Hierarchy of controls + Fire Safety

What class of fires is a water fire extinguisher effective against?

• Class B
  

• Class C

• Class A

• Class K

Which type of fire extinguisher uses a dry chemical powder?

• Foam fire extinguisher
  

• Wet chemical fire extinguisher

• Carbon dioxide fire extinguisher

• Dry chemical powder fire extinguisher

Clean agent fire extinguishers are designed for which classes of fires?

• Class A and K
  

• Class B and C

• Class A and B

• Class D and K

What is the first step in the PASS technique for using a fire extinguisher?

• Aim the nozzle at the fire
  

• Squeeze the handle

• Pull the pin

• Sweep the nozzle side to side

Where should you aim the nozzle of the fire extinguisher?

• At the flames
  

• At the ceiling

• At the base of the fire

• At the wall

What is the most likely cause of a burn injury during welding?

• Incorrect grounding of the welding machine
  

• Improper ventilation in the welding area

• Touching hot metal before it has cooled properly

• Using toxic welding rods

Which hazard can result from a damaged cable on a welding machine?

• Fire
  

• Fumes

• Electric shock

• Confined space risk

Which of the following is an example of the "Substitution" level in the hierarchy of controls for welding safety?

• Replacing toxic welding rods with less harmful ones
  

• Removing flammable materials from the welding area

• Requiring workers to wear fire-resistant clothing

• Implementing mandatory safety training

What safety measure should be taken to prevent electric shock when working on electrical equipment?

• Always wear safety glasses
  

• Follow Lockout/Tagout procedures

• Install proper ventilation systems

• Remove all flammable materials from the work area

Which type of control involves using proper ventilation systems to reduce exposure to welding fumes?

• Elimination
  

• Engineering controls

• Administrative controls

• Personal Protective Equipment (PPE)