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
The power output of a turbocharged diesel engine will drop if the cooling water flow through the after-cooler is interrupted because the （）.
A
turbocharger stalls
B
exhaust pressure increases
C
air charge density decreases
D
scavenge effect increases
参考答案
参考解析
解析：
暂无解析
更多 “单选题The power output of a turbocharged diesel engine will drop if the cooling water flow through the after-cooler is interrupted because the （）.A turbocharger stallsB exhaust pressure increasesC air charge density decreasesD scavenge effect increases” 相关考题
考题
A sudden power loss from a turbocharged and after-cooled diesel engine is an indication of a/anA.turbocharger malfunction or failureB.crankcase exhauster overloadC.overload on the intercoolerD.obstruction in the engine cylinders
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
单选题To meet the market requirements, a marine diesel engine should not be of（）A
big sizeB
fuel economyC
low speedD
high power
考题
单选题As a heat engine,（） energy is the source of power by which the diesel engine can be operated.A
electricB
heatC
mechanicalD
exhaust
考题
单选题The diesel engine consumes considerably less fuel than the steam engine for equal output, （） enables a motor-ship to load more cargo.A
whyB
whichC
in whichD
on which
考题
单选题Charging-air pressure increases if there is incorrect combustion and drop in the （） of the diesel engine.A
machine efficiencyB
machinery efficiencyC
mechanical efficiencyD
mechanics efficiency
考题
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
考题
单选题The exhaust system for a turbocharged two-stroke/cycle diesel engine functions to（）A
discharge exhaust gases and smokeB
furnish energy to the turbochargerC
reduce engine room noiseD
all of the above
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Cooling the intake air supplied to a diesel engine will （）.A
reduce mean effective pressureB
decrease average compression pressureC
decrease air charge densityD
increase power output
考题
单选题Proper atomization of fuel in diesel engine combustion chambers will （）.A
affect the injection pressureB
improve combustionC
reduce compression pressureD
decrease power output
考题
单选题The purpose of the flywheel of a diesel engine is to （）.A
counterbalance the crank throws on the crankshaftB
keep the engine running smoothly between power strokeC
provide a belt-driving surface for the operation of auxiliary machineryD
prevent the engine from overspeeding
考题
单选题Clearance volume scavenging in a turbocharged, four-stroke/cycle diesel engine is accomplished （）.A
during the valve overlap periodB
with only the exhaust valve openC
at a pressure below atmosphericD
without cooling the cylinders or pistons
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An increase in the load on a turbocharged diesel engine operating at constant speed will result in an increase in （）A
exhaustB
air box pressureC
brake main effective pressureD
all of the above
考题
单选题A distorted spray pattern from a fuel injector can cause a diesel engine to have （）A
higher firing pressureB
more power outputC
lower fuel pressureD
less power output
考题
单选题Significant retardation of a diesel engine fuel injection timing will result in （）A
smoother engine operationB
advanced fuel ignitionC
increased fuel economyD
reduced engine power
考题
单选题A sudden power loss from a turbocharged and after-cooled diesel engine is an indication of a/an（）A
turbocharger malfunction or failureB
crankcase exhauster overloadC
overload on the intercoolerD
obstruction in the engine cylinders
考题
单选题Poor quality fuel being used in a turbocharged medium-speed, diesel engine could result in （）A
hard startingB
excessive fuel consumptionC
loss of powerD
all of the above
考题
单选题An operating turbocharged diesel engine that suddenly loses power, is due to a/an（）A
restricted turbocharger air intakeB
oil leak into the turbochargerC
dribbling injectorD
low fuel viscosity
考题
单选题After-cooling of a turbocharged diesel engine will result in （）A
higher torque but lower brake horsepowerB
lower torque but higher brake horsepowerC
higher torque and lower brake horsepowerD
lower torque and higher brake horsepower
考题
单选题For a given size engine, the two-stroke/cycle diesel engine will deliver more power than a four-stroke/cycle diesel engine because （）.A
it has a longer power strokeB
more air gets into the cylinder each strokeC
it develops twice as many power strokes at the same speedD
higher combustion pressure is developed
考题
单选题The heart of the diesel engine is the （） where the fuel is burnt and the power developed.A
crankcaseB
cylinderC
scavenge boxD
piston
考题
单选题If the speed of a turbocharged diesel engine is maintained constant the turbocharger speed will （）A
decrease until the engine speed increasesB
increase as the load increasesC
decrease as the loadD
increases remain unchanged
考题
单选题In a main propulsion turbocharged diesel engine, the speed of the turbocharger varies according to the （）A
governor droopB
speeder spring tensionC
fuel rack lagD
load on the engine
考题
单选题When the load is increased on a turbocharged diesel engine, the amount of increased air supplied by the turbocharger will（）A
lag behind the increased fuel supplied to the engineB
enter the engine along with the increase in the fuelC
enter the engine before the increased fuel supplyD
leave the turbocharger as a negative pulse
考题
单选题A turbocharged, four-stroke/cycle diesel engine has a larger valve overlap than a naturally aspirated four-stroke/cycle diesel engine, in order to in crease the （）.A
temperature of the exhaust gasesB
energy supplied to the turbochargerC
air pressure to the intake manifoldD
purge of exhausted gases from the cylinders
考题
单选题Scavenging in a turbocharged, four-stroke/cycle diesel engine is accomplished（）A
during the valve overlap periodB
with only the exhaust valve openC
at a pressure below atmosphericD
without cooling the cylinders or pistons
热门标签
最新试卷