The information from Young’'s Modulus A. Stress B. Strain C. Compression D. Stiffness What is ´strength’ mean for metal in material selection's Strength- Density chart? A. Yield strength B. Compressive strength C. Tear strength D. Tensile strength Which specific objective and constrain is related to material’s index M = E/p ? A. Minimum weight and strength B. Strength and fatigue C. Minimum weight and stiffness D. Modulus and stiffness
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- Q1. The information from Young Modulus I. Stress II. Strain III. Compression IV. Stiffness С. Ш and IV D. I, II, III and IV А. I B. I and II Q2. What is 'strength' mean for metal in material selection Strength-Density chart? A. Yield strength B. Compressive strength C. Tear strength D. Tensile strength Q3. Which of the below items have a correlation with materials? I. Function II. Shape III. Attributes IV. Process А. 1, П and I B. I and IV С. 1, I and IV D. I, II, Ш and IV Q4. Choose the correct statement for merit indices in materials selection. A combination of material properties in a materials selection process. II. Performance of material is depending on one merit index. III. It helps to compare the performance of different materials in achieving the I. objective. IV. It displays two different properties of materials. A. II and III В. 1, П and IV C. I and III D. Ш and IV Q5. Which specific objective and constrain of materials index E1/2 M =7) Stress-strain plot for a metal is given below. Determine the following: a) Modulus of elasticity. b) Yield strength by 0.2% off-set method. c) Tensile and fracture strengths. d) Maximum load that can be sustained by a cylindrical specimen having an original diameter of 15.3 mm. e) If a specimen having an original length of 320 mm and elongation is measured as 2.56 mm, determine the applied stress. 450 400 350 300 250 200 150 100 50 0.002 0.004 0.006 0.008 0.01 0.012 0.014 0.016 Strain Stress (MPa)Select All the correct statements from below. a. If the averaged distance between partial dislocations for material A observed under TEM is smaller than material B, the estimated stacking fault energy of material A is lower than material B. b. K_IC is a material property that doesn't change with testing conditions c. The main difference between high cycle fatigue and low cycle fatigue is the difference in the number of cycles to failure d. A negative R value in fatigue test indicate the minimum stress is compressive in nature
- Consider the graph below for 3 test samples A, B and C of the same metal composition which have been cold-worked, but to different extents. If you had to sort the samples by the degree of cold-working they have undergone, how would you rank them? Stress (MPa) 600 500 400 300 200 100 Select one: A B 0.05 0.1 a. CYield strength, ultimate tensile strength, linear coefficient of thermal expansion, modulus of elasticity (E), proportional limit, and rupture strength are all examples of mechanical properties of engineering materials. O True False A non-destructive test is any examination of an object in any manner which will not impair the future usefulness of the object. Non-destructive tests include: magnetic-particle, impacting testing, radiography, eddy current, and fluorescent-penetrant. O True O False One way to make a metal stronger is to increase the metal's grain size. O True O False --- OL T A metal that has a crystalline structure is called amorphous. O True O Falsea What is the difference between vicker hardness test and brinell hardness test based on load ,indenter , accuracy ? b . what is the meaning of toughness in material science ? c . the toughness of material is affected by what ? d . what is the difference between tensile test and impact test?A); How to determine the yield point for materials that do not exhibit a well defined yield point? Name some of such materials. B); Whatis allowable load/stress. Give two different equations that determine the allowable load/stress.Consider the graph below for 3 test samples A, B and C of the same metal composition which have been cold-worked, but to different extents. If you had to sort the samples by the degree of cold-working they have undergone, how would you rank them? Stress (MPa) 600 500 400 300 200 100 05 0 Select one: O a. ASelect three: Three commonly used tests to measure the hardness related properties of materials are: Rebound Fracture Indentation Scratch Charpy YieldPLEASE ANSWER ASAP! RATE WILL BE GIVEN! NO LONG EXPLANATION NEEDED! STRENGTH OF MATERIALS (MULTIPLE CHOICE) Which of the following is NOT TRUE with respect to the Elastic Transverse Shear Formula? a.Transverse shear stress is maximum at the top fiber of the cross-section. b.Transverse shear stress is zero at the neutral axis. c.The value of Q is maximum at the neutral axis. d.The maximum transverse shear stress is maximum where the ratio (Q/t) is maximum e.The value of Q at the bottom fiber is maximumengineering stress, o CO b) Offset (x) 1. Which material has the highest yield strength? 2. Which material has the highest ultimate tensile strength? 3. Which material has the lowest tensile modulus (aka Young's modulus)? 4. Which material has the highest toughness? c) engineering strain, & 5. What offset (x) in engineering strain () should be used to calculate the yield strength? a. 2 b. 0.2 c. 0.02 d. 0.002 e. 0.0002Check the correct statements. a) The huge differences between the values of theoretical strength and real strength of the crystals were attributed to the existence of punctual defects like gaps. b) The extremely high strength limit of filament crystals (whiskers) is generally attributed to the low degree of internal and surface imperfection and justifies their use as reinforcements in composite materials. c) Transmission electron microscopy, decoration technique, special X-ray techniques and indentation allow experimental observation of disagreements. d) During plastic deformation, there is an increase in the density of dislocations in a crystal. 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