IET 170 Midterm || Questions and 100% Verified Answers.
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Course
IET 170
Institution
IET 170
What types of design features favor manufacture as a joined assembly? correct answers Large size products, products with high degree of shape complexity, or products with a wide variation in required properties
What is welding? correct answers The permanent joining of two base materials using he...
IET 170 Midterm || Questions and 100% Verified Answers.
What types of design features favor manufacture as a joined assembly? correct answers Large
size products, products with high degree of shape complexity, or products with a wide variation
in required properties
What is welding? correct answers The permanent joining of two base materials using heat and
pressure
What are some possible problems associated with the high temps that are commonly used in
welding? correct answers too much heat you can develop cracks, cavities, incomplete fusion,
incomplete penetration, unacceptable shapes, splatter
What the three primary aspects required to produce a high quality weld? correct answers Heat,
pressure, and protection
How are welding processes identified by the American welding society? correct answers Flame,
arc, resistance, solid-state, unique
In what way is the weld-pool segment of a fusion weld like a small metal casting? correct
answers You take a solid you add heat put it into a cavity and let it harden
Why is it possible for the fusion zone to have a chemistry that is different from the filler metal?
correct answers If you use too high of a heat you will offset the decridation of the base material
with the filler material
Fusion Welding correct answers uses heat to join or fuse two or more materials by heating them
to melting point
What are some of the defects or problems that can occur in the molten metal region of a fusion
weld correct answers Cracks, shrinkage, oxidizes quickly and can develop a hole
Why do most welding failures occurs in the heat effected zone? correct answers the material has
not melted but hasn't been subjected to elevated temperatures for a brief period of time
In what ways might welding create geometric notches in a welded structure? correct answers
Surface tension can spread out or build up if the filler and base are at two different temps
Why does an oxyfuel-gas welding tourch usually have a flame with two distanct regions correct
answers The first cone is the max temp and the second cone is the chemical reaction of color
change
What is the location of the maximum temperatures in an oxy-acetylene flame? correct answers
Inner cone tip
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