Design of Masonry Structures Mcqs

This set of Civil Engineering Multiple Choice Questions & Answers (MCQs) focuses on “ Design of Masonry Structures ”. These Mcqs are chosen from a collection of most authoritative and best reference books on Civil Engineering. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, University and College entrance exams, Jobs and interviews. One should practice our MCQS to assimilate Design of Masonry Structures comprehensively.

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1.
The use of relatively weak mortar_______________?

Consider the following statements.
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.
2. will result in reduction of stresses due to differential expansion of masonry units.
select the correct statements.

1 alone is correct

2 alone is correct

both 1 and 2 are correct

neither 1 nor 2 is correct

2.
A high lime content in a composite cement-lime mortar results in______________?

Consider the following statements.
1. slow hardening.
2. quick setting.
3. weaker mortar.

select the correct statements.

2 and 3 are correct

1 and 2 are correct

1 and 3 are correct

1, 2 and 3 are correct

3.
Direct load carrying capacity of a brick masonry wall standing freely as against when it supports RC slab will be___________________?

More

Less

The same in both the cases

100%

4.
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 are true and R is the correct explanation of A.

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

A is true but R is false.

A is false but R is true.

5.
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 _______________?

0.4 kg/cm2

0.7 kg/cm2

1.0 kg/cm2

1.2 kg/cm2

6.
The mortars used for masonry construction are classified based on strength in IS 2250 and IS 1905 according to their designations L1,L2, H1, H2, M, M2.

The correct sequence of increasing order of their strengths is?

LLLZ.HLHI.MLMJ

L2,L,M2>Mi,H2)H

M,M2, H,H2,Li,L2

L2,L,M,M2,H,H2

7.
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________________?

15

19

20

25

8.
The basic stress in masonry units having height to width ratio of 1.5 may be increased by a factor of_________________?

1.2

1.4

1.6

2.0

9.
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 buttresses at certain intervals

Providing a deeper foundation

Using a richer mortar

Using stronger bricks

10.
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 are true and R is the correct explanation of A.

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

A is true but R is false.

A is false but R is true

11.
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_______________?

0.15 MPa

0.125 MPa

0.1 MPa

0.075 MPa

12.
Consider the following statements regarding provision of chases in masonry_________________?

(i) No chase should be permitted in a half brick load-bearing wall,
(ii) Vertical chases should not be closer than 2 m in any stretch of a wall,
(iii) Chases should be provided near to bearings of beams and lintels.
Select the the statements ?

(i) and (ii) are correct

) Vertical chases should not be closer than 2 m in any stretch of a wall,

I) Chases should be provided near to bearings of beams and lintels.

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

13.
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
select the correct statements?

Only (ii) is correct

(i) and (ii) are correct

(ii) and (iii) are correct

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

14.
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 A. B. C. D. ?

90

95

00

05

15.
Consider the following statements regarding bands to be provided for strengthening masonry work in masonry buildings constructed in zone III, IV and V?

(i) Lintel band is provided at lintel level on partition walls,
(ii) Gable band is provided at top of gable masonry below the purlins,
(iii) The bands shall be to full width of the wall and not less than 7.5 cm in depth,
(iv) The bands shall be made of reinforced concrete only.

the correct statements are?

(i) and (ii)

(i) and (iii)

(ii) and (iv)

(ii) and (iii)

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