Emergencies & HazardsPregunta 88 de 120
Which type of fire extinguisher should you use on an electrical fire in the cab?
a.A water extinguisher
b.A pressurized garden hose
c.A B:C rated extinguisher such as dry chemical or carbon dioxide
d.Any extinguisher, as long as it is full
Explicación
Electrical fires are Class C, so the agent must be non-conductive, which is why a B:C or A:B:C rated dry chemical or carbon dioxide unit is required. Water conducts electricity and can electrocute the user or spread the fire, and choosing an extinguisher by fullness alone ignores the class rating.
Practica las 120 preguntas gratis — sin registro.
Preguntas relacionadas de este tema
- How can you tell that a tire has failed if you did not hear the blowout?
- Your right wheels drop off the pavement onto a soft shoulder at 55 mph. What is the correct recovery?
- Your air brakes fail on a downgrade and the low-pressure warning is on. What is your best course of action?
- A grease or fuel fire starts near the engine. Why must you never use water on it?
- You are using a fire extinguisher on a small cargo fire. What is the correct technique?
- What is the minimum fire extinguisher rating required on a vehicle transporting hazardous materials that requires placards?
Última revisión: · proceso editorial
Equipo Editorial de PrepPass · Verificado con Commercial Driver's License (CDL) General Knowledge Test · Cómo revisamos