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
Performance of a turbocharged engine can be improved by（）
A
decreasing the amount of valve overlap
B
preheating the air intake
C
after-cooling the intake air
D
preheating light fuel
参考答案
参考解析
解析：
暂无解析
更多 “单选题Performance of a turbocharged engine can be improved by（）A decreasing the amount of valve overlapB preheating the air intakeC after-cooling the intake airD preheating light fuel” 相关考题
考题
(b) The management of Division C has identified the need to achieve cost savings in order to become morecompetitive. They have decided that an analysis and investigation of quality costs into four sub-categories willprovide a focus for performance measurement and improvement.Required:Identify the FOUR sub-categories into which quality costs can be analysed and provide examples (whichmust relate to Division C) of each of the four sub-categories of quality cost that can be investigated in orderthat overall cost savings might be achieved and hence the performance improved. (8 marks)
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
The Business Partner technical specialist is called to determine if the addition of host ports on an IBM System Storage DS8700 has improved users’ response times for an IBM System p server running SAP. How can the improvement be verified（）A、check the output of the "vmstat" command on LINUXB、check the performance reports via Tivoli Storage Productivity Center for DataC、check the performance reports via Tivoli Storage Productivity Center for DiskD、check the output of the "iostat" command on AIX
考题
Which storage subsystem can place files from the same directory in different storage poolsautomatically for improved performance?（）A、 XIV system B、 SONAS C、 DS5300 D、 DS8700
考题
A customer is unsure how POWER7 processors can outperform POWER6 processors when the clock speeds are slower. What contributes to the improved performance?（）A、Added Turbo memory switchingB、Removed internal OLTP limitsC、Moved L3 cache onto the chipD、Increased DDR2 memory speeds
考题
Which two are benefits of fully encapsulating a class？（） A、 Performance of class methods is improved.B、 Implementation details of the class are hidden.C、 Access modifiers can be omitted on class data members.D、 Code that uses the encapsulation class can access data members directly.E、 Internal operation of the class can be modified without impacting clients of that class.
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 main advantage of improved Simplex tailshaft seal are（）A
the good sealing performance and the simple structureB
the good sealing performance and the short life expectancyC
the good sealing performance but the short life expectancyD
the good sealing performance and the lower cost
考题
单选题Which storage subsystem can place files from the same directory in different storage poolsautomatically for improved performance?（）A
XIV system B
SONAS C
DS5300 D
DS8700
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High exhaust temperatures from all of cylinder of a turbocharged, four-stroke/cycle diesel engine can be caused by an（）A
inoperative turbochargerB
inadequate fuel supplyC
overload on one cylinderD
unequal load distribution
考题
单选题In a closed cooling system for a turbocharged, four-stroke/cycle diesel engine, fluctuating water pressure can be caused by （）A
improper venting of the cooling systemB
carrying the expansion tank water level too highC
a totally clogged impeller in the cooling water pumpD
an incorrectly set cooling system temperature control
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Which of the following problems can cause an above normal air temperature to develop in the intake manifold of a turbocharged and after-cooled diesel engine?（）A
Faulty turbocharger turbine diffuser ringB
Faulty turbocharger compressor ringC
Insufficient cooling water flowD
Clogged air intake filters
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
考题
单选题One of the differences between a two-stroke engine and a four-stroke engine is,（）A
a two-stroke engine can’t work without cylindersB
a two-stroke engine can’t work without pistonsC
a two-stroke engine can’t work without crankshaftsD
a two-stroke engine can’t work without a blower
热门标签
最新试卷
