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
As for a diesel engine, lack of combustion air may be due to （）.
A
fouling turbine
B
fuel pump faults
C
lubrication failure
D
excessive cooling
参考答案
参考解析
解析：
暂无解析
更多 “单选题As for a diesel engine, lack of combustion air may be due to （）.A fouling turbineB fuel pump faultsC lubrication failureD excessive cooling” 相关考题
考题
If the engine does not start on air, it may be due toA.low compression of the fuel pumpsB.incorrect timing of fuel pumpsC.the starting air valves stuckD.air-locks in fuel oil pipeline
考题
If the engine does start on air, but combustion does not immediately begin, the cause may be _____.A.failure of the fuel pumpsB.starting air pressure too lowC.stop valve in air line closedD.the turning gear still engaged
考题
How does combustion air enter the cylinder of a two-cycle diesel engine ? Through _______．A.Cylinder head valvesB.PortsC.Turbo chargersD.Bleeder valves
考题
单选题Black smoke exhausting from an operating diesel engine is an indication of poor combustion which may be caused by （）A
water in the fuelB
insufficient fuel for combustionC
clogged air intake passagesD
burning lubricating oil
考题
单选题White smoke exhausting from an operating diesel engine may indicate （）.A
a cracked linerB
burning lube oilC
an overloaded engineD
insufficient combustion air
考题
单选题Combustion knock can occur in the cylinders of a diesel engine under any condition permitting （）.A
a shortened ignition delay periodB
a lean fuel/air mixtureC
excess fuel in the combustion chamberD
rapid vaporization of injected fuel droplets
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 temperature
考题
单选题Diesel engine starting difficulties due to cold intake air temperatures, can be overcome by using a/an（）A
increase in starting air pressureB
increase in lube oil viscosityC
compression expansion deviceD
jacket water heater
考题
单选题A diesel engine may fail to start due to （）A
low air charge temperatureB
high cranking speedC
excessive fuel dilution of lube oilD
high compression pressure
考题
单选题The power developed by a large slow-speed main propulsion diesel engine is dependent upon the （）A
quantity of air it takes in and retains in the cylinders during a given time periodB
proportion of trapped air that is utilized in the combustion processC
thermodynamic efficiency of the engine cycleD
all of the above
考题
单选题An auxiliary diesel engine may fail to start due to（）A
low exhaust back pressureB
high lube oil temperatureC
insufficient cranking speedD
excessive fuel atomization
考题
单选题In describing basic diesel engine operation，the term ‘event’ refers to （）A
the production of high pressure gasesB
the removal of expended combustion gasesC
the admission of air to the cylinderD
all of the above
考题
单选题The term diesel engine scavenging means（）A
delivering more air into the cylinder than it would normally receive during an ordinary charging processB
forcing the products of combustion out of the cylinder with the fresh air chargeC
collecting the air charge at the cleanerD
combustion and expansion of hot gas
考题
单选题If the engine does start on air, but combustion does not immediately begin, the cause may not be （）.A
low compressionB
failure of the fuel pump to discharge fuelC
incorrect timing of fuel pumpD
turning gear being still on
考题
单选题Cold weather starting of a diesel engine is more difficult than warm weather starting due to（）A
use of low viscosity oil in cold weatherB
increased moisture content of inlet air in cold weatherC
increased drag of pistons and bearings due to increased oil viscosityD
higher compression pressures reached due to smaller clearances existing in the engine during cold weather
考题
单选题The diesel engine is a type of internal combustion engine which ignites the fuel by injecting it into hot, high pressure air in a （）.A
air bottleB
air compressorC
crank caseD
combustion chamber
考题
单选题If water is found in the crankcase of a diesel engine, the cause may be due to（）A
a cracked cylinder headB
a leaky cylinder head gasketC
a cracked cylinder linerD
any of the above
考题
单选题If the engine does not start on air, it may be due to （）A
low compression of the fuel pumpsB
incorrect timing of fuel pumpsC
the starting air valves stuckD
air-locks in fuel oil pipeline
考题
单选题How does combustion air enter the cylinder of a two-cycle diesel engine?（）A
Cylinder head valvesB
PortsC
Turbo chargersD
Bleeder valves
考题
单选题An automated diesel engine should normally shut down due to （）A
low lube oil temperatureB
high ambient air temperatureC
low tube oil pressureD
high exhaust system back pressure
考题
单选题If the engine does start on air, but combustion does not immediately begin, the cause may be （）.A
failure of the fuel pumpsB
starting air pressure too lowC
stop valve in air line closedD
the turning gear still engaged
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A restricted air intake to a diesel engine may result in the engine （）.A
failing to reach rated speedB
knocking under maximum loadC
hunting or surging under light loadD
overspeeding and running away
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When starting air is admitted, a diesel engine turns over very slowly without firingThe cause may be （）A
an obstruction in an cylinderB
water accumulation in some engine cylindersC
low starting air pressureD
low scavenge air pressure
考题
单选题Fuel droplets injected into a diesel engine cylinder must have adequate penetration to （）A
prolong the ignition delay periodB
ensure the beginning of fuel injectionC
thoroughly utilize the air chargeD
allow controlled fuel combustion
考题
单选题The diesel engine is a type of （）.A
turbine engineB
gas turbineC
steam engineD
internal combustion engine
热门标签
最新试卷