high lube oil temperature
blue smoke
the engine to stop
piston seizure
第1题：
If the engine does start on air, but combustion does not immediately begin, the cause may be _____.
A.failure of the fuel pumps
B.starting air pressure too low
C.stop valve in air line closed
D.the turning gear still engaged
第2题：
water in the fuel
cold lube oil
excessive starting air pressure
excessive fuel pressure
第3题：
Ventilation ().
A、is a system for moving fresh air
B、can cut indoor pollution to a safe level
C、can cause some diseases
D、is better done through air-conditioning
第4题：
a shortened ignition delay period
a lean fuel/air mixture
excess fuel in the combustion chamber
rapid vaporization of injected fuel droplets
第5题：
sluggish response
speed droop variations
isochronous governing
sensitivity increase
第6题：
Fuel has been injected but ignition fails. The possible cause may be ______.
A.slightly leaky exhaust valve
B.increased scavenging air temperature
C.engine cylinders not scavenged sufficiently
D.too much water in the fuel oil
第7题：
low lube oil temperature
low starting air temperature
air in the fuel injection
water in the starting air system
第8题：
_______can be a direct cause of faulty operation of diesel engine fuel injection nozzles.
A.Excessive fuel nozzle holder cooling
B.Sediment in the fuel supply
C.Distortion of the fuel spray pattern
D.Improper atomization of the fuel
第9题：
a leaking fuel injector nozzle
a clogged air filter
excessively early fuel injection
malfunctioning valves
第10题：
ignition failure
oxygen corrosion of the fuel lines
the pistons to seize
blue smoke