Design of Masonry Structures Objective Questions

Practice Test: Question Set - 03


1. 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
Of these statements
    (A) (i) and (iii) are correct
    (B) (i) and (ii) are correct
    (C) (ii) and (iii) are correct
    (D) (i), (ii) and (iii) are correct

2. Consider the following statements:
A high lime content in a composite cement-lime mortar results in
  1. Slow hardening.
  2. Quick setting.
  3. Weaker mortar.
Of these statements
    (A) 2 and 3 are correct
    (B) 1 and 2 are correct
    (C) 1 and 3 are correct
    (D) 1, 2 and 3 are correct

3. The effective height of free standing non-load bearing wall and column respectively will be
    (A) 1.0H and 1.0H
    (B) 1.5H and 1.5H
    (C) 2.0H and 1.5H
    (D) 2.0H and 2.0H
Where H is the height of wall or column between centers of supports

4. 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:
    (A) Both A and R is true and R is the correct explanation of A
    (B) Both A and R is true but 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. 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:
    (A) Both A and R is true and R is the correct explanation of A
    (B) Both A and R is true but R is not the correct explanation of A
    (C) A is true but R is false
    (D) A is false but R is true

6. 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) 0.090
    (B) 0.095
    (C) 0.100
    (D) 0.105

7. The thickness of each leaf of a cavity wall shall not be less than
    (A) 5 cm
    (B) 7.5 cm
    (C) 10 cm
    (D) 15 cm

8. Minimum compressive strength in N/mm² for H1 type mortar used for masonry is
    (A) 3
    (B) 5
    (C) 7.5
    (D) 10

9. Direct load carrying capacity of a brick masonry wall standing freely as against when it supports RC slab will be
    (A) More
    (B) Less
    (C) The same in both the cases
    (D) 100 %

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. Select your answer according to the codes give below:
    (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

11. Minimum thickness of stiffening wall for 1 to 3 storeys shall not be less than
    (A) 10 cm
    (B) 15 cm
    (C) 20 cm
    (D) 30 cm

12. 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
Of these statements
    (A) Only (ii) is correct
    (B) (i) and (ii) are correct
    (C) (ii) and (iii) are correct
    (D) (i), (ii) and (iii) are correct

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Item Reviewed: Design of Masonry Structures Objective Questions Rating: 5 Reviewed By: Pranab Debnath
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