单选题When should a fire be ventilated?（）AWhen attacking the fire directlyBWhen using a steam smothering systemCWhen using the fixed CO2 systemDAll of the above
单选题
When should a fire be ventilated?（）
A
When attacking the fire directly
B
When using a steam smothering system
C
When using the fixed CO2 system
D
All of the above
参考解析
解析：
暂无解析
相关考题：
发生火情时，客人们能用电梯吗?A.Can guests use the stairs when a fire appears?B.Can guests use the elevators when a fire presents?C.Can guests use the lifts when a fire occurs?D.Can guests use the ladders when a fire breaks up?
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
Hygroscopic cargoes should be ventilated when ______.A.going from a warm to a cold climateB.the dew point of the outside air is greater than the dew point of the air in the holdC.the dew point of the air in the hold is very lowD.the outside dew point is 16°C and the cargo temperature is 12°C
单选题When electrical equipment is involved in a fire，the stream of dry chemicals should be（）.Aaimed at the source of the flamesBfogged above the equipmentCshot off a flat surface onto the flamesDused to shield against electrical shock
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Storage batteries should be charged in a well ventilated area because（）.Athey generate heatBthey emit hydrogenCof the toxic fumes they emitDthey recharge faster in a well ventilated space
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A fire must be ventilated（）.Awhen using an indirect attack on the fire such as flooding with waterBto prevent the gases of combustion from surrounding the firefightersCto minimize heat buildup in adjacent compartmentsDif compressed gas cylinders are stowed in the compartment on fire
单选题When two fire hose teams are attacking a fire they should（）.Ause different fire hose pressuresBuse fire hoses of different sizesCnot attack the fire from opposite sidesDnot wear protective clothing
单选题Which of the following actions should be taken by the engine room watch when the general alarm is sounded continuously?（）AThe fire pump should be startedBThe boiler rims should be securedCThe fixed CO2 system should be initiated into actionDThe engine room ventilation should be secured
单选题To prevent damage by and to storage batteries aboardsmall passenger vessels they should be located（）.Ain trays constructed of material that is resistant to the electrolyteBso as to prevent movement when the vessel pitches and rollsCin a well ventilated areaDAll of the above
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When the PSCO would like to witness a fire drill carried out by the crew, he should consult （）to locate a simulated fire.Athe manager of the companyBthe surveyor of the Classification SocietyCthe master of the vesselDthe chief engineer of the vessel
单选题If in doubt as to the true water level when a boiler is being oil-fired, you should （）.Atake no measuresBextinguish the fire as soon as possibleCfeed water to the boilerDopen the blow down valve
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（） should be tested and adjusted when the boiler survey is carried out.AThe boiler oil tankBThe steam pipeCThe fire sideDThe safety valves
单选题When sailing in cold zones, the（） should be heated.Athe steering gear roomBthe fire fighting pipe lineCthe fuel oil tankDthe bath room
单选题When approaching a fire from win ward, you should shield firefighters from the fire by using（）Alow-velocity fogBhigh-velocity fogCa straight stream of waterDfoam spray
单选题Which of the actions listed should be taken by the engineer on watch when the general alarm is sounded continuously for 10 seconds?（）AEngine room ventilation should be startedBMain engines should be securedCThe fire pump should be startedDThe fixed CO2 system should be activated
单选题Certain dangerous goods are required “to be stowed in a mechanically ventilated space”. When such goods are carried in a closed Ro/Ro cargo space or a special category space，this space should（）.Abe mechanically operatedBbe temperature controlledCbe mechanically ventilatedDnot allow to run its refrigeration or heating equipment
单选题Which statement is FALSE concerning precautions during fueling operations?（）AAll engines，motors，fans，etc. should be shut down when fuelingBAll windows，doors，hatches，etc. should be closedCA fire extinguisher should be kept nearbyDFuel tanks should be topped off with no room for expansion
单选题When possible，what should be the FIRST step in combating a fire on deck resulting from a cargo overflow or a leaking cargo line?（）ABlanket the cargo spill with foamBPrevent the spread of fire with a foam damCApply CO2 on burning fuel at its sourceDShut off the transfer of cargo
单选题Hygroscopic cargoes should be ventilated when（）.Agoing from a warm to a cold climateBthe dew point of the outside air is greater than the dew point of the air in the holdCthe dew point of the air in the hold is very lowDthe outside dew point is 16°C and the cargo temperature is 12°C
单选题When occurring a fire in the scavenge air box, the following measures should be taken except for（）Areducing speed to SLOW and asking bridge for permission to stopBstopping the fuel oil supplyCswitching-on the auxiliary blowersDputting the scavenge air box fire extinguishing equipment into function
单选题Hygroscopic cargoes should be ventilated when（）.Agoing from a warm to a cold climateBthe dew point of the outside air is greater than the dew point of the air in the holdCthe dew point of the air in the hold is very lowDthe outside dew point is 16℃ and the cargo temperature is 12℃
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When fighting fires in spaces containing bottles of LPG (liquefied petroleum gas)，you should （）.Aattempt to isolate the fire from the LPGBcool the bottles or remove them from the fire areaCsee that the valves on all LPG bottles are closedDplace insulating material over the bottles