90 



QUESTIONS AND PROBLEMS. CHAPTER V. 



13. What is the bending moment at the middle of a beam 

 of span L, carrying a uniform load TF? What the shear? 



14. What is the bending moment in a beam of 20 ft. span 

 at 4 ft. from one support for a uniform load of 400 Ibs. per ft.? 

 What the shear? 



15. In the method of sections, the sections are taken so as 

 to cut how many members? Where are the centers of moments 

 taken? 



16. In Fig. 57, take a section and write a moment equation 

 for the stress in BC. 



17. Find the stresses in the truss of Fig. 50 by the algebraic 

 method of sections. 



18. Find the stresses in the truss of Fig. 61 by the algebraic 

 method of sections for the data given in Problem 4. 



19. Calculate U 2 and V 2 , Fig. 52, by the method of sections. 



20. Find U 2 , I> 4 , and L 2 , Fig. 61, for the data given in 

 problem 4, by Culmann's method. 



21. For the same data as above, find the chord stresses 

 by the method of Art. 61. 



22. Find, graphically, the maximum moment in the beam 

 of Fig. 42, for loads of 18, 40, and 24 in place of 20, 15, and 10, 

 respectively. 



23. Find the stresses in the truss of problem 6, by the 

 algebraic method of sections. 



