compression pressures are below normal
lube oil is diluted with fuel oil
cranking speed is too low
exhaust system is partially restricted
第1题：
principle
principal
cause
case
第2题：
low air charge temperature
high cranking speed
excessive fuel dilution of lube oil
high compression pressure
第3题：
If the diesel engine fuel injection timing is changed to delay the start of injection until the pistons are at top dead center, the engine will_________.
A.backfire through the air intakes
B.develop less power under load
C.have high firing pressures
D.lift its cylinder relief valves
第4题：
low compression temperature
low ambient air pressure
high lube oil pump pressure
high fuel oil booster pump pressure
第5题：
most critical in a four-stroke cycle diesel engine
most critical in a two-stroke/cycle diesel engine
most critical in a four-stroke/cycle diesel engine if it is turbocharged
of equal importance in a two-stroke/cycle diesel engine as in a four-stroke/cycle diesel engine
第6题：
in which
on which
at which
in that
第7题：
fuel must be preheated
intake air should be preheated
lube oil outlet temperature should be increased 20℃ above normal
none of the above
第8题：
Cold weather starting of a diesel engine is more difficult than warm weather starting due to
A.use of low viscosity oil in cold weather
B.increased moisture content of inlet air in cold weather
C.increased drag of pistons and bearings due to increased oil viscosity
D.higher compression pressures reached due to smaller clearances existing in the engine during cold weather
第9题：
turn engine with jacking gear
drain filters and strainers and bleed off water at each injection pump
use ether to start the engine with blow-down valves open
blow through the cylinders and fuel lines with a drying agent
第10题：
fuel lines
lube oil filter
crank case pump
rocker arm reservoir