The high-velocity fog tip used with the all-purpose fire fighting nozzle should always be ______．A.Attached by a chainB.Coated with heavy grease to prevent corrosionC.Painted red for identity as emergency equipmentD.Stored in the clip at each fire station
The high-velocity fog tip used with the all-purpose fire fighting nozzle should always be ______．
A.Attached by a chain
B.Coated with heavy grease to prevent corrosion
C.Painted red for identity as emergency equipment
D.Stored in the clip at each fire station
相关考题：
PULL THE STRINGS AROUND YOUR WAIST AND TIE IN FRONT. This description is likely used in ______.A.fire fighting operationsB.salvage operationsC.cargo operationsD.manoeuvering operations
The difference in water spray pattern between the high-velocity tip and low-velocity applicator used with the all-purpose nozzle is due to ______.A.a difference in water pressureB.the method of breaking up the water streamC.the length of the applicatorD.All of the above
A fire hose with a nozzle attached must be connected to each hydrant except when exposed to heavy weather or when the ______．A.Fire hose might be damaged by cargo operationsB.Vessel is in portC.Fire-main system is not chargedD.Fire pumps are used for purposes other than supplying water to the fire main
If a firefighting situation calls for low-velocity fog you would ______．A.order the engine room to reduce pressure on the fire pumpB.put the lever on an all-purpose fire nozzle all the way forwardC.attach a low-velocity fog applicator with the nozzle shut downD.put the lever on an all-purpose fire nozzle all the way back
Which of the following statements is FALSE concerning the proper procedure in handling a fire hose ________．A.A 1.5 inch hose should be deployed with a minimum of a nozzleman and hosemanB.Back-up hosemen should be positioned wherever the hose makes a significant turnC.The fire hose should be partially charged before deploying it from the fire stationD.The nozzleman should always hold the nozzle with one hand on top，to prevent kickback
单选题When fighting a spreading fire resulting from a broken fuel line, you should FIRST （）.Alook for a CO2 extinguisherBuse a soda acid extinguisherCshut off the fuel supplyDsmother the fire with rags
单选题If a firefighting situation calls for low-velocity fog you would（）.Aorder the engine room to reduce pressure on the fire pumpBput the lever on an all-purpose fire nozzle all the way forwardCattach a low-velocity fog applicator with the nozzle shut downDput the lever on an all-purpose fire nozzle all the way back
单选题On the all-purpose nozzle，the position of the valve when the handle is all the way forward is（）.AshutBfogCsolid streamDspray
单选题Water fog from an all-purpose nozzle may be used to（）.Afight an electrical fireBfight a magnesium fireCeliminate smoke from a compartmentDAll of the above
单选题The straight stream capability of an all-purpose nozzle is used in fighting a class A fire to（）.Ashield fire fighters from radiant heatBbreak up burning materialCget the most water possible on the fireDdrive heat and smoke ahead of the fire fighters
单选题The all-purpose nozzle will produce a fog spray when you（）.Apull the nozzle handle all the way back toward the operatorBpull the nozzle handle back to a position where the handle is perpendicular to the plane of the nozzleCpush the nozzle handle forward as far as it will goDinsert a fog applicator between the fire hose and nozzle
单选题The basic training in fire prevention and fire fighting should include the theoretical elements which should cover （）.Athe three elements of fire and explosionBlower and upper flammable limitsCclassification of flies and applicable extinguishing agentsDAll of the above
单选题High-velocity fog（）.Ais a finer，more diffuse water spray than low-velocity fogBrequires that the water pressure be no greater than 60 psiCproduces an effective fog pattern no more than 6 feet beyond the nozzleDextinguishes a fire by absorbing heat and reducing the supply of oxygen
单选题A high-velocity fog stream can be used in fire fighting situations to drive heat and smoke ahead of the fire fighters in a passageway. This technique should only be used when（）.Ausing a 2-1/2 inch hoseBthere is an outlet for the smoke and heatCthe fire is totally contained by the ship's structureDat least two fog streams can be used
单选题The difference in water spray pattern between the high-velocity tip and low-velocity applicator used with the all-purpose nozzle is due to（）.Aa difference in water pressureBthe method of breaking up the water streamCthe length of the applicatorDAll of the above
单选题If a fire occurs in the boiler room as a result of a leaking fuel line, you should FIRST （）.Anotify the engineer on watchBisolate and secure the pipingCthrow sand on the fireDextinguish the fire using a combination nozzle with applicator
单选题The spray of water in low-velocity fog will have（）.Agreater range than high-velocity fogBlesser range than high-velocity fogCabout the same range as high-velocity fogDgreater range than a solid stream
单选题A combination or all-purpose nozzle produces（）.Alow-velocity fog onlyBa solid stream onlyCa solid stream and foamDa solid stream and fog
单选题When fighting an oil or gasoline fire in the bilge，which of the following should NOT be used?（）AFoamBSolid stream water nozzleCAll-purpose nozzleDCarbon dioxide
单选题A fire hose with a nozzle attached must be connected to each hydrant except when exposed to heavy weather or when the（）.Afire hose might be damaged by cargo operationsBvessel is in portCfire-main system is not chargedDfire pumps are used for purposes other than supplying water to the fire main
单选题When using a high-velocity fog stream in a passageway，the possibility of a blow back must be guarded against. Blow back is most likely to occur when（）.Apressure builds up in the nozzle which causes a surge of waterBthe only opening in a passageway is the one from which the nozzle is being advancedCpressure in the fire hose drops below 100 psiDa bulkhead collapses due to heat and pressure
单选题When fighting an electrical fire, you should first （）.Astop ventilation to the areaBstop the vesselCsecure electricity to the circuitDapply CO2 to the fire
单选题The basic training in fire prevention and fire fighting should include the practical elements which should allow the trainees to acquire the ability to （）.Ause self-contained breathing apparatusBuse various types of portable fire extinguishersCeffect a rescue in a smoke-filled space wearing breathing apparatusDAll of the above
单选题Halon extinguishers used on a class C fire should be directed at the（）.Abase of the equipmentBtop of the equipmentCpower sourceDsource of the fire
单选题When fighting a fire with a portable dry chemical fire extinguisher，the stream should be directed（）.Aover the top of the flamesBoff a bulkhead into the fireCin front of the fireDat the base of the fire
单选题The 12-foot low-velocity fog applicator（）.Ahas a spray pattern 12 feet in diameterBcan be used in conjunction with both 1-1/2 inch and 2-1/2 inch all-purpose nozzlesChas a 90°bend at its discharge endDhas a screw thread end which connects to the all-purpose nozzle
单选题The preferred agent used in fighting a helicopter crash fire is（）.ACO2Bdry chemicalCwaterDfoam