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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
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更多 “ 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 ” 相关考题
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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
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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
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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
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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
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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
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单选题When fighting a spreading fire resulting from a broken fuel line, you should FIRST （）.A
look for a CO2 extinguisherB
use a soda acid extinguisherC
shut off the fuel supplyD
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单选题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
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单选题On the all-purpose nozzle，the position of the valve when the handle is all the way forward is（）.A
shutB
fogC
solid streamD
spray
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单选题Water fog from an all-purpose nozzle may be used to（）.A
fight an electrical fireB
fight a magnesium fireC
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All of the above
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单选题The straight stream capability of an all-purpose nozzle is used in fighting a class A fire to（）.A
shield fire fighters from radiant heatB
break up burning materialC
get the most water possible on the fireD
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单选题The all-purpose nozzle will produce a fog spray when you（）.A
pull the nozzle handle all the way back toward the operatorB
pull the nozzle handle back to a position where the handle is perpendicular to the plane of the nozzleC
push the nozzle handle forward as far as it will goD
insert a fog applicator between the fire hose and nozzle
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单选题The basic training in fire prevention and fire fighting should include the theoretical elements which should cover （）.A
the three elements of fire and explosionB
lower and upper flammable limitsC
classification of flies and applicable extinguishing agentsD
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单选题High-velocity fog（）.A
is a finer，more diffuse water spray than low-velocity fogB
requires that the water pressure be no greater than 60 psiC
produces an effective fog pattern no more than 6 feet beyond the nozzleD
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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（）.A
using a 2-1/2 inch hoseB
there is an outlet for the smoke and heatC
the fire is totally contained by the ship's structureD
at least two fog streams can be used
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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（）.A
a difference in water pressureB
the method of breaking up the water streamC
the length of the applicatorD
All of the above
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单选题If a fire occurs in the boiler room as a result of a leaking fuel line, you should FIRST （）.A
notify the engineer on watchB
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单选题The spray of water in low-velocity fog will have（）.A
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a solid stream onlyC
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Solid stream water nozzleC
All-purpose nozzleD
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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（）.A
fire hose might be damaged by cargo operationsB
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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（）.A
pressure builds up in the nozzle which causes a surge of waterB
the only opening in a passageway is the one from which the nozzle is being advancedC
pressure in the fire hose drops below 100 psiD
a bulkhead collapses due to heat and pressure
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单选题When fighting an electrical fire, you should first （）.A
stop ventilation to the areaB
stop the vesselC
secure electricity to the circuitD
apply CO2 to the fire
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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 （）.A
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top of the equipmentC
power sourceD
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单选题When fighting a fire with a portable dry chemical fire extinguisher，the stream should be directed（）.A
over the top of the flamesB
off a bulkhead into the fireC
in front of the fireD
at the base of the fire
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单选题The 12-foot low-velocity fog applicator（）.A
has a spray pattern 12 feet in diameterB
can be used in conjunction with both 1-1/2 inch and 2-1/2 inch all-purpose nozzlesC
has a 90°bend at its discharge endD
has a screw thread end which connects to the all-purpose nozzle
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单选题The preferred agent used in fighting a helicopter crash fire is（）.A
CO2B
dry chemicalC
waterD
foam
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