When you are firing a pyrotechnic distress signal,it should be aimed().
- Ahorizontally and directly abeam of your vessel
- Bat the vessel whose attention you want to attract
- Cinto the wind
- Dat greater than 60 degrees above the horizo
When you are firing a pyrotechnic distress signal,it should be aimed().
1、When two fire hose teams are attacking
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
2、When approaching a fire from win ward,
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
3、When fighting an electrical fire, you
When fighting an electrical fire, you should first ().Astop ventilation to the areaBstop the vesselCsecure electricity to the circuitDapply CO2 to the fire
4、When should a fire be ventilated?()
When should a fire be ventilated?()AWhen attacking the fire directlyBWhen using a steam smothering systemCWhen using the fixed CO2 systemDAll of the above
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 must a dry chemical fire extingui
When must a dry chemical fire extinguisher be recharged?()AAfter each useBWhen the air temperature exceeds 90°FCEvery 6 monthsDEvery 12 month