By piping in more oxygen for ethanol.
By sensing the amount of oxygen in a car’s exhaust.
By burning in a less-than-optimal mode.
By stopping and checking the fuel tank.
第1题：
How does foam extinguish an oil fire ?______.
A.By cooling the oil below the ignition temperature
B.By removing the fuel souce from the fire
C.By excluding the oxygen from the fire
D.By increasing the weight of the oil
第2题：
increase thermal efficiency
cause clogging of the fuel system
increase the ability of the engine to start in cold weather
produce corrosion in the cylinder and exhaust system at low loads
第3题：
In the experiment, the burning inside the bottle can___.
A. equalize the air pressure inside and outside
B. make a seal in the neck of the bottle
C. finish up the oxygen inside the bottle
D. produce more oxygen inside the bottle
第4题：
feel the high pressure fuel line
check the cylinder exhausts for white smoke frequently
check the cylinder exhaust temperature
isolate each cylinder and inspect the injector
第5题：
clogged fuel injection pumps
increased cylinder liner wear
intake valve stem corrosion
varnish deposit on pistons
第6题：
By cooling the oil below the ignition temperature
By removing the fuel source from the fire
By excluding the oxygen from the fire
By increasing the weight of the oil
第7题：
corrosion and grooving of exhaust valves
corrosion and gumming of the fuel injection pump
salt deposits in the exhaust manifold
slag deposits in the fuel injection equipment
第8题：
Using an inert gas system on a tanker has which advantage（s）________．
A.Provides for faster loading
B.Lowers oxygen content in the tank
C.Provides better fuel economy
D.All of the above
第9题：
Provides for faster loading
Lowers oxygen content in the tank
Provides better fuel economy
All of the above
第10题：
the burning
the fuel
the air charge
the engine piston