海船船员考试
单选题The exhaust system for a turbocharged diesel engine functions to （）A power the after-coolersB power the turbochargerC reduce the cylinder scavenge effectD cool the turbocharger
题目
power the after-coolers
power the turbocharger
reduce the cylinder scavenge effect
cool the turbocharger
参考答案和解析
相似问题和答案
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：
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
解析：decrease：减少;clearance：间隙
译文：喷油定时过早会引起柴油机爆炸压力偏高、排温偏低。
第4题：
over-speeding of the engine
failure of the engine to shut down
no effect of engine mounting bolts
high exhaust temperatures
第5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6题：
During the valve overlap period, the exhaust pressure of a turbocharged four-stroke/cycle diesel engine must be less than the intake manifold pressure to ensure ______.
A.effective cylinder scavenging and cooling
B.constant pressure from the turbochargers
C.cooler operation of the exhaust system
D.effective constant pressure for turbocharger operation
第7题：
increase the density of the intake air
decrease turbocharger power usage
reduce exhaust gas temperature
compensate for turbocharger PRM fluctuations
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：
air binding of the engine cooling system
a cracked water cooled exhaust manifold
blockage in the heat exchanger
faulty operation of the thermostat
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