DESIGN OF MASONRY STRUCTURES QUIZ

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

Vertical tensile splitting

Any of the above

Buckling

Shear

TRUE ANSWER : ?
YOUR ANSWER : ?

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 3 are correct

1 and 2 are correct

1, 2 and 3 are correct

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YOUR ANSWER : ?

If the horizontal cross-sectional area of a wall is 1200 cm², then the basic stress shall be multiplied by a reduction factor equal to

0.6

0.95

0.85

0.75

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YOUR ANSWER : ?

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

High shrinkage

Less strength

None of above

Both (A) and (B)

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For earthquake resistant masonry buildings, the vertical distance between openings one above the other in a load bearing wall shall not be less than

100 cm

60 cm

75 cm

50 cm

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YOUR ANSWER : ?

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

Larger of (B) and (C)

Actual thickness of the stronger leaf

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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

(i) and (ii) are correct

(ii) and (iii) are correct

Only (ii) is correct

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

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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

19

25

20

15

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Consider the following statements regarding bands to be provided for strengthening masonry work in masonry buildings constructed in zone III, IV and V.<br/>(i) Lintel band is provided at lintel level on partition walls,<br/>(ii) Gable band is provided at top of gable masonry below the purlins,<br/>(iii) The bands shall be to full width of the wall and not less than 7.5 cm in depth,<br/>(iv) The bands shall be made of reinforced concrete only.<br/>of these statements, the correct statements are

(i) and (iii)

(ii) and (iii)

(i) and (ii)

(ii) and (iv)

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Consider the following statements regarding provision of chases in masonry,<br/>(i) No chase should be permitted in a half brick load-bearing wall,<br/>(ii) Vertical chases should not be closer than 2 m in any stretch of a wall,<br/>(iii) Chases should be provided near to bearings of beams and lintels.

(i) and (ii) are correct

(i) and (iii) are correct

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

(ii) and (iii) are correct

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