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单选题
When fighting a fire on a bulkhead using a portable carbon dioxide extinguisher，the stream should be directed at the（）.
A
base of the flames，moving the horn from side to side，following the flames upward as they diminish
B
top of the flaming area，moving the horn from side to side，following the flames downward as they diminish
C
center of the flaming area，moving the horn vertically from top to bottom
D
bottom of the flaming area，moving the horn vertically to the top following the flames upward as they diminish
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更多 “单选题When fighting a fire on a bulkhead using a portable carbon dioxide extinguisher，the stream should be directed at the（）.A base of the flames，moving the horn from side to side，following the flames upward as they diminishB top of the flaming area，moving the horn from side to side，following the flames downward as they diminishC center of the flaming area，moving the horn vertically from top to bottomD bottom of the flaming area，moving the horn vertically to the top following the flames upward as they diminish” 相关考题
考题
Portable carbon dioxide fire extinguishers should be sent ashore to be rechargedA.when the remaining charge volume is less than 90 percent of the required volumeB.at each inspection for certificationC.at each annual inspectionD.when the weight loss exceeds 10% of weight of charge
考题
The most effective way of applying carbon dioxide from a portable extinguisher to a fire is by ______．A.Forming a cloud cover over the flamesB.Directing the gas at the base of the flames in a slow sweeping motionC.Discharging the carbon dioxide into the heart of the flamesD.Bouncing the discharge off an adjacent bulkhead just above the burning surface
考题
When fighting a large fire on your vessel and attacking it from ABOVE the space on fire，it is important to ______．A.Rotate personnel，due to heat stressB.Station personnel on the hot deck immediately above the fireC.Stay low by crouching or kneeling on deckD.All of the above
考题
A foam-type portable fire extinguisher is most useful in fighting a fire in ______.A.generatorsB.oil drumsC.the bridge controlsD.combustible metals
考题
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
考题
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
smother the fire with rags
考题
单选题A foam-type portable fire extinguisher is most useful in fighting a fire in（）.A
generatorsB
oil drumsC
the bridge controlsD
combustible metals
考题
单选题What is an advantage of using foam in fire fighting?（）A
It is effective in controlling fire in flowing oil such as coming from a broken fuel lineB
It absorbs heat from materials that could cause reignitionC
Most foams can be used jointly with dry chemical extinguishing agents to attack a fire by two methods of extinguishmentD
Once the surface is blanketed with foam and the fire is extinguished，no further foam is required
考题
单选题When should a fire be ventilated?（）A
When attacking the fire directlyB
When using a steam smothering systemC
When using the fixed CO2 systemD
All of the above
考题
单选题The FIRST course of action in fighting a fire in a cargo or fuel oil tank is to （）.A
secure all openings to the tankB
discharge an initial charge of CO2 with a hand portable extinguisherC
direct a fire hose into the tank and energize the fire mainD
spray the tank boundaries with a fire hose to promote cooling
考题
单选题Portable carbon dioxide fire extinguishers should be sent ashore to be recharged （）.A
when the remaining charge volume is less than 90 percent of the required VOLUMEB
at each inspection for certificationC
at each annual inspectionD
when the weight loss exceeds 10% of weight of charge
考题
单选题A fire is considered "under control" when （）.A
all hands are at their fire stationsB
all fire-fighting equipment is at the sceneC
the fixed systems are activatedD
the fire is contained and no longer spreading
考题
单选题When possible，what is the FIRST step in fighting an engine fuel-pump fire which results from a broken fuel line?（）A
Secure all engine room doors，hatches，and ventsB
Close the fuel line valveC
Check the spread of the fire with foamD
Cast the barge off the wharf
考题
单选题The FIRST step to take in fighting an engine room fire resulting from a ruptured fuel oil service line, is to （）.A
evacuate all engine room personnelB
fight the fire with hand portable extinguishersC
activate the mainCO2 bankD
stop the flow of leaking fuel oil
考题
单选题When fighting an oil or gasoline fire in the bilge，which of the following should NOT be used?（）A
FoamB
Solid stream water nozzleC
All-purpose nozzleD
Carbon dioxide
考题
单选题It is necessary to secure the forced ventilation to a compartment where there is a fire to（）.A
allow the exhaust fans to remove smokeB
extinguish the fire by carbon monoxide smotheringC
prevent additional oxygen from reaching the fireD
protect fire fighting personnel from smoke
考题
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
考题
单选题Carbon dioxide as a fire fighting agent has which advantage over other agents?（）.A
It causes minimal damageB
It is safe for personnelC
It is cheaperD
It is most effective on a per unit basis
考题
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
考题
单选题When sailing in cold zones, the（） should be heated.A
the steering gear roomB
the fire fighting pipe lineC
the fuel oil tankD
the bath room
考题
单选题Which types of portable fire extinguishers are designed for use on electrical fires?（）A
Dry chemical and carbon dioxideB
Foam (stored pressure) and soda-acidC
Carbon dioxide and foam (stored pressure)D
Dry chemical and soda-acid
考题
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
use self-contained breathing apparatusB
use various types of portable fire extinguishersC
effect a rescue in a smoke-filled space wearing breathing apparatusD
All of the above
考题
单选题When fighting a fire in an enclosed space，the hose team should crouch as low as possible to（）.A
protect themselves from smokeB
obtain the best available airC
allow the heat and steam to pass overheadD
All of the above
考题
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
考题
单选题When using carbon dioxide to fight a fire on a bulkhead，the CO2 should be applied（）.A
first to the bottom of the flaming area，sweeping from side to side，and following the flames upwardB
in a circular motion from the middle of the bulkhead outwardC
to the top of the flaming area，sweeping from side to side，and working toward the bottomD
in an up-and-down motion from one side of the bulkhead to the other
考题
单选题Portable fire extinguishers must be provided for the cargo tank area of an unmanned tank barge（）.A
only when fully loadedB
if one or more tanks are fullC
when transferring cargoD
only when the barge is being towed
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