DESIGN OF MASONRY STRUCTURES QUIZ

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

6 %

5 %

7 %

4 %

TRUE ANSWER : ?
YOUR ANSWER : ?

Assertion A : For identical strength, a composite cement-lime mortar is preferred over cement mortar.Reason R : Composite cement-lime mortar has higher drying shrinkage than cement mortar.Select your answer based on the codes given below. Codes:

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

A is true but R is false

A is false but R is true

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

TRUE ANSWER : ?
YOUR ANSWER : ?

Minimum compressive strength in N/mm² for H1 type mortar used for masonry is

3

5

10

7.5

TRUE ANSWER : ?
YOUR ANSWER : ?

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

0.09

0.095

0.105

0.1

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 1/12

Less than or equal to 1/6

Less than or equal to 1/24

More than 1/24

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 3

2 and 3

1 and 2

1, 2 and 3

TRUE ANSWER : ?
YOUR ANSWER : ?

Direct load carrying capacity of a brick masonry wall standing freely as against when it supports RC slab will be

Less

More

100 %

The same in both the cases

TRUE ANSWER : ?
YOUR ANSWER : ?

If the eccentricity ratio is more than 1/24, then increase in the permissible stress in the design of wall subjected to eccentric loading as per code is

10 %

33? %

50 %

25 %

TRUE ANSWER : ?
YOUR ANSWER : ?

The basic stress in masonry units having height to width ratio of 1.5 may be increased by a factor of

1.2

2

1.6

1.4

TRUE ANSWER : ?
YOUR ANSWER : ?

Assertion A : For eccentricity ratio exceeding 1/6, effective thickness of masonry will get reduced.<br/>Reason R : For eccentricity ratio exceeding 1/6, there will be tension on one side of the member.<br/>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

A is true but R is false

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

TRUE ANSWER : ?
YOUR ANSWER : ?

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