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
Which of the following is least likely to cause the ignition of fuel vapors?
A.Static electricity
B.An open running electric motor
C.Loose wiring
D.Explosion proof lights
相关考题：
Which of the following represents the significance the fuel oil cetane number?A.The cetane number has no affect on injection lagB.The cetane number is an indication of the fuel's viscosityC.Ignition lag is reduced with fuels having a high cetane numberD.The cetane number is of little significance in the combustion process
What is LEAST likely to cause ignition of fuel vapors ________．A.Static electricityB.An open running electric motorC.Loose wiringD.Explosion proof lights
Which of the following bottlenecks would MOST likely cause excessive hard drive activity?（）A、Inadequate RAMB、Slow processorC、PCI busD、Excessive network traffic
Which of the following is the MOST likely to cause a server power supply fan to fail but allows the power supply to still be functional？（）A、DustB、Power SurgeC、Excessive humidityD、High temperatures
Which of the following components could MOST likely cause Mike, a technician, to receive a ‘Nonsystem disk or disk error’ after POST?（）A、Bad memoryB、Video cardC、Faulty chipsetD、FDD
Which of the following types of media would MOST likely cause above normal amounts of machine jamming？（）A、EnvelopesB、Colored mediaC、LetterheadD、Pre punched
Which of the following will MOST likely cause major performance issues on an email server？（）A、 RAID 0 configurationB、 PBX softwareC、 DHCP serverD、 Anti-virus software
When troubleshooting hardware issues with a server， which of the following is MOST likely to cause a problem in receiving vendor support？（）A、 Third party cablesB、 Third party memoryC、 Signed driversD、 Server type
Which of the following display types is likely to draw the LEAST amount of power?（）A、LCDB、LEDC、CRTD、Plasma
单选题Combustion knock will most likely occur as a result of using a fuel with（）Alow ignition qualityBa high volatilityClow ignition delayDa high cetane number
单选题The purpose of the programmed purge cycle on an automatically fired auxiliary boiler is to（）Acool the furnace to prevent pre-ignitionBremove explosive vapors from the furnaceCevaporate accumulated unburned fuel oilDprovide sufficient air in the furnace to allow ignition of the fuel
单选题Which of the following statements is true concerning the cetane number rating of diesel fuel? （）AThe cetane number is obtained by comparing the fuel with cetane a colorless liquid hydrocarbonBThe higher the cetane number, the shorter the ignition lagCThe highest cetane number of fuel is 100DAll of the above
单选题Which of the following conditions could be a cause of excessive fuel dilution of diesel engine lube oil?（）ALeaking fuel injectorsBLower than normal compressionCDelayed fuel injectionDAll of the above are correct
单选题The lowest temperature at which fuel combustion becomes self-sustaining in the presence of a source of ignition, is defined as the （）Aauto-ignition pointBflash pointCburning temperatureDfire point
单选题The primary method by which water spray puts out fires is by（）.Aremoving the oxygenBcooling the fire below the ignition temperatureCremoving combustible materialDdiluting combustible vapors
单选题Which of the following statements is correct concerning the “flash point ” of a liquid?（）AIt is lower than the ignition temperatureBIt is the temperature at which a substance will spontaneously igniteCIt is the temperature at which a substance, when ignited, will continue to bumDIt is the temperature at which the released vapors will fall within the explosive range
单选题Diesel fuel vapors （）.Acan not be ignited by a spark unless the vapor is in a confined spaceBare nontoxic in all concentrationsCcan not be ignited by a spark unless they are at their auto-ignition temperatureDare heavier than air
单选题Which of the following statements is least likely to cause the ignition of fuel vapors?（）AStatic electricityBAn open running electric motorCLoose wiringDExplosion proof lights
单选题A diesel engine will lose power if fuel injection occurs too late in the cycle, because the（）Afuel droplets will burn as they leave the fuel injectorBfuel will not be properly atomized in the cylinderCmaximum expansion of the burned fuel cannot take place in the cylinderDcompression pressure will be too low to cause fuel ignition
单选题Which may ignite fuel vapors?（）AStatic electricityBAn open and running motorCLoose wiringDAll of the above
单选题Fuel has been injected but ignition fails The possible cause may be （）.Aleaky exhaust valveBincreased scavenging air temperatureCengine cylinders not scavenged sufficientlyDwater in the fuel oil
单选题Which statement is TRUE concerning fuel vapors on a vessel（）.AFuel vapors gather in the lowest portions of the vesselBFuel vapors can only be ignited by an open flameCVent outlets should be located above the level of the carburetor air intakeDNone of the above
单选题What is LEAST likely to cause ignition of fuel vapors?（）.AStatic electricityBAn open running electric motorCLoose wiringDExplosion proof lights