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)
What is LEAST likely to cause ignition of fuel vapors ________.
A.Static electricity
B.An open running electric motor
C.Loose wiring
D.Explosion proof lights
参考答案
更多 “ What is LEAST likely to cause ignition of fuel vapors ________.A.Static electricityB.An open running electric motorC.Loose wiringD.Explosion proof lights ” 相关考题
考题
Your ERX Edge Router is constantly going to a boot prompt.What is the most likely cause for this condition?()
A.AB.BC.CD.D
考题
A booting system appears to be hanging with an LED code of 0c54. What is the likely cause?()
A.An AIX install is in progress.B.The rootvg volume group is corrupt.C.The TCPIP configuration is incorrect.D.At least one paging device cannot be varied on.
考题
Which of the following is least likely to cause the ignition of fuel vapors?A.Static electricityB.An open running electric motorC.Loose wiringD.Explosion proof lights
考题
Fuel has been injected but ignition fails. The possible cause may be ______.A.slightly leaky exhaust valveB.increased scavenging air temperatureC.engine cylinders not scavenged sufficientlyD.too much water in the fuel oil
考题
What is NOT a requirement for the preparation of used,gasoline-propelled cars if they are to be carried as ordinary cargo and not as hazardous cargo ________.A.The engine must be run until it dies from lack of fuelB.The fuel tank must be inerted with CO2C.The ignition key may not be in the ignitionD.The vehicle must be inspected for fuel leaks
考题
Foam extinguishes a fire by ______.A.shutting off the air supplyB.cooling the fuel to below ignition temperatureC.dispersing the fuelD.removing the source of ignition
考题
A booting system appears to be hanging with an LED code of 0c54. What is the likely cause?()A、An AIX install is in progress.B、The rootvg volume group is corrupt.C、The TCPIP configuration is incorrect.D、At least one paging device cannot be varied on.
考题
单选题Combustion knock will most likely occur as a result of using a fuel with()A
low ignition qualityB
a high volatilityC
low ignition delayD
a high cetane number
考题
单选题Mist detectors used on large low-speed main propulsion diesel engines monitor and check for the presence of ().A
fuel oil vapor at the sludge tank ventB
unburned fuel vapors in the scavenge air receiverC
lube oil vapors in the crank caseD
lube oil vapors in the engine room
考题
单选题The purpose of the programmed purge cycle on an automatically fired auxiliary boiler is to()A
cool the furnace to prevent pre-ignitionB
remove explosive vapors from the furnaceC
evaporate accumulated unburned fuel oilD
provide sufficient air in the furnace to allow ignition of the fuel
考题
单选题The primary method by which water spray puts out fires is by().A
removing the oxygenB
cooling the fire below the ignition temperatureC
removing combustible materialD
diluting combustible vapors
考题
单选题For a given fuel, a change in the compression ratio will affect the ignition lag by which of the listed means?()A
An increase in compression ratio will increase the ignition lagB
An increase in compression ratio will decrease the ignition lagC
A decrease in compression ratio will decrease the ignition lagD
A decrease in ignition lag will increase the compression ratio
考题
单选题The ignition quality of diesel fuel is indicated by its()A
octane numberB
cetane numberC
viscosity in Saybolt secondsD
air fuel ratio
考题
单选题Diesel fuel vapors ().A
can not be ignited by a spark unless the vapor is in a confined spaceB
are nontoxic in all concentrationsC
can not be ignited by a spark unless they are at their auto-ignition temperatureD
are heavier than air
考题
单选题Combustion knock occurring in a diesel engine can be caused by ().A
excessive fuel penetrationB
prolonged injection lagC
reduced ignition lagD
prolonged ignition lag
考题
单选题If the diesel fuel vapors present are within the flammable range ().A
the vapor air mixture is too rich to burnB
an explosion may occur if a source of ignition is presentC
the vapor air mixture is too lean to bum the upper explosiveD
limit has been exceeded
考题
单选题Which of the following statements is least likely to cause the ignition of fuel vapors?()A
Static electricityB
An open running electric motorC
Loose wiringD
Explosion proof lights
考题
单选题A booting system appears to be hanging with an LED code of 0c54. What is the likely cause?()A
An AIX install is in progress.B
The rootvg volume group is corrupt.C
The TCPIP configuration is incorrect.D
At least one paging device cannot be varied on.
考题
单选题A diesel engine will lose power if fuel injection occurs too late in the cycle, because the()A
fuel droplets will burn as they leave the fuel injectorB
fuel will not be properly atomized in the cylinderC
maximum expansion of the burned fuel cannot take place in the cylinderD
compression pressure will be too low to cause fuel ignition
考题
单选题Foam extinguishes a fire by().A
shutting off the air supplyB
cooling the fuel to below ignition temperatureC
dispersing the fuelD
removing the source of ignition
考题
单选题Which may ignite fuel vapors?()A
Static electricityB
An open and running motorC
Loose wiringD
All of the above
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Fuel has been injected but ignition fails The possible cause may be ().A
leaky exhaust valveB
increased scavenging air temperatureC
engine cylinders not scavenged sufficientlyD
water in the fuel oil
考题
单选题The vapors given off by heated fuel oil are heavier than air and are().A
odorlessB
explosiveC
nontoxicD
visible
考题
单选题Which statement is TRUE concerning fuel vapors on a vessel().A
Fuel vapors gather in the lowest portions of the vesselB
Fuel vapors can only be ignited by an open flameC
Vent outlets should be located above the level of the carburetor air intakeD
None of the above
考题
单选题What is LEAST likely to cause ignition of fuel vapors?().A
Static electricityB
An open running electric motorC
Loose wiringD
Explosion proof lights
热门标签
最新试卷