Plasma Arc Cutting Safety Test

1. Why should synthetic clothes never be worn when operating the plasma arccutter?

• a. They are too expensive.
• b. They create an electrical shock hazard.
• c. They are highly flammable.
• d. They are energy absorbing which creates a health hazard.

2. The minimum shaded lens that should be used for plasma arc cutting is ____.

• a. 3
• b. 5
• c. 8
• d. 10

3. The fume plume for plasma arc cutting is ________________.

• a. minimal.
• b. about like oxy-fuel gas welding.
• c. large and needs to be ventilated well.
• d. light and dissipates quickly.

4. Which one of the following metals does not give off a toxic fume?

• a. Carbon steel
• b. Beryllium
• c. Copper
• d. Nickel

5. Avoid using the plasma arc cutter in ___________________.

• a. outside locations.
• b. interior locations.
• c. shops with concrete floors.
• d. area where combustible gases are stored.

6. What combustible gas is generated when aluminum is cut with the plasma arc cutter in the presence of water or moisture?

• a. Propane
• b. Methane
• c. Acetylene
• d. Hydrogen

7. What personal protective equipment should be worn when operating a plasma arc cutter?

• a. Shaded lens
• b. Shaded lens, and hearing protection.
• c. Shaded lens, hearing protection, and gloves.
• d. Shaded lens, hearing protection, gloves, and leather apron.

8. If plasma arc cutting takes place in the presence of vapors from chlorinated solvents and cleaners what may happen?

• a. A toxic phosgene gas may be generated.
• b. A combustible gas will be formed.
• c. Hydrogen gas may be generated and cause an explosion.
• d. Nothing- there is no danger cutting in this environment.

9. What approximate air pressure must be present to activate most plasma arc cutters?

• a. 40 p.s.i.
• b. 50 p.s.i.
• c. 60 p.s.i.
• d. 70 p.s.i.

10. How can the plasma arc cutter operator be assured of getting good straight cuts?

• a. Move quickly when making the cut.
• b. Move slowly when making the cut.
• c. Use a straight edge.
• d. Increase the amperage slightly to assure complete melting of the edges along the kerf.