the water produced during combustion
the sulfur in the fuel
unburned fuel oil
all of the above
第1题：
lube cooler failure
poor heat transfer
mechanical lubricator failure
camshaft seizure
第2题：
increasing the quantity of starting air
increasing the lube oil pressure
heating the engine fuel supply
heating the engine jacket water
第3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4题：
Dirty lube oil filter
Too much piston ring wear
High lube oil viscosity
Low lube oil temperature
第5题：
pitting
sludge
hard varnish
all of the above
第6题：
contaminated with sludge
contaminated with carbon
diluted with fuel oil
diluted with water
第7题：
decreased compression pressure
increased lube oil pressure
lower lube oil temperature
excessive leakage past the piston rings
第8题：
low lube oil temperature
low lube oil pressure
high exhaust temperature
high cooling water pressure
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：
clogged lube oil piping
excessive valve-guide clearance
high lube oil viscosity
low lube oil temperature