Welding Safety

When is it necessary in a weld shop to have a fire watch?

• When a person is welding outdoors

• If a person is cannot see the nearest fire extinguisher

• When sparks are traveling more than 15 ft

• When welding within 35 feet of combustible materials

What type of fire extinguisher is used on electrical fires?

• Type A

• Type B

• Type C

• Type D

Clothing worn in the welding shop should be:

• 100% wool or 100% cotton

• 100% polyester or 100% nylon

• 25% cotton and 75% rayon

• 35% polyester and 65% rayon

Where would a person find information about the maximum safe rpm for a grinding stone?

• on the grinder

• on a chart

• on the blotter on the stone

• the rpm is not important

Which light wavelengths are most harmful?

• Visible and infrared

• Ultraviolet

• Infrared

• Visible and ultraviolet

The tool rest on a grinder should be kept adjusted to within _____________ of the face of the stone.

• 1/4 in. (6 mm)

• 1/16 in. (2 mm)

• 3/8 in. (10 mm)

• 1/8 in. (3 mm)

How long must an acetylene cylinder that has been lying on its side be set vertically before it is used?

• 15 minutes

• 60 minutes

• 10 minutes

• 30 minutes

What can be used to free an acetylene cylinder that has been frozen to the ground?

• Warm water

• Hot air

• Propane torch

• Nothing can be used to safely free the frozen cylinder

A room that is used to store acetylene cylinders must:

• be well lit

• have a solid steel door

• be large enough for two workers

• have good ventilation

As compared to a 12 point socket wrench, a 6 point socket wrench is better to use because:

• it fits more easily on a nut

• it fits in more positions

• it is less likely to slip

• it is less expensive