11. The basic stress in masonry units having height to width ratio of 1.5 may be increased by a factor of_________________?
A. 1.2
B. 1.4
C. 1.6
D. 2.0
✅ The correct answer is option C.
Design of Masonry Structures MCQs
12. Rich cement mortars are more liable to cracking as compared to lean mortars because rich mortars have________________?
A. high shrinkage
B. less strength
C. both (A) and (B)
D. none of above
✅ The correct answer is option A.
13. Water retentivity for brick masonry should not be less than__________________?
A. 50%
B. 60%
C. 70%
D. 80%
✅ The correct answer is option C.
14. 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________________?
A. 15
B. 19
C. 20
D. 25
✅ The correct answer is option A.
15. The effective height of free standing nonload bearing wall and column respectively will be_________________?
A. 1.OH and 1.OH
B. 1.5Handl.5H
C. 2.0Handl.5H
D. 2.0H and 2.0H
✅ The correct answer is option D.
16. The mode of failure of a very short masonry member having h/t ratio of less than 4 is by _______________?
A. shear
B. vertical tensile splitting
C. buckling
D. any of the above
✅ The correct answer is option A.
17. In a cavity wall, both leaves of which are load bearing, the effective thickness is taken as________________?
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)
✅ The correct answer is option D.
18. 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_______________?
A. 0.15 MPa
B. 0.125 MPa
C. 0.1 MPa
D. 0.075 MPa
✅ The correct answer is option A.
19. Minimum compressive strength in N/mm2 for H1 type mortar used for masonry is_______________?
A. 3
B. 5
C. 7.5
D. 10
✅ The correct answer is option D.
20. The timber floor not spanning on the masonry wall but properly anchored to the wall gives________________?
A. lateral restraint but not rotational restraint
B. rotational restraint but not lateral restraint
C. both lateral and rotational restraints
D. neither lateral nor rotational restraint
✅ The correct answer is option A.