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Acetylene is absorbed in ____________________.

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Most paints containing ____________________ have been removed from the market; however, some industries, such as marine or ship applications, still use them.

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List special protective clothing made of leather that can be worn by welders.

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Capes, jackets, apro...

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____ light can cause temporary night blindness.


A) Ultraviolet
B) Infrared
C) Visible
D) Spectral

E) A) and C)
F) All of the above

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


A) Air-purifying
B) Atmosphere-supplying
C) Powered air-purifying
D) Supplied-air

E) All of the above
F) A) and D)

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Green hoses are to be used only for ____________________.

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


A) Ultraviolet
B) Infrared
C) Visible
D) Spectral

E) None of the above
F) B) and C)

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General work clothing should ____.


A) be made of a synthetic fabric
B) be loosely woven, and a light color
C) be tightly woven and a dark color
D) have deep pockets

E) A) and D)
F) None of the above

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Welding cable must be spliced ____ the electrode holder.


A) within 10 feet of
B) more than 10 feet away from
C) within 20 feet of
D) more than 20 feet away from

E) All of the above
F) None of the above

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____________________ is a metal used in large quantities in the manufacture of brass and is found in brazing rods.

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


A) refracted
B) reflected
C) radiated
D) full spectrum

E) A) and B)
F) A) and C)

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____ is formed when ultraviolet radiation decomposes chlorinated hydrocarbon.


A) Argon
B) Phosgene
C) Ozone
D) Carbon dioxide

E) B) and D)
F) A) and C)

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


A) Face
B) Hands and arms
C) Neck and wrist
D) Ears and head

E) A) and B)
F) All of the above

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What is the most severe degree of a burn?


A) First degree
B) Second degree
C) Third degree
D) Fourth degree

E) B) and D)
F) A) and B)

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Describe how to test a grinding stone for cracks.

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Before a grinding stone is put on the ma...

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When a grinding stone wears down, keep the tool rest adjusted to within ____________________ of an inch.

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A(n) ____________________ will prevent an accidental separation of a tool cord from an extension cord during operation.

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Why is it dangerous to weld or cut directly on concrete?

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All concrete is porous, containing thous...

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Burns ____.


A) are caused by heat and not light
B) are among the least common injuries in a welding shop
C) are divided into four categories
D) have a high risk of infection because of the dead tissue

E) A) and B)
F) A) and C)

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


A) polyester
B) 100% cotton
C) 100% wool
D) leather

E) All of the above
F) C) and D)

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