True or False?-Viscosity is a measure ofthe resistance ofaliquid to compress 1. stress, and as the temperature of a liquid, such as motor oil, decreases, the viscosity ve will increase. 2. True or False? (circle the correct answer) When loaded by a constant load, a visco-clastic materiadl will en undergo some limited deformation, but then will continue to experience further strain un continued and constant load. under the same Circle correct answer) ifferent types of liquids may 3. List the 4 different forms of shear stress-strain behaviors that di exhibit. (1/2 pt.ea.) 4. What is the name of the phenomenon whereby a gel, such as clay soil, loses its strength w disturbed by mixing or lots of shear, and then slowly regains its strength with time when left alone. hen 5. What are the names of the two \"devices\" used to model the deformation behavior of materials? Viscous Behavior Elastic Behavior 6. True or False? - Within a single grain of metal, there can be thousands of edge dislocations that move when shear stress is applied. But because grain boundaries blocks the dislocation movements, metal having more boundaries will make for stiffer, less ductile behavior, so smaller grains will be stiffer than the same metal with large grains. (Circle correct answer) metals with True or False? The water of crystallization is water that reacts with the chemicals of cement grains to form hardened concrete gel known as Calcium Silicate Hydrate, but these water molecules remain as H20 within the C-S-H molecular structure, even though there has been a (Circle the correct answer) significant chemical hydration reaction. 8. True or False? -In the strain hardening of metals, a large number of dislocations are forced to move in the atomic structure, and consequently the yield point is increased, but the metal becomes brittle. (Circle correct answer) en a liquid has a high wetting contact angle, , it will readily spread 9. True or False ?-Wh out over a large area. (Circle the correct answer) 10. What basic physical characteristic of a liquid causes the phenomenon of absorption? 11. Explain what is the one principal atomic difference between ceramics and metals that m much harder for electric current to flow through ceramics.
1.False-resistance to shear stress or tensile stress
2.True
3.a)Viscosity b)change of volume or dimesion as temp change is introduced c)Shear stress d)Isotropic
4)Thixotrophy
5)Viscometer American Strength Testing machine
6)True
7)False-The water chemically combine and does not remain as H2O
8)True
9)Tue
10)Surface attraction
11)Ceramics are formed due to combination of ionic and covalent bond, as a result of which no free electrons are there so low current conductance.
12)FCC much greater
13)Total length=65X12x13.5x10^(-6)X(45-0)+65X12
14)poisson\'s Ratio=-{(.298536-.3)/.3}/{(3.0732-3)/3}=2
15)Aluminium and sometimes Zinc is also used
16)False -Ductility will be reduced
17)False-Expands because of the forces between the atoms
18)
19)Surface attraction
20)In metal casting first the metal which is to be inserted is heated as a result of which the length inceases but the diameter is decreased. After this the metals is placed under the casing and allowed to cool thereby making a tight fitting.
21)True
22)True
23)29000000psi
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