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(A), , Fill in the Blanks, is the axis at which the, , 2. In working, , stress method,, , stresses are, , factor of, , zero., , is, , safety, , to, , aPplied, , characteristic, , strengths, , to get, , stresses., , 3. For, , concrete,, , the value of factor of, , 4. The neutral axis of, , is, , safety, , balanced section is called, , a, , as, , critical neutral axis., , axis is, 5. In under reinforced section, actual neutral, , sections are preferred by designers., in over-reinforced sections., , 7. Failure is, , 8. The distance between resultant compressive and tensile force is called as, , 9. In the transformed section, steel, 10., , Working, , stress, , method, , assumes, , area, , A, , is, , equivalent, , that steel and, , area of concrete., , to, , concrete are, , degrees., , 11. Diagonal tension cracks are at, , 12. Shear reinforcement provided in the form of vertical bars is known as, , 13. Shear force is equal to the rate of change of, , 14. Flexural cracks are at, degrees., 15. Nominal shear stress (T,) is equal to, 16. Shear force results in, , tension near the supports., , 17. Shear strength of concrete depends upon, 18. Maximum spacing of shear stirrups is, , and, , whichever is less., , or, , 19. Some of the main tensile bars can be bent up near the supports to take, , 20. Bars can be bent up near the supports at an angle not less than, should be perfect., , 21. For a good composite action in R.C.C.,, , 22. HYSD bars have, , %more bond, , stress than, , plane, , mild steel bars., , 23. If t,> Te max then the 'section is to be, , 24., , If T,< T, , then, , shear reinforcement is to be provided as per code., , 25. The permissible bond stress in compression is, , more than that in tension., 26. The diagonal tension failure occurs when shear force is very large as compared to, , (B) State True/False, 1. The working stress method is based on the elastic theory of bending., 2. Over-reinforced sections are preferred over under reinforced section., 3. The working stress method assumes that stress is directly proportional to strain., , 4. For under-reinforced section, actual neutral axis lies above critical neutral axis., 5. The neutral axis depth factor (k) depends upon the grade of concrete and steel., , 6. Under-reinforced section gives sufficient warning before failure., 7. Bending stresses are maximum at the neutral axis., 8. Fe 250 has permissible stress equal to 250 N/mm., , 9. The value of modular ratio depends upon the type of steel., , 10. In an over-reinforced section, concrete is fully stressed., 11. Diagonal tension is caused by the shear force.

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12. Shear stress is maximum at the top and bottom fibre., 13. Bent up bars can be used alone as shear reinforcement., , 14. The diameter of stirrups varies from 6 mm to 16 mm., , 15. Diagonal tension cracks are inclined at 45°, near the supports., 16. Flexure cracks are horizontal., , 17. Shear strength of concrete beam depends upon the percentage of tensile reinforcement., 18. If t, <t, then, no shear reinforcement is not provided in the, , 19. IS code recommends the use of nominal shear stress (T,)., , 20. The minimum spacing of shear stirrups shall not exceed 0.75d or 300 mm., , (C) Multiple Choice Questions, 1. The modular ratio m is given by, , (a), , 280, , 280, , (b) 30 st, , 30 cbc, 280, , (c) 50 be, , (d), , 280, O cbc, , 2. If the depth of actual neutral axis is more than critical neutral axis, the section is, (a) Balanced, , (b) Over-reinforced, , (c) Under-reinforced, , (d) Transformed, , 3. Design constants (k, j and R) depend upon, (6) Type of steel, (a) Grade of concrete, (d) None of the above, , (c) a and b, 4. Value of factor of safety for concrete is, (a) 5.0, , (b) 2.0, , (c) 1.5, , (d) 3.0, , 5. The moment of resistance of an over-reinforced section is, , (a) Equal, (c) More, , to balanced section, , b) Less than balanced section, , than balanced section, , (d) Less than under-reinforced section, , 6. In an under-reinforced section, , (a), , Concrete is, , fully stressed, , (c)Both (a) and (b), , (b) Steel is fully stressed, (d) None of the above, , 7. The neutral axis of a balanced section is called as, , (a), (c), , Normal neutral axis, , (b) Actual neutral axis, , Balanced neutral axis, , (d) Critical neutral axis, , 8. For Fe 415 steel, permissible stress is, , (a) 250 N/mm, 2, (c) 230 N/mm, , (b) 150 N/mm, (d) 200 N/mm, , 9. The moment of resistance ofa balanced section is given by, , (b), , (d)

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depth factor, , depth, , axis, N, , e, , u, , t, , r, , (b), None, , called, , is, 10. k, , d, , as, , of, , above, , the, , (b), , maximnum, , i, iss, , moment, factor, , l, , maximum, , factor, arm, , a, , s, o, so, , the cracks are, , H, , Horizontal, , Lever, , (a), , m o m e n t, , bending, , the, , Resisting, , (c), , (d) At 60, , midspan,, , the, near, , 11., , 1., , or, , At, , form, , (a), , Vertical, , in, , (c) Atr e45, is, inforcement, , (b), , p r o v i d e d, , (d), , Shear, , 12., , (a), , Vertical stirrups, , (c), , Inclined stirrups, , of, barss, , the, , up, above, of the, , Bent, , All, is, , supports,, , The, (a), , spacing, , of, , stirrups,, , maximum, , Minimum, m i n i m u m, , (, , c, , ), , B, , e, , t, , w, , e, , e, , Shear, , taken, , and, , n, , (d) Zero, 14., , Maximum, , near, , (c), 13., , the, , (b), , by, , bent, , up, , bars, , is, , limited, , to, , V, (b), , (a)V,, , (d) 2V,, reinforcement, , of, 15. The spacing, , (a), , nominal shear, , 0.87f,Ay, 0.4d, , (a), , by, , 0.25b, , 0.87 f,As, (d), , 0.25d, , 16. Shear taken, , by, , 0.87 f,Ay, (b), , 0.87 f,Av, (c), , is given, , bent up bars is, , y.A, . sin a, , (c) gyA, tan a, , 0.4b, , given by, , (b) gy A, .cos a, (d) gyAy sin, , a, , 17. Shear reinforcement is provided to resist, , (a) Diagonal compression, (c) Diagonal tension, , (b) Diagonal bending, (d) None of the above