil
remove the fuel oil by centrifuging
drain and then renew the lube oil supply