The stress-strain behavior of ceramics is usually determined using: a tensile te

Question

The stress-strain behavior of ceramics is usually determined using: a tensile test a compression test a bending test Ceramics have a disposition to fail by cracking because of: The difficulty for slip to occur (low to no plasticity) The higher density of flaws Their high melting points a and b In ceramics, strength: Is reliably the same in all samples Varies depending on sample size Varies depending on strain Is higher in compression than in tension b and d Glasses: Are noncrystalline ceramics Deform by viscous flow Are often transparent All of the above The degree of polymerization is a measure of: The weight of one chain of polymer The weight of one repeat unit The number of repeat units in a polymer chain The weight average molecular weight and number average molecular weight are different measures of the molecular weight of the polymer the same number, just a different name the molecular weights of the repeat unit When applying a stress to a viscoelastic polymer The strain increases instantaneously to a value equal to the stress divided by the Young's modulus The strain doesn't change The strain progressively increases and keeps increasing as long as the stress is being applied

Explanation / Answer

solutions:

1. Compression test

2. a and b

3. b and d

4. all of the above

5. c

6. a

7. a (visco elasticity is a type of deformation exhibiting the mechanical charactersistics of viscous flow and elastic deformation)

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