海船船员考试
单选题To determine if the lube oil filter elements need changing, （）.A open the filter and inspect the elementsB check the lube oil pump discharge pressureC check the lube oil header pressureD check the pressure drop across the filter
题目
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
相似问题和答案
第1题：
A dirty diesel engine oil filter element can best be detected by ______.
A.visual inspection of the elements
B.the pressure drop across the filter
C.high lube oil sump temperature
D.decrease in oil viscosity from the filter
第2题：
crankcase
low lube oil temperature
excessive oil consumption
low bearing oil pressure
第3题：
The pressure differential across a diesel engine lube oil system duplex filter should be checked to ________.
A.determine the need for filter cleaning
B.measure any change in oil viscosity
C.prevent damage to the filter
D.determine the need for batch filtration
第4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5题：
excessive crankcase pressure
excessive lube oil temperature
contamination of the lube oil by water
contamination of the cooling water by lube oil
第6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7题：
visual inspection of the elements
the pressure drop across the filter
high lube oil sump temperature
decrease in oil viscosity from the filter
第8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9题：
when
how
where
whether
第10题：
acid
fuel oil
sediment
water