When fighting an electrical fire, you should first ().
- Astop ventilation to the area
- Bstop the vessel
- Csecure electricity to the circuit
- Dapply CO2 to the fire
When fighting an electrical fire, you should first ().
1、To extinguish an electrical fire, you
To extinguish an electrical fire, you should use ().Amechanical foamBchemical foamCcarbon dioxideDsoda acid
2、When fighting an oil or gasoline fire
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
3、When used to fight fire,carbon dioxide
When used to fight fire,carbon dioxide().Ais effective if used promptly on an oil fireBhas a greater cooling effect than waterCis lighter than airDis harmless to cargo and crew
4、When would you ground an electric hand
When would you ground an electric hand tool?()AWhen it is a DC machineBWhen it is an AC machineCAny machine that operates on over 100 voltsDOnly when working on wet steel plate
5、When fighting a fire with a portable d
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
6、When fighting a spreading fire resulti
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 rag