design of masonry structures MCQs – Page 2

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

design of masonry structures Mcqs

21. Maximum slenderness ratio of load bearing walls for a dwelling having more than 2 storeys________________?
0

A. correct statments is ?

B. shall not exceed 18 if cement lime mortar 1:2:9 is used

C. shall not exceed 12 if lime mortar is used

D. ) shall not exceed 24 if cement mortar 1:6 is used</strong>

22. Which of the following will give higher ratio of brickwork strength to mortar strength ?
0

A. 1 : % : 3

B. 1:01:06

C. 1:2:9

D. 1 : Vz: 4>/2

23. Minimum compressive strength in N/mm2 for H1 type mortar used for masonry is_______________?
0

A. 10

B. 3

C. 5

D. 7.5

24. For earthquake resistant masonry buildings, where seismic coefficient is less than 0.08, the horizontal distance between two openings shall not be less than_________________?
0

A. Ax height of shorter opening

B. Vt x height of shorter opening

C. Vi x height of longer opening

D. Vt x height of longer opening

25. The effective height of free standing nonload bearing wall and column respectively will be_________________?
0

A. 2.0H and 2.0H

B. 1.OH and 1.OH

C. 1.5Handl.5H

D. 2.0Handl.5H

26. Cement mortars richer than 1 : 3 are not used in masonry because_________________?
0

A. there is high shrinkage

B. there is no gain in strength of masonry

C. ) they are prone to segregation</strong>

D. ect the correct statements?

27. 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?
0

A. ect your answer according to the codes given below.

28. 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.
0

A. ect your answer according to the codes given below.

B. Both A and R are true and R is the correct explanation of A.

C. Both A and R are true but R is not the correct explanation of A.

D. A is true but R is false.

E. A is false but R is true.

29. In a cavity wall, both leaves of which are load bearing, the effective thickness is taken as________________?
0

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)

30. The thickness of each leaf of a cavity wall shall not be less than_________________?
0

A. 5 cm

B. 15 cm

C. 7.5 cm

D. 10 cm

31. For earthquake resistant masonry buildings, the vertical distance between openings one above the other in a load bearing wall shall not be less than_________________?
0

A. 60 cm

B. 50 cm

C. 75 cm

D. 100 cm

32. The mode of failure of a very short masonry member having h/t ratio of less than 4 is by _______________?
0

A. any of the above

B. buckling

C. shear

D. vertical tensile splitting

33. 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

A. greater than 1

B. between 0 and 1

C. 1

D. 0

34. A 200 mm thick brick masonry wall made of modular bricks carries an axial load of 30 kN/m from wall above and an eccentric load of 20 kN/m from RCC floor acting at a distance of 47.5 mm from the centre line of the wall. The resultant eccentricity ratio is A. B. C. D. ?
0

A. 95

B. 90

C. 100

D. 5

35. 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________________?
0

A. 20

B. 15

C. 19

D. 25

36. The timber floor not spanning on the masonry wall but properly anchored to the wall gives________________?
0

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

37. The basic stress in masonry units having height to width ratio of 1.5 may be increased by a factor of_________________?
0

A. 2

B. 1.4

C. 1.6

D. 1.2

38. If H is the height of wall between centers of supports, then the effective height of wall where concrete floors have a bearing on wall irrespective of the direction of span will be________________?
0

A. 1.0 H

B. 0.85 H

C. 1.5 H

D. 0.75 H

39. The bending stress in a wall or column subjected to effective vertical load need not be considered, if the eccentricity ratio is_________________?
0

A. less than or equal to 1/24

B. more than 1/24

C. less than or equal to 1/6

D. less than or equal to 1/12

40. Rich cement mortars are more liable to cracking as compared to lean mortars because rich mortars have________________?
0

A. high shrinkage

B. less strength

C. both (A) and (B)

D. none of above

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