单选题If there has been a fire in a closed unventilated compartment it may be unsafe to enter because of ().Aunburned carbon particlesBexcess nitrogenCa lack of oxygenDexcess hydrogen

单选题
If there has been a fire in a closed unventilated compartment it may be unsafe to enter because of ().
A

unburned carbon particles

B

excess nitrogen

C

a lack of oxygen

D

excess hydrogen


参考解析

解析: 暂无解析

相关考题:

When will the fire department come to conduct a fire prevention inspection in our company?A. Next month. I’ve checked hydrants and fire-extinguishers on each floorB.Next day. The manager will check hydrants and other equipment in the building.C.Next week. But hydrants and fire extinguishers on each floor has already been checkedD.The day before yesterday. I had already checked hydrants and fire extinguishers on each floor.

The boy()to school already. A、has takenB、has been takingC、is takenD、has been taken

After a fire has been extinguished in a closed space, personnel may safely enter the space whenA.smoke density has been decreased sufficiently to see the bulkhead opposite the compartment's entranceB.a lifeline and explosion proof flash light are usedC.all smoke and toxic fumes are removed and an adequate oxygen supply is presentD.overhaul has been completed to remove any possible source of re-ignition

The palace eaught fire three times in the last century , and little of the original buliding________now .A. remains B.is remainedC. is remaining D. has been remained

A tank has been sealed and unventilated(不通风的) for a long period of time. Which of the following conditions does this indicate?A.The tank is safe to enterB.The tank is especially dangerous to enterC.Carbon monoxide(一氧化物) is presentD.Water vapor present when the tank was sealed has oxidized(使氧化)

A vessel has been damaged by fire. The survey shows the cost of repairs will exceed the value of the repaired vessel. This is an example of a(n) ______.A.constructive total lossB.salvage lossC.actual lossD.preferred loss

After each container has been stuffed,responsible personnel will ensure that the doors have been securely closed and are watertight and a ______ has been placed on the container.A.realB.dealC.sealD.meal

What is the major function of the deck water seal in an inert gas system ________.A.Relieve excessive overpressures in the systemB.Isolate hazardous from nonhazardous areasC.Prevent the flow of inert gas into closed tanksD.Remove any leftover water or soot after the gas has been scrubbed

A carbon dioxide fire extinguisher should be recharged ______.A.at least annuallyB.whenever it is below its required weightC.only if the extinguisher has been usedD.before every safety inspection

The technician has suspicions that a browser has been hijacked. Which of the following should the technician look for in this situation?()A、A new default gateway has been setup.B、A new Internet shortcut has been added.C、A new web browser has been installed and is now the default.D、A proxy server has been enabled.

The fire site has been ()up.A、takenB、putC、cleanedD、kept

单选题In the event of a fire, the doors to a stair tower must be closed to prevent the spread of fire by ().AconvectionBconductionCradiationDventilation

单选题A small fuel spillage has occurred during helicopter refueling. After the leak has been stopped and fire-control personnel have been notified and are standing by,the next step is to().Aproceed with fueling operationBhave helicopter move to a safer locationCwash spilled fuel away with a flood of waterDclean spilled fuel with rags

单选题If there has been a fire in a closed unventilated compartment it may be unsafe to enter because of ().Aunburned carbon particlesBexcess nitrogenCa lack of oxygenDexcess hydrogen

单选题()should not be considered as components as fire installations.Afire pumpsBfire mainsChydrants and hosesDclosing appliances which are kept permanently closed at sea

单选题Ventilation systems connected to a compartment in which a fire is burning are normally closed to prevent the rapid spread of the fire by().AconvectionBconductionCradiationDspontaneous combustion

单选题After a fire has been extinguished in a closed space, personnel may safely enter the space when ().Asmoke density has been decreased sufficiently to see the bulkhead opposite the compartments entranceBa lifeline and explosion proof flash light are usedCall smoke and toxic fumes are removed and an adequate oxygen supply is presentDoverhaul has been completed to remove any possible source of re-ignition

单选题According to the passage, the Concordia’s captain has been charged with causing the crash andAdrug useBalcohol abuseCabandoning his postDsetting fire

单选题According to the passage, the Concordia´s captain has been charged with causing the crash and______.Adrug useBalcohol abuseCabandoning his postDsetting fire

单选题A tank has been sealed and unventilated for a long period of timeWhich of the following conditions does this indicate?()AThe tank is safe to enterBThe tank is especially dangerous to enterCCarbon monoxide is presentDWater vapor present when the tank was sealed has oxidized

单选题RESULT OF SEARCH NEGATIVE means().Athe search has found nothingBthe derelict has been foundCthe derelict has been locatedDthe derelict has been sighted

单选题Why has Anne been absent from class? AShe has been ill.BShe has been in Mexico.CSome relatives have been visiting her.

单选题When an oil fire has been extinguished, the surface of the oil should be kept covered with foam to prevent ().Aair from contacting the oil vaporsBpermitting re-ignition boiling of the heated oilCspontaneous combustion below the oil surfaceDtoxic fumes from escaping to the surface

单选题()of the following statements is incorrect regarding a fire and boat drill ao board your cargo vessel.AAt least one fire and drill shall be held within 24 hours of leaving a port where more than 25 percent of the crew has been replacedBThe Master is responsible in seeing thst each lifeboat is lowered to the water at least once in each 6 monthsCLifeboat equipment shall be examined at least once each month to insure that it is completeDAn entry shall be made in the vessels official Logbook relative eo each fire and boat drill

单选题A crew member reports that the high-pressure alarm light of a low-pressure CO2 fixed fire extinguishing system is illuminated. The most probable cause of this condition would be that().Aan air leak has developed in the tankBthe tank cooling system has malfunctionedCthe pilot cylinder discharge valve is leakingDan excessive amount of insulation has been installed on the tank and piping

单选题Port of Registry refers to the port where().Athe ship has been namedBthe ship has been builtCthe ship has been signedDthe ship has been registered

单选题The technician has suspicions that a browser has been hijacked. Which of the following should the technician look for in this situation?()AA new default gateway has been setup.BA new Internet shortcut has been added.CA new web browser has been installed and is now the default.DA proxy server has been enabled.

单选题A carbon dioxide fire extinguisher should be recharged().Aat least annuallyBwhenever it is below its required weightConly if the extinguisher has been usedDbefore every safety inspection