provide exhaust back pressure
prevent exhaust smoke emissions
power a reciprocating supercharger
muffle exhaust gas noise
第1题：
The relative air pressure in the inlet manifold of a turbocharged diesel engine is usually______.
A.greater than the average exhaust manifold pressure
B.less than the average exhaust manifold pressure
C.greater at the turbine wheel than at the impeller
D.greater at reduced engine speed
第2题：
camshaft beatings
main bearings
piston crowns
cylinder walls
第3题：
High firing pressures and low exhaust temperature in a diesel engine may resultfrom( ).
A.decreased piston to cylinder head clearance
B.increased exhaust system back pressure
C.early fuel injection timing
D.low scavenge air temperature
第4题：
changing the direction of exhaust gas flow
increasing the exhaust gas velocity
changing the exhaust gas weight
increasing the exhaust gas static pressure
第5题：
air binding of the engine cooling system
a cracked water cooled exhaust manifold
blockage in the heat exchanger
faulty operation of the thermostat
第6题：
A bypass line provided around a waste heat auxiliary boiler in a diesel engine exhaust system, may be used to avoid boiler ______.
A.corrosion at low engine loads
B.erosion at high engine loads
C.overload at high engine loads
D.scaling at all exhaust temperatures
第7题：
passing the exhaust through long head pipes
diffusing exhaust vibrations through activated carbon baffles
increasing the exhaust gas velocity
reducing the exhaust gas velocity
第8题：
What is the function of the after-coolers installed in the diesel engine air intake system?
A.Decrease the air density
B.Increase the exhaust temperature
C.Decrease the lube oil temperature
D.Increase the air density
第9题：
over-speeding of the engine
failure of the engine to shut down
no effect of engine mounting bolts
high exhaust temperatures
第10题：
testing for the mechanical load and the thermal load
inspecting thermal and mechanical condition of the engine
inspecting each system and exhaust temperature
testing for compress pressure and explosion pressure