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 填空题What was the probable cause of the fire?Most likely a burning ____.

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