Plasma Arc Cutting

Why should synthetic clothes never be worn when operating the plasma arc cutter?

• They are too expensive.

• They create an electrical shock hazard.

• They are highly flammable.

• They are energy absorbing which creates a health hazard.

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

• 2

• 4

• 8

• 10

The fume plume for plasma arc cutting is

• minimal.

• about like oxy-fuel gas welding

• large and needs to be ventilated well

• light and dissipates quickly.

Avoid using the plasma arc cutter in

• outside locations.

• interior locations.

• shops with concrete floors.

• area where combustible gases are stored.

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

• Shaded lens

• Shaded lens, and hearing protection.

• Shaded lens, hearing protection, and gloves

• Shaded lens, hearing protection, gloves, and leather apron (or welding jacket).

Electrical shock is more of a possibility in the plasma arc cutting process than with arc welding process because of ____________________.

• the type of equipment used.

• the high voltage and amperage used.

• the high arc temperatures

• the plasma gases used in the cutting process.

What approximate air pressure must be present to activate OUR plasma arc cutters?

• 150-165 p.s.i.

• 50-80 p.s.i

• 60-70 p.s.i.

• 90-120 p.s.i.

What happens to the travel speed of the plasma arc cutting machine when the metal being cut is thick?

• It must be slowed down

• It must be sped up

• Travel speed does not change

• Travel speed is a function of the operator's ability

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

• Move quickly when making the cut.

• Move slowly when making the cut.

• Use a straight edge.

• Increase the amperage slightly to assure complete melting of the edges along the kerf.

The cutting nozzle should be held about ____________ above the metal being cut when using the plasma arc cutter.

• 1/4 inch

• 1/8 inch

• 1/2 inch

• 3/4 inch