Design of Masonry Structures MCQ Civil Engineering

50 Questions 30 Mins

Following are some of the multiple choice questions on the Design of Masonry Structures with answers that will help the students in developing their knowledge.

Design of Masonry Structures MCQ

1. 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. Select your answer according to codes given below:

• Both A and R is true and R is the correct explanation of A
• Both A and R is true but R is not the correct explanation of A
• A is true but R is false
• A is false but R is true

• 4 %
• 5 %
• 6 %
• 7 %

• 0.6
• 0.75
• 0.85
• 0.95

• 0.75 H
• 0.85 H
• 1.0 H
• 1.5 H

5. Cement mortars richer than 1 : 3 are not used in masonry because(i) There is no gain in strength of masonry(ii) There is high shrinkage(iii) They are prone to segregation

• Only (ii) is correct
• (i) and (ii) are correct
• (ii) and (iii) are correct
• (i), (ii) and (iii) are correct

• 10 %
• 25 %
• 33? %
• 50 %

• 0.090
• 0.095
• 0.100
• 0.105

8. The bending stress in a wall or column subjected to effective vertical load need not be considered, if the eccentricity ratio is

• Less than or equal to 1/24
• Less than or equal to 1/6
• More than 1/24
• Less than or equal to 1/12

• 1, 2 and 3
• 1 and 2
• 2 and 3
• 1 and 3

10. Assertion A : Lime based mortars give higher ratio of brickwork strength to mortar strength as compared to non-lime mortar.Reason R : Lime based mortars have lower bond strength as compared to non-lime mortars.Select your answer according to the codes given below:

• Both A and R is true and R is the correct explanation of A
• Both A and R is true but R is not the correct explanation of A
• A is true but R is false
• A is false but R is true

11. If the ratio of center to center spacing of intersecting walls to actual thickness of intersecting wall is more than 20, then the stiffening coefficient for wall proper will be

• 0
• Between 0 and 1
• 1
• Greater than 1

12. Assertion A : Limiting value of slenderness ratio for a column is less than that of a wall.Reason R : A column can buckle around either of the two horizontal axes while a wall can buckle around only one axis.Select your answer according to the codes given below:

• Both A and R is true and R is the correct explanation of A
• Both A and R is true but R is not the correct explanation of A
• A is true but R is false
• A is false but R is true

13. Consider the following statements: The use of relatively weak mortar 1. Will accommodate movements due to loads and, cracking if any, and will be distributed as thin hair cracks which are less noticeable or harmful. 2. Will result in reduction of stresses due to differential expansion of masonry units.

• 1 alone is correct
• 2 alone is correct
• Both 1 and 2 are correct
• Neither 1 nor 2 is correct

14. The effective height of free standing non-load bearing wall and column respectively will be

• 1.0H and 1.0H
• 1.5H and 1.5H
• 2.0H and 1.5H
• 2.0H and 2.0H

15. Rich cement mortars are more liable to cracking as compared to lean mortars because rich mortars have

• High shrinkage
• Less strength
• Both (A) and (B)
• None of above

• 0.15 MPa
• 0.125 MPa
• 0.1 MPa
• 0.075 MPa

17. Direct load carrying capacity of a brick masonry wall standing freely as against when it supports RC slab will be

• More
• Less
• The same in both the cases
• 100 %

18. Maximum slenderness ratio of load bearing walls for a dwelling having more than 2 storeys(i) Shall not exceed 12 if lime mortar is used(ii) Shall not exceed 18 if cement lime mortar 1 : 2 : 9 is used(iii) Shall not exceed 24 if cement mortar 1 : 6 is used

• (i) and (ii) are correct
• (ii) and (iii) are correct
• (i) and (iii) are correct
• (i) and (ii) and (iii) are correct

19. The timber floor not spanning on the masonry wall but properly anchored to the wall gives

• Lateral restraint but not rotational restraint
• Rotational restraint but not lateral restraint
• Both lateral and rotational restraints
• Neither lateral nor rotational restraint

20. 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.Select your answer based on the codes given below. Codes:

• Both A and R is true and R is the correct explanation of A
• Both A and R is true but R is not a correct explanation of A
• A is true but R is false
• A is false but R is true

21. 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?

• Providing buttresses at certain intervals
• Providing a deeper foundation
• Using a richer mortar
• Using stronger bricks

• 5 to 8 cm
• 9 to 13 cm
• 14 to 18 cm
• 19 to 23 cm

• 10 cm
• 15 cm
• 20 cm
• 30 cm

• 5 cm
• 7.5 cm
• 10 cm
• 15 cm

• 50 %
• 60 %
• 70 %
• 80 %

• 50 cm
• 60 cm
• 75 cm
• 100 cm

27. For earthquake resistant masonry buildings, where seismic coefficient is less than 0.08, the horizontal distance between two openings shall not be less than

• Vt x height of shorter opening
• Vt x height of longer opening
• Ax height of shorter opening
• Vi x height of longer opening

• 0.4 kg/cm²
• 0.7 kg/cm²
• 1.0 kg/cm²
• 1.2 kg/cm²

29. Full restraint is provided by(i) Foundation footing of a wall(ii) Timber floor spanning on the wall and anchored to the wall(iii) RCC slab with a minimum bearing of 10 cm on the wall

• (i) and (iii) are correct
• (i) and (ii) are correct
• (ii) and (iii) are correct
• (i), (ii) and (iii) are correct

30. Consider the following statements:A high lime content in a composite cement-lime mortar results in1. Slow hardening.2. Quick setting.3. Weaker mortar.

• 2 and 3 are correct
• 1 and 2 are correct
• 1 and 3 are correct
• 1, 2 and 3 are correct

• 0.64 m
• 0.96 m
• 1.28 m
• 1.5 m

32. 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:

• Both A and R is true and R is the correct explanation of A
• Both A and R is true and R is not the correct explanation of A
• A is true but R is false
• A is false but R is true

33. 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

• (i) and (ii)
• (i) and (iii)
• (ii) and (iv)
• (ii) and (iii)

34. 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.

• (i) and (ii) are correct
• (i) and (iii) are correct
• (ii) and (iii) are correct
• (i), (ii) and (iii) are correct

• 1.2
• 1.4
• 1.6
• 2.0

• 3
• 5
• 7.5
• 10

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

• Zone I only
• Zone I and II
• Zone I, II and III
• Zone I, II, III and IV

• 15
• 19
• 20
• 25

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

• Sum of thickness of both leaves
• Two-third of the sum of thickness of both the leaves
• Actual thickness of the stronger leaf
• Larger of (B) and (C)

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

• Shear
• Vertical tensile splitting
• Buckling
• Any of the above