DESIGN OF MASONRY STRUCTURES QUIZ

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

Zone I, II and III

Zone I only

Zone I, II, III and IV

Zone I and II

TRUE ANSWER : ?
YOUR ANSWER : ?

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

20

15

25

TRUE ANSWER : ?
YOUR ANSWER : ?

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:

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 : ?

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

A is false but R is true

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

A is true but R is false

TRUE ANSWER : ?
YOUR ANSWER : ?

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) and (iii) are correct

(i) and (iii) are correct

(i) and (ii) are correct

(ii) and (iii) are correct

TRUE ANSWER : ?
YOUR ANSWER : ?

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 1/6

Less than or equal to 1/24

More than 1/24

Less than or equal to 1/12

TRUE ANSWER : ?
YOUR ANSWER : ?

Water retentivity for brick masonry should not be less than

70 %

50 %

80 %

60 %

TRUE ANSWER : ?
YOUR ANSWER : ?

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

2 and 3

1 and 3

1, 2 and 3

1 and 2

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Larger of (B) and (C)

Sum of thickness of both leaves

Actual thickness of the stronger leaf

Two-third of the sum of thickness of both the leaves

TRUE ANSWER : ?
YOUR ANSWER : ?

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 is false but R is true

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

TRUE ANSWER : ?
YOUR ANSWER : ?