Structural Design Specifications Practice Questions - Set 06 - ObjectiveBooks

# Practice Test: Question Set - 06

1. Pick up the correct statement from the following:
(A) The distance between centers of two adjacent rivets in line with the direction of stress shall not exceed 16 t or 200 mm whichever is less in tension members
(B) The distance between the centers of two adjacent rivets in line with the direction of stress shall not exceed 12 t or 203 mm whichever is less in compression members
(C) The minimum pitch of rivets should not be less than 2.5 times the diameter of the rivet hole
(D) All the above

2. If fbt and fs are the numerical values of bending tension and shear stresses, the equivalent stress fe, is
(A) √(fbt2 + fs2)
(B) √(fbt + fs)
(C) √(fbt2 + 3fs2)
(D) √(fbt2 + 2fs2)

3. For concreting of heavily reinforced sections without vibration, the workability of concrete should be
(A) Very low
(B) Low
(C) Medium
(D) High

4. The distance of the critical section for shear from the periphery of the column or drop panel is at a distance (where d is effective depth of flat slab).
(A) d
(B) d/2
(C) d/3
(D) d/5

5. If D is the overall thickness of the slab, the diameter of the reinforcing bars should not exceed
(A) 1/4 × D
(B) 1/5 × D
(C) 1/6 × D
(D) 1/8 × D

6. For the proportions
(A) 1 : 1½ the maximum size of aggregates, is 10 mm
(B) 1 : 2 the maximum size of aggregates, is 20 mm
(C) 1 : 2½ the maximum size of aggregates, is 40 mm
(D) All the above

7. If the ratio of effective span to overall depth of a simply supported beam is equal or greater than 1 but less than or equal to 2, the lever arm, is
(A) 0.2 (l + 2D)
(B) 0.3 (l + 3D)
(C) 0.2 (l + 3D)
(D) 0.3 (l + 2D)

8. The value of the constant K in the formula AS = K.bd/fS for determining the minimum area of tension reinforcement in a beam is
(A) 0.95
(B) 0.90
(C) 0.85
(D) 0.80

9. The distance between, rivet line and the nearest edge of a joint not exposed to weather, is taken (where t is thickness in mm of the thinner outside plate).
(A) 6 t
(B) 8 t
(C) 10 t
(D) 12 t

10. The structure which is subjected to an imposed load after 72 hours for a period of 24 hours, is deemed to be unacceptable if it fails to recover the net deflection less than
(A) 90 %
(B) 85 %
(C) 80 %
(D) 75 %

11. In adverse circumstances, the reinforced concrete member immersed in sea water or subjected to sea spray, the maximum permissible cover for the reinforcing bars, should not exceed
(A) 40 mm
(B) 50 mm
(C) 70 mm
(D) 75 mm

12. The minimum length of the side or diameter of the column base shall not be less than (where d is the minimum diameter of the column).
(A) (d + 75) mm
(B) 1.2 (d - 75) mm
(C) 1.5 (d + 75) mm
(D) 1.6 (d + 75) mm

13. A solid slab spanning in two directions at right angles and carrying a uniformly distributed load is supported on beams. If the length of two such beams A and B perpendicular to each other are x and y (x<y), the load shared by the beam A, is
(A) ½ xy
(B) ⅓ xy
(C) ¼ x2
(D) ¼ y2

14. The thickness of flat single lacing is, taken (where l is effective length of the bar).
(A) l/20
(B) l/25
(C) l/30
(D) l/40

15. If b is actual width of a flange, Dt is the thickness of the flange, bÏ‰ is the breath of the web, lo is the distance between the points of zero moments in a beam, the effective width of the flange, is
(A) [lo/(lo/b) + 2] + bÏ‰
(B) [lo/(lo/b) + 3] + 2bÏ‰
(C) [lo/(lo/b) + 4] + bÏ‰
(D) [0.5lo/(lo/b) + 4] + bÏ‰

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