2179-23605 D × MTHS learns.buffalo.edu/webapps/assessment/take/launch.jsp?course

Question

2179-23605 D × MTHS learns.buffalo.edu/webapps/assessment/take/launch.jsp?course assessment id-201386 1&course;_id-_147822 1 Question 1 For a simply supported beam with a uniformly distributed vertical (downwards) load, which of the following statements is true: OA The bottom of the beam will be in tension and the top of the beam will be in compression. 0 B. The beam will be in pure bending O C. The beam will bend about the longitudinal axis D. None of the aboe Question 2 The neutral axis (or surface): O A Is the line where the shear strain is always zero 0 B. Is the line where the normal stress is always zero ° C. Always passes through the centroid of the cross section Is the point where the bending moment changes from negative to positive

Explanation / Answer

1) Option A is correct. When applied load at top and downward, top part will be under compression and bottom part will be under tenssion.

2) Option B is correct. At neutral axis normal stress is zero. It is the only line which is not stressed.

3) Option D is correct. At the top and bottom it occurs. And it is the farthest from neutral axis.

4) Option B is correct. Because it satisfies minimum condition and less compared to others so, economical.

5)Option B is correct. At B maxximum tensiles stress occure when applied load as shown.

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