IET FINAL EXAM Flashcards

1
Q

List 3 Main Classes of Manufacturing

A

-Joining
-facing
-shaping

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2
Q

When a metal fractures beyond the yield point, it is said to be

A

Ductile

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3
Q

For all practical purposes is a rubber band is brittle or ductile material

A

brittle

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4
Q

Possion’s Ratio to steels

A

v = 1/3

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5
Q

Possion’s Ratio to Elastomers

A

v = 1/2

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6
Q

Which of the following drives the material selection for a given product?

A

Design/Performance

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7
Q

Why do we use a stress strain diagram

A
  • True stress strain diagrams do not give a UTS
  • Engineering Stress strain diagrams are easier to measure
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8
Q

To determine how to read any analog instrument, one must be given

A

Greatest number on the measuring tool

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9
Q

What type of bonds allow the long chains in to “Slide” over each other? This bonding type allows elastomers to be very stretchy.

A

Covalent Bond

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10
Q

Cannot reheat and have many cross links

A

thermosets

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11
Q

Can reheat and do not have as many cross links

A

thermoplastics

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12
Q

Common thermoplastics

A

-Poly Ethelyne
-Polypropylene
-Polystyrene
-Polyvinyl Chloride

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13
Q

Plastics Vs Metals

A

-coefficient of thermal expansions is higher for plastics
-Plastics are difficult to repair

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14
Q

What is toughness

A

combo of yield strength and how much you plastically deform it

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15
Q

Largest use of plastics

A

packaging

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16
Q

How are thermosets formed

A

using vulcanization

17
Q

are compounds of Metalica and non Metalica elements

A

Ceramics

18
Q

where it becomes a solid single object

A

sinter

19
Q

ceramics that have been designed to provide certain properties at high temps

A

refractory materials