DESIGN OF MASONRY STRUCTURES QUIZ

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), (ii) and (iii) are correct

(i) and (iii) are correct

(ii) and (iii) are correct

(i) and (ii) are correct

TRUE ANSWER : ?
YOUR ANSWER : ?

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 is true but R is false

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

Both A and R is true and R is the correct explanation of A

A is false but R is true

TRUE ANSWER : ?
YOUR ANSWER : ?

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

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

Only (ii) is correct

TRUE ANSWER : ?
YOUR ANSWER : ?

In the case of panel wall subjected to horizontal loads at right angles to the plane of the wall, with the mortar not leaner than Ml type, tensile stress in bending in the vertical direction may be allowed to the extent of

0.7 kg/cm²

1.0 kg/cm²

0.4 kg/cm²

1.2 kg/cm²

TRUE ANSWER : ?
YOUR ANSWER : ?

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

0.125 MPa

0.15 MPa

0.075 MPa

0.1 MPa

TRUE ANSWER : ?
YOUR ANSWER : ?

Where a structural component or a system is providing lateral support to five or more walls or columns, the lateral load to be resisted may be taken as __________ of the total vertical load on the most heavily loaded wall or column in the group

7 %

5 %

4 %

6 %

TRUE ANSWER : ?
YOUR ANSWER : ?

Consider the following statements:<br/>1. Masonry in rich cement mortar though having good strength with high shrinkage is much liable for surface cracks.<br/>2. Lime mortar possesses poor workability and poor water retentivity and also suffers high shrinkage.<br/>3. Masonry in lime mortar has better resistance against rain penetration and is less liable to crack when compared to masonry in cement mortar.<br/>Which of these statements are correct?

1 and 2

1, 2 and 3

2 and 3

1 and 3

TRUE ANSWER : ?
YOUR ANSWER : ?

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

TRUE ANSWER : ?
YOUR ANSWER : ?

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

0.75 H

1.0 H

1.5 H

0.85 H

TRUE ANSWER : ?
YOUR ANSWER : ?

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

50 cm

60 cm

100 cm

75 cm

TRUE ANSWER : ?
YOUR ANSWER : ?

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