网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
单选题
An increase in the air inlet manifold pressure of a diesel engine will result in a/an （）.
A
decrease in maximum cylinder pressure
B
increase in ignition lag
C
decrease in fuel consumption per horsepower-hour
D
decrease in exhaust manifold pressure
参考答案
参考解析
解析：
暂无解析
更多 “单选题An increase in the air inlet manifold pressure of a diesel engine will result in a/an （）.A decrease in maximum cylinder pressureB increase in ignition lagC decrease in fuel consumption per horsepower-hourD decrease in exhaust manifold pressure” 相关考题
考题
If the exhaust gas temperature of the incinerator is too high, or if sparks are developed, What should you do?
A.Close the inlet and outletvalves for diesel oilB.Open the air nozzles in the secondary combustion chamber until it stopsC.Open the air nozzles in the primary combustion chamber until it stopsD.Close inlet valve for pressurized air
考题
What is the function of the after-coolers installed in the diesel engine air intake system?A.Decrease the air densityB.Increase the exhaust temperatureC.Decrease the lube oil temperatureD.Increase the air density
考题
The high air velocity leaving the compressor of an exhaust gas turbocharger is converted to pressure in the_______.A.inlet nozzle ringB.turbine wheel bladeC.diffuser passagesD.inlet volute
考题
Which of the following problems should be taken when cleaning the air filter on a diesel engine equipped with a turbocharger? .A.Reduce engine speed to idle before removing the filterB.Soak the dirty filter in kerosene onlyC.Blow out the air inlet with compressed airD.Cover the air inlet after removing the filter
考题
The relative air pressure in the inlet manifold of a turbocharged diesel engine is usually______.A.greater than the average exhaust manifold pressureB.less than the average exhaust manifold pressureC.greater at the turbine wheel than at the impellerD.greater at reduced engine speed
考题
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 coolingB.constant pressure from the turbochargersC.cooler operation of the exhaust systemD.effective constant pressure for turbocharger operation
考题
单选题A marine diesel engine is started by（）A
supplying high pressure oil into a hydraulic motorB
supplying high temperature air into the cylinderC
supplying high pressure air into the cylinderD
electrical igniting
考题
单选题Poor combustion in a diesel engine can be caused by （）.A
high compression pressureB
low intake air temperatureC
low exhaust pressureD
high scavenge air pressure
考题
单选题A substantial increase pressure could be an indication of a/an （）A
worn cylinder linerB
faulty cylinder relief valveC
excessive lube oil pressureD
excessive scavenge air pressure
考题
单选题Which of the following statements describes the function of an air compressor intake filter?（）A
Protects against suction valve floatB
Provides a positive pressure on the air inlet valvesC
Prevents lubricating oil contamination of the compressed air supplyD
Protects against the damaging effects of airborne solid particles
考题
单选题An increase in diesel engine crankcase pressure generally indicates excessive（）A
compression pressureB
lube oil header pressureC
scavenge air pressureD
piston ring blow-by
考题
单选题Which of the following statements is not true concerning symptom of a fire in the scavenge air box?（）A
an increase in the exhaust temperature of the affected cylinderB
the turbocharger may surgeC
the explosion pressure in all cylinders will rise violentlyD
smoke from the turbocharger air inlet filter will be seen
考题
单选题In a four-cycle diesel engine piston blow-by can result in increased（）A
crankcase pressureB
compression pressureC
scavenge pressureD
exhaust manifold pressure
考题
单选题What occurs in the combustion space of a diesel engine cylinder shortly after ignition and before the piston reaches TDC?（）A
Rapid increase in temperature with constant pressureB
Rapid increase in pressure with constant temperatureC
Rapid increase in pressure and temperatureD
Rapid increase in volume and decrease in pressure
考题
单选题A smoking exhaust from an operating diesel engine could be caused by （）A
low sulfur content in the fuelB
a loose injector inlet connectionC
late fuel injectionD
high injection pressure
考题
单选题The relative air pressure in the inlet manifold of a turbocharged diesel engine is usually（）A
greater than the average exhaust manifold pressureB
less than the average exhaust manifold pressureC
greater at the turbine wheel than at the impellerD
greater at reduced engine speed
考题
单选题During the valve overlap period, the exhaust pressure of a turbochargers, four-stroke/cycle diesel engine must be less than the intake manifold pressure to ensure （）A
effective cylinder scavenging and coolingB
constant pressure from the turbochargersC
cooler operation of the exhaust systemD
effective constant pressure for turbocharger operation
考题
单选题A turbocharged diesel engine will have an intake manifold pressure（）A
constantly decreasing as engine load increaseB
constantly increasing as the amount of supercharging increasesC
approximately equal to exhaust manifold pressure at all timesD
approximately equal to atmospheric pressure at all times
考题
单选题A naturally aspirated diesel engine at full throttle will have an intake manifold pressure （）A
slightly less than atmospheric pressureB
approximately equal to exhaust manifold pressure at all timesC
that is widely fluctuating constantlyD
decreasing as engine load increases
考题
单选题If cooling water flow through the after-cooler is interrupted,the power output of a turbocharged diesel engine will drop because the （）A
turbocharger will stallB
density of the air charge will decreaseC
scavenge effect will increaseD
exhaust pressure will increase
考题
单选题Which condition indicates the air side fouling of an after-cooler on a turbocharged diesel engine?（）A
An increased air temperature differential between the cooler inlet and outletB
A decrease in the air pressure differential across the coolerC
Excessive condensate forming in the air boxD
A decrease in the air temperature differential between the cooler inlet and outlet
考题
单选题Which of the following problems should be taken when cleaning the air filter on a diesel engine equipped with a turbocharger?（）A
Reduce engine speed to idle before removing the filterB
Soak the dirty filter in kerosene onlyC
Blow out the air inlet with compressed airD
Cover the air inlet after removing the filter
考题
单选题Which of the following conditions can cause below normal air pressure in the intake manifold of a turbocharged diesel engine?（）A
Excessive piston blow-by to the manifoldB
Insufficient cooling water flowC
Accumulated water in the air boxesD
Clogged air intake filters
考题
单选题On what do you depend having the air cooler of main engine chemically washed?（）A
increased air pressure differenced before and aft air coolerB
reduced exhaust temperature in all cylindersC
reduced temperature difference between water inlet and outletD
both A and C
考题
单选题Which of the following statements is correct regarding a turbocharged four-stroke/cycle diesel generator?（）A
At zero load the intake manifold pressure is greater than the exhaust manifold pressureB
At full load the intake manifold pressure and exhaust manifold pressure are equalC
At full load the intake manifold pressure is less than the exhaust manifold pressureD
At full load the intake manifold pressure is greater than the exhaust manifold pressure
考题
单选题In an operating diesel engine, which of the following condition is an indication of a leaking air starting valve?（）A
noise coming from that air starting valveB
continuous operation of the starting air compressorC
zero air pressure in the air starting systemD
overheated starting air pipe to the cylinder head
考题
单选题The timing of diesel engine air starting valves is controlled by（）A
the air start valve timing gears and rodsB
a cylinder check valveC
individual cams and valve gearD
an air manifold poppet valve
热门标签
最新试卷