海船船员考试
单选题The primary duty of lube oil is to reduce （） between the working parts of an engine.A power outputB friction and wearC indicated pressureD rated horsepower
题目
power output
friction and wear
indicated pressure
rated horsepower
相似问题和答案
第1题：
crankcase
low lube oil temperature
excessive oil consumption
low bearing oil pressure
第2题：
open the filter and inspect the elements
check the lube oil pump discharge pressure
check the lube oil header pressure
check the pressure drop across the filter
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：
lube oil pump suction line
lube oil pump discharge line
bottom of the lube oil sump
outlet from the lube oil header
第5题：
acid
fuel oil
sediment
water
第6题：
excessive crankcase pressure
excessive lube oil temperature
contamination of the lube oil by water
contamination of the cooling water by lube oil
第7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8题：
Sludge may be formed in the oil in the crankcase of a reciprocating air conditioning compressor as a result of ______.
A.refrigerant bubbles in the lube oil
B.refrigerant reducing the lube oil viscosity
C.oxidation(氧化) of the lube oil from overheating
D.reducing the floc or cloud point of the oil
第9题：
clogged lube oil piping
excessive valve-guide clearance
high lube oil viscosity
low lube oil temperature
第10题：
an increased flash point
higher lube oil pressures
an increased viscosity
lower lube oil pressures