Welding Safety Test

_ fire extinguishers are used for electrical fires.

Type C

What is the most sever degree of a burn?

Third degree

Symptoms of lead poisoning include _.

Metallic taste, loss of appetite, nausea, abdominal cramps, and insomnia.

The symptom of acute exposure to high concentrations of cadmium fumes is _.

Lung irritation.

Burns _.

Have a high risk of infection because of the dead tissue.

_ respirators are air-purifying respirators that use a blower to force the ambient air through air-purifying elements to the inlet covering.

Powered air-purifying

To treat a third degree burn _.

Cover the burned area with thick, sterile, non-fluffy dressings.

Light that bounces off of a wall or ceiling is referred to as _.

Reflected

_ are usually either hydraulic or flywheel operated.

Power punches.

_ light can cause temporary night blindness.

Visible

_ light is dangerous because the welder cannot feel the light while being exposed to it, and it may pass through clothing.

Ultraviolet

_ fire extinguishers are used for combustible metals such as zinc and magnesium.

Type D

The best material to use for special protective clothing is _.

Leather

Welding cable must be spliced _ the electrode holder.

More than 10 feet away from

General work clothing should _.

be tightly woven and a dark color

_ is a gas that is produced by the ultravoiolet light in the air in the vicinity of welding operations.

Ozone

If a nut or bolt is too tight to loosen with a wrench, _.

use a longer wrench.

_ is formed when ultraviolet radiation decomposes chlorinated hydrocarbon.

Phosgene

What are the two most common areas of a welder’s body that are burned by UV light?

Neck and wrist.

Acetylene cylinders that have been lying on their sides must stand upright for at least _ hours before they are used.

Four

The final products of all clean-burning hydrocarbon flames are _.

Water vapor and carbon dioxide.

To start a cut on the edge of a plate, _.

hold the torch at a right angle, or pointed slightly away from the edge.

A machine cutting torch is sometimes referred to as a _.

Line burner

The higher the combustion rate of an oxygen fuel mixture, the more prone the mixture is to _.

Flashback

What fuel gas has the slowest burn rate?

Propane

The number of preheat holes determines the _.

type of fuel gas to be used.

To obtain the absolute pressure, _.

add the atmosphere pressure to the gauge pressure.

when metal is burned away, _.

Oxygen forms an iron oxide.

In a two-stage regulator, the first spring _.

is a preset at the factory to reduce pressure to 225 psig

Why would you not reduce the flame size below its correct setting if the torch flame is too large for the job?

Lowering the flame can result in the tip overheating.

A change in the number of sparks given off by the weld as it progresses can be used as an indication of changes in the _.

Weld temperature.

What effect on the weld pool would speeding up or slowing down have?

It will make the weld pool larger or smaller.

In the vertical weld, the _ will constantly be solidifying, forming a new shelf to support the molten weld pool.

trailing edge.

The injector allows oxygen at the higher pressure to draw the fuel gas into the chamber even with the fuel gas pressure is as low as _.

6 oz/inch²

What gas from the flame can protect the molten weld metal from oxidizing?

CO2 (Carbon dioxide)

Why should the end of the welding rod be kept inside the protective envelope of the flame?

To keep the hot end from oxidizing if it is exposed to the air.

SOme joints, such as the lap joint, may never need 100% _; however, they do need 100% _.

penetration, fusion

Which of the following is true of the vertical weld?

It is the most common out-of-position weld.

Extra care should be taken with thin materials on a band saw because they are harder on the blade than thick materials.

True

You can assume that a piece of equipment is fit to use if it has not been removed from service, or it doesn’t have an out of service sign.

False

You may cut multiple layers of steel on the shear to save time.

False

When finished with an oxyfuel welding and cutting rig, you should:

Turn off the bottles, open the valves and close them again, one at a time, to drain the lines, back off the regulators until the handle is loose (?)

Hearing protection should _.

be worn when I expect to be exposed to loud noise, especially for extended periods of time.

The lab techs will really appreciate it if you will fix any damaged equipment and unsafe conditions yourself. The more the damage and the bigger the safety hazard, the better they will like it. That will give them more time for their primary purpose: to clean up after you. You can go and find all the tools and parts you might need in the tool room.

False

You must wear eye protection for the use of any equipment, even under a welding hood.

True

When shearing stock on the Ironworker, adjust the hold down bar slightly above the material thickness so it may slide freely underneath the bar.

True

You do not have to wear eye protection in the shop when you have no intention of using any kind of equipment, including hand tools.

False

Dross is harder than steel and should be removed from cut edges before shearing.

True