DESIGN OF MASONRY STRUCTURES QUIZ

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

1.4

1.6

1.2

2

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

A is true but R is false

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

TRUE ANSWER : ?
YOUR ANSWER : ?

Consider the following statements: The use of relatively weak mortar<br/>1. Will accommodate movements due to loads and, cracking if any, and will be distributed as thin hair cracks which are less noticeable or harmful.<br/>2. Will result in reduction of stresses due to differential expansion of masonry units.

2 alone is correct

Both 1 and 2 are correct

1 alone is correct

Neither 1 nor 2 is correct

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?

1 and 2

1 and 3

1, 2 and 3

2 and 3

TRUE ANSWER : ?
YOUR ANSWER : ?

For strengthening a 50 m long and 5 m high straight compound wall built in brick work, which one of the following would be most suitable?

Providing a deeper foundation

Providing buttresses at certain intervals

Using stronger bricks

Using a richer mortar

TRUE ANSWER : ?
YOUR ANSWER : ?

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

7.5

5

3

10

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

5 %

7 %

6 %

4 %

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Buckling

Any of the above

Vertical tensile splitting

Shear

TRUE ANSWER : ?
YOUR ANSWER : ?

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:

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

A is true but R is false

A is false but R is true

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

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

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

Only (ii) is correct

(ii) and (iii) are correct

TRUE ANSWER : ?
YOUR ANSWER : ?

↑