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Civil Engineering :: Design of Masonry Structures

  1. For strengthening a 50 m long and 5 m high straight compound wall built in brick work, which one of the following would be most suitable?

  2. A.

     Providing buttresses at certain intervals

    B.

     Providing a deeper foundation

    C.

     Using a richer mortar

    D.

     Using stronger bricks


  3. Assertion A : For eccentricity ratio exceeding 1/6, effective thickness of masonry will get reduced.
    Reason R : For eccentricity ratio exceeding 1/6, there will be tension on one side of the member.
    Select your answer according to the codes give below:

  4. A.

     Both A and R is true and R is the correct explanation of A

    B.

     Both A and R is true and R is not the correct explanation of A

    C.

     A is true but R is false

    D.

     A is false but R is true


  5. Consider the following statements regarding bands to be provided for strengthening masonry work in masonry buildings constructed in zone III, IV and V.
    (i) Lintel band is provided at lintel level on partition walls,
    (ii) Gable band is provided at top of gable masonry below the purlins,
    (iii) The bands shall be to full width of the wall and not less than 7.5 cm in depth,
    (iv) The bands shall be made of reinforced concrete only.
    of these statements, the correct statements are

  6. A.

     (i) and (ii)

    B.

     (i) and (iii)

    C.

     (ii) and (iv)

    D.

     (ii) and (iii)


  7. Consider the following statements regarding provision of chases in masonry,
    (i) No chase should be permitted in a half brick load-bearing wall,
    (ii) Vertical chases should not be closer than 2 m in any stretch of a wall,
    (iii) Chases should be provided near to bearings of beams and lintels.

  8. A.

     (i) and (ii) are correct

    B.

     (i) and (iii) are correct

    C.

     (ii) and (iii) are correct

    D.

     (i), (ii) and (iii) are correct


  9. The basic stress in masonry units having height to width ratio of 1.5 may be increased by a factor of

  10. A.

     1.2

    B.

     1.4

    C.

     1.6

    D.

     2.0


  11. Minimum compressive strength in N/mm² for H1 type mortar used for masonry is

  12. A.

     3

    B.

     5

    C.

     7.5

    D.

     10


  13. For designing masonry components of a structure, seismic forces provision in the design calculation is not necessary for buildings constructed in

  14. A.

     Zone I only

    B.

     Zone I and II

    C.

     Zone I, II and III

    D.

     Zone I, II, III and IV


  15. A 200 mm thick wall made of modular bricks is 5 m long between cross walls and 3.8 m clear height between RCC slabs at top and bottom. The slenderness ratio of the wall is

  16. A.

     15

    B.

     19

    C.

     20

    D.

     25


  17. In a cavity wall, both leaves of which are load bearing, the effective thickness is taken as

  18. A.

     Sum of thickness of both leaves

    B.

     Two-third of the sum of thickness of both the leaves

    C.

     Actual thickness of the stronger leaf

    D.

     Larger of (B) and (C)


  19. The mode of failure of a very short masonry member having h/t ratio of less than 4 is by

  20. A.

     Shear

    B.

     Vertical tensile splitting

    C.

     Buckling

    D.

     Any of the above