engineering materials uiz 7-Version W 4. Which quantity equals the beam stiffnes
ID: 1842867 • Letter: E
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engineering materials
uiz 7-Version W 4. Which quantity equals the beam stiffness? Questions 1 through 7 refer to Example 7.2, relat- A. (Fl4/or2) ing to the selection of a material for a bicycle frame consisting of tubular cantilever beams. If you worked C. (p/E) through the problem, you used the following formulas: D. M (1) E. E 13F 5. Which criterion was used in Example 7.2 to (2) minimize the mass for a given beam stiffmess? A. Minimize p. B. Maximize E. M (3) C. Minimize In these equations. D. Minimize (p/E) E. Minimize (PF/3ETrat) deflection of the beam's free end length of the beam 6. Suppose the price per kilogram of a material load on the beam is denoted by p. Which criterion was used in Young's modulus Example 7.2 to minimize the price for a given beam stiffness t thickness of the beam. A. Minimize pp M mass of the beam. B. Maximize PE p the density of the material. C. Minimize p(Fli/or 2) 1. How was Equation (1) obtained? D. Minimize p(p/E) A. It was found in a handbook. E. Minimize F/3Errat) B. It was derived from the geometry of the sys- tem and the definition of density. C. It was derived by combining the other two 7. What is a cantilever? equations. A. Column supported at one end D. It is a fundamental law of kinematics. B. Column supported at both ends E. The NM legislature included it in the state C. Beam supported at one end building code. D. Beam supported at both ends 2. How was Equation (2) obtained? E. Inclined plane A. It was found in a handbook. 8. In which mode does a beam carry a load? B. It was derived from the geometry of the sys- A. Compression tem and the definition of density. B. Tension C. It was derived by combining the other two equations. C. Buckling D. It is a fundamental law of kinematics. D. Bending E. It is required by the International Bicycle E. Torsion Racing Union. 9. In which mode does a column carry a load? 3. How is Equation (3) obtained? A. Compression A. It was found in a handbook. B. Tension B. It was derived from the geometry of the sys- C. Buckling tem and the definition of density. D. Bending C. It was derived by combining the other two E. Torsion equations. D. It is a fundamental law of kinematics. [Continuedl E. The Supreme Court established it in Med- ford v. ReynoldsExplanation / Answer
1. B Moment depends on the geometry
2.A It is a general equation
3.A It is a general equation
4.B Stiffness is the load required to deflect it by one unit.
5.E Minimise stiffnes for reducing weight
6.E Same as 5
7.C Definition
8.D
9.C
10.B
11.D
12.B
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