Chapter 2 welding safety review
the light can injure either the white of the eye or the retina which is the back of the eye
In what two ways ultraviolet light burn the eyes
Shirts must be long-sleeved to protect the arms, pants must be long enough to cover the top of the boots, boots must have high tops to to keep out sparks, cap should be thick enough to prevent sparks.
Describe the ideal work shirt, pants, boots, and caps that should be worn in a welding shop?
35ft
How far away should highly combustible materials be from any welding or cutting?
four
How many fire extinguisher are there?
with a chain or other device
How must high-pressure gas cylinder be stored so they can not accidentally be knocked over?
Areas that have 10,000 cubic ft or more per welder or have the ceiling 16 ft high or higher
Under what condition can natural ventilation be used?
the welding area if possible should be painted with a flat, dark colored or black paint. keep curtains closed
What can be done on the job site to reduce the danger for reflected lights?
earmuffs and earplugs
What type of protections are available to protect the ears during welding?
ultraviolet light because the welder can't see or feel it
Which type of light is the most likely to cause burns? why?
Cylinder storage area must be located away from halls, stairways and exits so in a case of emergency they will not block an escape rote, chained
describe an acceptable storage area for cylinder or fuel free
evenly distributed between both hands and lift with legs, not back. do not lift large bulky object without help
describe how a person to safely lift an object
when is a fire watch needed
flammable things present
1/16 inch
how close to the grinding stone face should the tool best be adjusted?
infrared light
it feels as heat. Although it can cause burns. A person will immediately feel this type of light
ultraviolet light
it is the most dangerous. It can cause first-degree and second degree burns to a welders eyes or to any exposed skin
shears, punches, cut- off machines, band saws
name metal cutting mahcines used in the welding shop and their advantages
third degree burn
surface of the skin and possibly the tissue below the skin appear white or charred
first degree burn
surface of the skin is reddish in color, tender, and painful and does not involve any broken skin
second degree burn
surface of the skin is severely damaged and possible breaks in the skin
visible light
the light that we see. It is produced in varying quantities and colors during welding. too much visible light may cause temporary night blindness
ultraviolet, infrared, visible
three types of light present during welding
pedestal and portable
two types of grinders
Type B ( the symbol is red square with letter B)
used for combustible liquids such as oil gas and paint thinner
Type A (the symbol is green triangle with letter A)
used for combustible solids such as paper, wood and cloth.
Type C ( the symbol is blue circle with letter C)
used for electrical fires ex: motors, fuse boxes and welding machine
Type D ( the symbol is a yellow star with letter D)
used on fire involving combustible materials such as zinc, magnesium, and titanium
metal enclosure, wetness, restricted entry, heavier than air gas,
what are factors neccessary for a confined space hazard?
old paint (lead), zinc, cadnium
what are the materials that can give off dangerous fumes during welding and require forced ventilation
Accidental contact with bare or poorly insulted conductors
what causes the most electric shock in the welding industry?
first step is to put the burned area immediately under cold water until the pain decreases, then cover the area with sterile bandage or clean cloth
what emergency steps should be step should be taken to treat burns?
The best choice is 100% wool but it is hard to find another god choice is 100% cotton clothing
what fabric is the best choice to wear as general work clothing in a welding shop?
ground-fault circuit interrupter
what is a GFCI
caution and common sense
what is the key to preventing accidents in in welding shop
flash burn
what is the name of the eye burn that can occur in a fraction of a second
the cylinder should be moved to a vacant lot or an open area the pressure should be slowly released after posting a warning sign
what should be done with leaking cylinder if the leak can't be fixed?
write HOT on it
what should you do if you have to leave a piece of hot metal unattended?
All leather gauntlet-type gloves,full leather jacket and cap will protect welder's shoulders, arms, and chest,
what special protective items can be worn to provide extra protection for welders hands, arms, body, waist, legs and feet?
pain, loss of hearing, and hot sparks also can drop into an open ear causing severe burns
what types of injuries can occur to the ears during welding?
during welding or cutting
when is a fire watch needed
Small shops or shops with large numbers of welders
when must forced ventilation be used?
themselves
who is responsible for the welder's safty
they must be provided to anyone who is using the product or anyone working in the area where the products are in use
who must be provided with material safety data Sheets (MSDS)?
Any chemicals that are on in the metal will become mixed with welding fumes, a combination that can be extremely hazardous and/or flammable
why does the metal that has been used before need to be cleaned prior to welding?
electrocution hazard
why is it important not to weld when everything is wet?
to prevent accidents
why is it important to keep a welding area clean
the eyes can get easily infected because of dead cells When the eye is burned it feels like there is something in the eye and there may be actually something in the eye. permanent vision damage
why is it important to seek medical treatment for eye burns?
they can catch fire or explode if subjected to welding heat or sparks
why is it unsafe to carry butane lighters or matches in your pockets while welding?
the acetylene is absorbed in acetone and the acetone is absorbed in a filler. The filler does not allow the liquid to settle back away from the valve very quickly
why it is important that acetylene cylinders not be stored horizontally?
so you dont get electrocuted
why must equipment be turned off before working on the electrical terminals
safety glasses because they provides protections from both flying debris and reflecting lights.
why must eye protection be worn at all times in the welding shop?
