suppressant additive
dispersant additive
extreme pressure additive
viscosity improver additive
第1题：
If a used lube oil analysis indicates excessive chromate content, this means
A.air filtration is inadequate
B.engine coolant is leaking into the lube oil
C.fuel oil is leaking into the lube oil
D.the piston rings are excessive worn
第2题：
Which lubricating oil additive is used in diesel engines to reduce the tendency(倾向)for sludge and varnish to form on the engine parts?
A.Flash point improvers
B.Pour point improvers
C.Inhibitors
D.Foam suppressors(抑制物)
第3题：
An additive used to improve the ability of a lube oil to reduce friction is known as a/an
A.suppressant additive
B.dispersant additive
C.extreme pressure additive
D.viscosity improver additive
第4题：
clogged lube oil piping
excessive valve-guide clearance
high lube oil viscosity
low lube oil temperature
第5题：
the filter to operate more efficiently
the lube oil cooler to be bypassed
positive lube oil pump suction to be assured
galvanic action in the cooler to be minimized
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：
crankcase
low lube oil temperature
excessive oil consumption
low bearing oil pressure
第8题：
Lubrication for the main reduction gears used with diesel engines is usually supplied by
A.oil from the main engine sump
B.an independent lube oil system
C.the stern bearing head tank
D.the stem bearing sump tank
第9题：
acid
fuel oil
sediment
water
第10题：
an increased flash point
higher lube oil pressures
an increased viscosity
lower lube oil pressures