very urgent! please help MET 144 -Test 1 (materials, properties, polymers) Revie
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very urgent! please help
MET 144 -Test 1 (materials, properties, polymers) Review Test 1 (Chapters 2, 3, 8) Study Guide For all chapters, review the "Key Words" listed at the end of the chapter, make sure that you understand the significance of these terms. Review the figures and illustrations. Make sure that you understand what information the figure is illustrating Review the homework questions Chapter 2-Properties of Materials What is the difference between mechanical and physical properties? What are two examples of static mechanical tests? List two examples of dynamic mechanical tests. What is the difference between Ultimate Tensile Strength and toughness? On the diagram below showing results for a tensile test of three different materials: What are the correct labels (including units) for the x and y axes? Which of these three materials has the highest E, Young's modulus of elasticity? Which has the lowest E, Young's modulus of elasticity Which material is the least ductile? (the most brittle) how can you tell? Which material has the largest tensile strength? The largest yield strength? Load vs. Strain 4500 2000 1500 500 0.2 0.4 0.6 0.8 Chapter 3-Nature of Materials What are the names of the particles which comprise an atom? The elements in the periodic table are arranged in rows according to increasing What is the difference between metallic, covalent, and ionic bonding? Why is it important to understand the "electronic configuration" of an atom? How do you find this information? What is the term used to describe the possibility of some elements (like carbon) to form different structures where the only difference is the arrangement of the atoms?Explanation / Answer
Chapter 2
What is difference between mechanical and physical properties?
Mechanical properties are those properties of material which measure material reaction to applied force. Ex- wear resistance, tensile strength, elongation, Young’s modulus, fracture toughness, and fatigue strength.
A physical property is an aspect of matter that can be observed or measured without changing it. Examples of physical properties include colour, molecular weight, volume, density, thermal and electrical conductivity, and thermal expansion.
What are the two types of static mechanical tests?
Tensile test and Compression test
What are the two types of dynamic mechanical tests?
Ball indentatiob tests and Impact tests
What is the difference between ultimate tensile strength and toughness?
Ultimate tensile strength strength is the maximum stress which a material can withstand while toughness is the maximum energy stored in a upto fracture.
What are correct label for X and Y axes?
X axis showing Strain which has no unit while Y axis is showing stress unit is Pascal
Which of these three materials have heighest E?
On stress strain diagram E is the slope of the curve. Curve having small dotted lines is having maximum slope, hence maximum E.
Which has lowest E?
Curve having large dotted lines is having least slope, hence lowest E.
Which material is least ductile?
The material having stress strain curve in solid line iis least ductile because it is breaking just after elastic limit
Which material have largest yield strength?
The material having small dotted line in stress strain curve is having largest yield strength
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