单选题Fires occurring in combustible metals, such as sodium or magnesium, are classified as a （）.Aclass ABclass BCclass CDclass D
单选题
Fires occurring in combustible metals, such as sodium or magnesium, are classified as a （）.
A
class A
B
class B
C
class C
D
class D
参考解析
解析：
暂无解析
相关考题：
A petroleum liquid has a flash point of 85°F. This is a grade ______.A.B flammable liquidB.C flammable liquidC.D combustible liquidD.E combustible liquid
What is the best instrument for establishing a safe working area before welding in a confined space?A.An oxygen indicatorB.A combustible gas indicatorC.A combination combustible gas and oxygen indicatorD.A flame safety lamp
Camphor oil is classified as a ______．A.Grade A flammable liquidB.Grade C flammable liquidC.Grade D combustible liquidD.Grade E combustible liquid
A foam-type portable fire extinguisher is most useful in fighting a fire in ______.A.generatorsB.oil drumsC.the bridge controlsD.combustible metals
A portable foam (stored-pressure type) fire extinguisher would be most useful in combating a fire in ______.A.generatorsB.oil drumsC.the bridge controlsD.combustible metals
Which is the right way of listing salt content of 500 grams of bread?__________A.sodium: 32 gramB.sodium: 320 milligramsC.sodium: 3.2 gramD.sodium: 320 gram
MAGFLO®系列电磁流量计信号转换器有（）A、MAG1100MAG2100和MAG3100三种B、MAG2500和MAG3000两种C、MAG2100MAG3000和MAG3100两种D、D、（B、C）都不对
MAGFLO®系列电磁流量计传感器有（）型号A、MAG1100MAG2100和MAG3100三种B、MAG2500和MAG3000两种C、MAG2100和MAG3100两种D、D、（B、C）都不对
单选题One disadvantage of using regular dry chemical (sodium bicarbonate) in firefighting is that（）.Ait can break down under high heat and emit noxious fumesBit will decompose under prolonged storage and lose its effectivenessCfire has been known to flash back over the surface of an oil fireDit is ineffective in fighting fires in high-voltage electrical equipment
单选题What is an advantage of using foam in fire fighting?（）AIt is MOST effective on very hot oil fires where the temperatures of the liquid exceed 100°C (212°F)BMost foams can be used with dry chemicals to attack a fire by two methodsCFoam is effective on combustible metal firesDFoam can be made with seawater or fresh water
单选题Which of the following is true according to the passage?ANot all the fires in the forests must be put out.BPeople‘s carelessness leads to dangerous fires.CAustralia allows all the fires to burn naturally.DThere are more fires in Russia than in the USA.
单选题A microbarograph is a precision instrument that provides a（）.Acharted record of atmospheric temperature over timeBcharted record of atmospheric pressure over timeCgraphic record of combustible gases measured in an atmosphereDgraphic record of vapor pressure from a flammable/combustible liquid
单选题Fires involving combustible metals are classified as （）.Aclass A firesBclass B firesCclass C firesDclass D fires
单选题The primary method by which water spray puts out fires is by（）.Aremoving the oxygenBcooling the fire below the ignition temperatureCremoving combustible materialDdiluting combustible vapors
单选题A combination combustible gas and oxygen indicator is an instrument that measures the（） of both combustible gas and oxygen; each is indicated on a separate meter.ApurifiesBcombinationsCconcentrationsDfilters
单选题Combustible gas indicators measure the presence of combustible gas as a percentage of the（）.Aflash pointBupper explosive limitClower explosive limitDfire point
单选题The blower type crankcase ventilation system （）Aremoves combustible gases in the crankcaseBprevents the formation of combustible gases in the crankcaseCcools lubricating oilDimproves cold weather starting
单选题To avoid scavenge fires occurring the engine timing and equipment maintenance （）.Ashould be correctly carried outBshould correctly be taken placeCshould carded with careDmust to carry out with great care
单选题A petroleum liquid has a flash point of 135°Fahrenheit. This liquid is classed as a grade （）.AB flammable liquidBC flammable liquidCD combustible liquidDE combustible liquid
单选题An inert gas system on a tanker should be used to（）.Aprevent the generation of flammable or combustible gas in tanksBblow out cargo lines to prevent the build up of gas concentrationsCdilute tank atmospheres to keep gas concentrations below the lower explosive limitDprevent fires in the pumproom by continually displacing flammable vapors
单选题An inert gas system on a tanker should be used to（）.Aprevent the generation of flammable or combustible gas in tanksBblow out cargo lines to prevent gas concentrationsCdilute tank atmospheres to keep gas concentrations below the lower explosive limitDprevent fires in the pumproom by continually displacing flammable vapors