oil foaming will occur
large quantities of oil are consumed
lube oil viscosity is always decreased
corrosive by-products are usually formed
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：
The oil components including polar compounds formed as a result of oxidation of some oil fractions in the marine environment dissolving in seawater defines ______．
A.Oxidation and destruction
B.Dissolution
C.Oxidation and destruction
D.Sedimentation
第3题：
A.high fuel oil viscosity
B.low fuel oil temperature
C.high lube oil viscosity
D.energized alow plugs
第4题：
an increased flash point
higher lube oil pressures
an increased viscosity
lower lube oil pressures
第5题：
pitting
sludge
hard varnish
all of the above
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：
crankcase
low lube oil temperature
excessive oil consumption
low bearing oil pressure
第8题：
Oil oxidation as a result of excessively high lube oil temperature, is harmful to a diesel engine Because
A.oil foaming will always occur
B.large quantities of oil are consumed
C.lube oil viscosity is always decreased
D.corrosive by-products are usually formed
第9题：
a dirty lube oil strainer
internal water leaks
an oil suction line restriction
excessive wears of the cooling water pump
第10题：
high fuel oil viscosity
low fuel oil temperature
high lube oil viscosity
energized glow plugs