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13. A beam is simply support at the ends and is continuous

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13. A beam is simply support at the ends and is continuous over two spans. The left-hand span is 16 ft and the right- hand span is 20 ft. The beam supports a uniform load of 900 plf, which includes its own weight, over the entire 36 ft and also a concentrated load of 10,000 lb applied at a point that is 5 ft from the left-hand end of the beam. Determine the bending moment at the intermediate support due to the uniform load only. -

A. -38.600 ft·lb B. -37,8OO ft-Ib C. -36,500 ft Ib D. -35,200 ft-lb

14. For the beam described in Question 13, determine the bending moment at the intermediate support due to the concentrated load only.

A. -13,264 ft·lb B. -12,086 ft·lb C. -11,874 ft lb D. -10,026 ft-Ib

15. If the concentrated load on the beam described in Question 13 is reduced to 8000 lb, the total bending moment at the intermediate support due to the uniform load and the concentrated load is equal to -45.820 ft-lb and the reaction at the left-hand support is

A. 10,936 lb. B. 9836 lb. C. 8914 lb. D. 8116 lb.

16. For the conditions described in Question 15, the reaction at the right-hand support is

A. 7139 lb. B. 6929 lb. C. 6709 lb. D. 6519 lb.

17. For the conditions described in Question 15, the reaction at the intermediate support is

A. 25,135 lb. B. 24,555 lb. C. 23,855 lb. D. 22,935 lb.

18. In a simply supported beam, the maximum bending moment occurs at the point where

A. the shear is maximum regardless of sign. B. the shear changes sign. C. the positive shear is maximum. D. the negative shear is maximum.

19. An inflection point in a beam is located at a point

A. under a concentrated load... B. over 8 support.. C. where the bending moment is zero D. where the shear is maximum

20. The maximum bending moment that two unequal concentrated loads can possibly produce in a simple span occurs when the center of the span is exactly halfway between the heavier load and the resultant of both loads. This maximum bending moment will be located

A. under the heavier load. B. under the lighter load. C. at the center of the span. D. under the resultant of the two loads.

21. Which one of the following cannot have negative bending moment under normal conditions of vertical loading?

A. A continuous beam B. An overhanging beam C. A simple beam D. A cantilever beam

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