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design of masonry structures MCQs

Practise focused design of masonry structures questions with marked answers for exam preparation and subject revision.

design of masonry structures Mcqs
1. Consider the following statements regarding bands to be provided for strengthening masonry work in masonry buildings constructed in zone III, IV and V?
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A. ) Gable band is provided at top of gable masonry below the purlins,

B. i) The bands shall be to full width of the wall and not less than 7.5 cm in depth,

C. ) The bands shall be made of reinforced concrete only. </strong>

D. Lintel band is provided at lintel level on partition walls,
2. A free standing brick wall 20 cm thick is subjected to a wind pressure of 75kg/m2. The maximum height of wall from stability consideration is___________________?
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A. 1.28 m

B. 1.5 m

C. 0.64 m

D. 0.96 m

3. A high lime content in a composite cement-lime mortar results in______________?
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A. sider the following statements.

B. weaker mortar.</strong>

C. ect the correct statements.

D. slow hardening.

E. quick setting.

4. Water retentivity for brick masonry should not be less than__________________?
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A. 80%

B. 60%

C. 70%

D. 50%

5. Consider the following statements?
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A. ch of these statements are correct?

B. Masonry in rich cement mortar though having good strength with high shrinkage is much liable for surface cracks.

C. Lime mortar possesses poor workability and poor water retentivity and also suffers high shrinkage.

D. Masonry in lime mortar has better resistance against rain penetration and is less liable to crack when compared to masonry in cement mortar.</strong>

6. In the case of panel wall subjected to horizontal loads at right angles to the plane of the wall, with the mortar not leaner than Ml type, tensile stress in bending in the vertical direction may be allowed to the extent of _______________?
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A. 0.4 kg/cm2

B. 1.2 kg/cm2

C. 0.7 kg/cm2

D. 1.0 kg/cm2
7. If the eccentricity ratio is more than 1/24, then increase in the permissible stress in the design of wall subjected to eccentric loading as per code is_________________?
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A. 25%

B. 50%

C. 10%

D. 33.33%

8. For designing masonry components of a structure, seismic forces provision in the design calculation is not necessary for buildings constructed in________________?
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A. Zone I, II, III and IV

B. Zone I, II and III

C. Zone I only

D. Zone I and II
9. Minimum thickness of stiffening wall for 1 to 3 storeys shall not be less than_______________?
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A. 20 cm

B. 10 cm

C. 15 cm

D. 30 cm

10. 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?
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A. ect your answer according to the codes give below.

11. 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?
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A. using stronger bricks

B. providing buttresses at certain intervals

C. using a richer mortar

D. providing a deeper foundation

12. Assertion A : For identical strength, a composite cement-lime mortar is preferred over cement mortar. Reason R : Composite cement-lime mortar has higher drying shrinkage than cement mortar_____________?
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A. ect your answer based on the codes given below Codes?

13. The use of relatively weak mortar_______________?
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A. sider the following statements.

B. will result in reduction of stresses due to differential expansion of masonry units.</strong>

C. will accommodate movements due to loads and, cracking if any, and will be distributed as thin hair cracks which are less noticeable or harmful.
14. Full restraint is provided by__________________?
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A. foundation footing of a wall

B. ) RCC slab with a minimum bearing of 10 cm on the wall </strong>

C. ect the correct statment.

D. timber floor spanning on the wall and anchored to the wall

15. The mortars used for masonry construction are classified based on strength in IS 2250 and IS 1905 according to their designations L1,L2, H1, H2, M, M2.
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A. correct sequence of increasing order of their strengths is?

16. Consider the following statements regarding provision of chases in masonry_________________?
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A. No chase should be permitted in a half brick load-bearing wall,

B. i) Chases should be provided near to bearings of beams and lintels.</strong>

C. ect the the statements ?

D. ) Vertical chases should not be closer than 2 m in any stretch of a wall,

17. For masonry built in 1:1:6 cement-lime-sand mix mortar or equivalent, the horizontal shear stress permissible on the area of a mortar bed joint is_______________?
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A. 0.15 MPa

B. 0.1 MPa

C. 0.075 MPa

D. 0.125 MPa

18. Direct load carrying capacity of a brick masonry wall standing freely as against when it supports RC slab will be___________________?
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A. more

B. less

C. the same in both the cases

D. 100%

19. Where a structural component or a system is providing lateral support to five or more walls or columns, the lateral load to be resisted may be taken as_______________?
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A. 5 percent

B. 7 percent

C. 6 percent

D. 4 percent

20. Assertion A : From consideration of structural soundness and economy of design, most codes control the maximum slenderness ratio of masonry walls and columns. Reason R : By controlling the maximum slenderness ratio, failure is by excessive stress and not by buckling.?
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A. ect your answer according to codes given below.