Flame screens are used to ______.A.contain flammable fumesB.protect firefightiers from flamesC.prevent flames from entering tanksD.keep flame and sparks from getting out of an engine’s exhaust system
Flame screens are used to ______.
A.contain flammable fumes
B.protect firefightiers from flames
C.prevent flames from entering tanks
D.keep flame and sparks from getting out of an engine’s exhaust system
相关考题：
Any open flame can’t exist in this business buildingA.Yes. We’ve removed all the flammable gas.B.Yes. We’ve searched everywhere for flammable liquidC.Yes. All the flammable liquid and gas have been removed already.D.Yes. We’ve removed all the liquid, gas and wood which can be burned
Studies show that people are more to suffer from back problems if they always sit before computer screens for long hours. ( )A. likelyB. possibleC. probableD. sure
If the flame from combustion in the cylinder of a four-stroke engine past the piston into the space below, the accumulation of flammable mixture would be ignited, thus resulting in _____.A.the crankcase explosionB.lifting of the cylinder safety valveC.a scavenge fireD.opening of the manhole
An inert gas system on a tanker should be used to ______.A.prevent the generation of flammable or combustible gas in tanksB.blow out cargo lines to prevent the build up of gas concentrationsC.dilute tank atmospheres to keep gas concentrations below the lower explosive limitD.prevent fires in the pumproom by continually displacing flammable vapors
How does an inert gas system on a tanker function to prevent explosions in cargo tanks?A.De-energizes the "charged mist" effectB.Maintains a positive pressure on the vent header to cool the flammable vaporsC.Inert gas filters out the flammable vapors from the cargo tank spacesD.Inert gas dilutes the flammable vapor and air concentrations to keep them below the lower explosive limit
Butadiene，inhibited，is labeled as a ______．A.Combustible liquidB.Flammable gasC.Flammable liquidD.Flammable solid
When flammable liquids are handled in a compartment on a vessel，the ventilation for that area should be ______．A.operated continuously while vapors may be presentB.operated intermittently to remove vaporsC.available on standby for immediate useD.shut down if an explosive mixture is present
CIt is desirable to have screens on the vents of potable water tanks to ______．A.Filter the incoming airB.Prevent explosionsC.Prevent backupsD.Stop insects from entering
What is acceptable flame screening ________．A.A fitted single brass screen of 10 x 10 meshB.A fitted stainless steel screen of 30 x 30 meshC.A fitted single stainless steel screen of 15 x 15 meshD.Two fitted brass screens of 10 x 15 mesh spaced 1/2 inch apart
A flame screen ______.A.permits the passage of vapor but not of flameB.prevents the passage of flammable vaporC.prevents inert gas from leaving a tankD.permits vapors to exit but not enter a tank
单选题Regular foam can be used on all but which flammable liquid?（）AMotor gasolineBJet fuelCCrude petroleumDAlcohol
单选题How does an inert gas system on a tanker function to prevent explosions in cargo tanks? （）ADe-energizes the charged mist effectBMaintains a positive pressure on the vent header to cool the flammable vaporsCInert gas filters out the flammable vapors from the cargo tank spacesDInert gas dilutes the flammable vapor and air concentrations to keep them below the lower explosive limit
单选题If you find an extremely large refrigerant leak while using a halide torch, your flame will（）Achange from blue to orangeB‘flare up’ and remain lightedCprobably go outDstay blue
单选题A flame screen（）.Apermits the passage of vapor but not of flameBprevents the passage of flammable vaporsCprevents inert gas from leaving a tankDpermits vapors to exit but not enter a tank
单选题A combustible gas indicator is used to determine （）.Aif there is sufficient oxygen to support lifeBthe toxicity of flammable gases or vaporsCthe amount ofCO2 present in flue gasDthe presence of flammable gases or vapors in the air
单选题It can be concluded from the passage that _____.Asafety screens are of poor qualityBworking at a VDU for a long time is good for one’s healthCmore and more British offices will use word processorsDBritish companies will need fewer and fewer managers
单选题Which of the following SMIT panel screens are used to configure a system’s basic network parameters for the very first time only？（）AChange System User InterfaceBTCP/IP Further ConfigurationCTCP/IP Minimum ConfigurationDNetwork Installation Management
单选题Flame screens are used to（）.Acontain flammable fumesBprotect firefighters from flamesCprevent flames from entering tanksDkeep flames and sparks from getting out of an engine's exhanst system
单选题If the flame from combustion in the cylinder of a four-stroke engine past the piston into the space below, the accumulation of flammable mixture would be ignited, thus resulting in （）.Athe crankcase explosionBlifting of the cylinder safety valveCa scavenge fireDopening of the manhole
单选题In the presence of an open flame or hot surfaces, chlorinated fluorocarbon refrigerants decomposes and from （）Apetroleum crystalsBphosgene gasCwater vaporDcarbon monoxide
单选题A high temperature alarm or （） which will melt is used to guard against the explosion of compressor air pipelines.Aa flame trapBa relief valveCa fusible plugDa bursting cap
单选题Flame failure in an automatically fired auxiliary boiler can from a/an （）Aincorrect electrode settingBincorrect nozzle positionCclogged fuel nozzleDbroken high tension lead
单选题An inert gas system on a tanker should be used to（）.Aprevent the generation of flammable or combustible gas in tanksBblow out cargo lines to prevent the build up of gas concentrationsCdilute tank atmospheres to keep gas concentrations below the lower explosive limitDprevent fires in the pumproom by continually displacing flammable vapors
单选题An inert gas system on a tanker should be used to（）.Aprevent the generation of flammable or combustible gas in tanksBblow out cargo lines to prevent gas concentrationsCdilute tank atmospheres to keep gas concentrations below the lower explosive limitDprevent fires in the pumproom by continually displacing flammable vapors
单选题Portable CO2 fire extinguishers should NOT be used to inert a space containing flammable liquids due to the danger of（）.Athe CO2 being inhaled by personnelBreflash of burning liquidsCvapor condensation on the extinguisherDthe discharge causing a static spark
单选题A tank vessel transferring non-flammable hazardous cargo in bulk must display warning signs. These signs must（）.Abe visible from both sides and from forward and aftBindicate NO SMOKINGCbe displayed only while transferring cargo and fast to a dockDuse black lettering on a white background