DESIGN OF MASONRY STRUCTURES QUIZ

Water retentivity for brick masonry should not be less than

60 %

70 %

80 %

50 %

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 3

1, 2 and 3

2 and 3

1 and 2

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

1.6

1.4

1.2

2

TRUE ANSWER : ?
YOUR ANSWER : ?

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 (iv)

(i) and (ii)

(ii) and (iii)

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

0.105

0.095

0.1

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.

1 alone is correct

Both 1 and 2 are correct

2 alone is correct

Neither 1 nor 2 is correct

TRUE ANSWER : ?
YOUR ANSWER : ?

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

(ii) and (iii) are correct

(i) and (iii) are correct

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

(i) and (ii) are correct

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Any of the above

Vertical tensile splitting

Buckling

Shear

TRUE ANSWER : ?
YOUR ANSWER : ?

The timber floor not spanning on the masonry wall but properly anchored to the wall gives

Neither lateral nor rotational restraint

Both lateral and rotational restraints

Rotational restraint but not lateral restraint

Lateral restraint but not rotational restraint

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:

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

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

TRUE ANSWER : ?
YOUR ANSWER : ?

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