# DESIGN of MASONRY STRUCTURES Interview Questions

Posted On:February 1, 2019, Posted By: Latest Interview Questions, Views: 1305, Rating :

## DESIGN of MASONRY STRUCTURES Interview Questions and Answers

Dear Readers, Welcome to DESIGN of MASONRY STRUCTURES Interview Questions and Answers have been designed specially to get you acquainted with the nature of questions you may encounter during your Job interview for the subject of DESIGN of MASONRY STRUCTURES in Civil Engineering. These DESIGN of MASONRY STRUCTURES Questions are very important for campus placement test and job interviews. As per my experience good interviewers hardly plan to ask any particular questions during your Job interview and these model questions are asked in the online technical test and interview of many IT & Non IT companies.

### 1. If the ratio of center to center spacing of intersecting walls to actual thickness of intersecting wall is more than 20, then the stiffening coefficient for wall proper will be

a) 0

b) between 0 and 1

c) 1

d) greater than 1

Ans: d

### 2. 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 Of these statements

a) (i) and (ii) are correct

b) (ii) and (iii) are correct

c) (i) and (iii) are correct

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

Ans: a

### 3. 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

a) 4 percent

b) 5 percent

c) 6 percent

d) 7 percent

of the total vertical load on the most heavily loaded wall or column in the group.

Ans: d

### 4. The effective height of free standing nonload bearing wall and column respectively will be

a) 1.OH and 1.OH

b) 1.5Handl.5H

c) 2.0Handl.5H

d) 2.0H and 2.0H

where H is the height of wall or column between centers of supports.

Ans: d

a) 0.75 H

b) 0.85 H

c) 1.0 H

d) 1.5 H

Ans: a

a) 5 cm

b) 7.5 cm

c) 10 cm

d) 15 cm

Ans: b

a) 0 6

b) 0.75

c) 0.85

d) 0.95

Ans: c

a) 0.64 m

b) 0.96 m

c) 1.28 m

d) 1.5 m

Ans:a

### 9. The bending stress in a wall or column subjected to effective vertical load need not be considered, if the eccentricity ratio is

a) less than or equal to 1/24

b) less than or equal to 1/6

c) more than 1/24

d) less than or equal to 1/12

Ans:a

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

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

c) A is true but R is false.

d) A is false but R is true.

Ans:a

a) 10%

b) 25%

c) 33 1/3%

d) 50%

Ans:b

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

a) Zone I only

b) Zone I and II

c) Zone I, II and III

d) Zone I, II, III and IV

Ans:b

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

a) shear

b) vertical tensile splitting

c) buckling

d) any of the above

Ans:a

### Reason R : By controlling the maximum slenderness ratio, failure is by excessive stress and not by buckling. Select your answer according to codes given below:

a) Both A and R are true and R is the correct explanation of A.

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

c) A is true but R is false.

d) A is false but R is true.

Ans:a

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

a) lateral restraint but not rotational restraint

b) rotational restraint but not lateral restraint

c) both lateral and rotational restraints

d) neither lateral nor rotational restraint

Ans:a

### (iii) RCC slab with a minimum bearing of 10 cm on the wall Of these statements

a) (i) and (iii) are correct

b) (i) and (ii) are correct

c) (ii) and (iii) are correct

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

Ans:d

a) 10 cm

b) 15 cm

c) 20 cm

d) 30 cm

Ans:a

a) 1 : % : 3

b) 1 : Vz: 4>/2

c) 1:1:6

d) 1:2:9

Ans:d

### Reason R : Lime based mortars have lower bond strength as compared to non-lime mortars.

a) Both A and R are true and R is the correct explanation of A.

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

c) A is true but R is false.

d) A is false but R is true.

Ans:c

a) 5 to 8 cm

b) 9 to 13 cm

c) 14 to 18 cm

d) 19 to 23 cm

Ans:b

a) 50%

b) 60%

c) 70%

d) 80%

Ans:c

a) 3

b) 5

c) 7.5

d) 10

Ans:d

### 23. Rich cement mortars are more liable to cracking as compared to lean mortars because rich mortars have

a) high shrinkage

b) less strength

c) both (a) and (b)

d) none of above

Ans:a

### (iii) they are prone to segregation Of these statements

a) Only (ii) is correct

b) (i) and (ii) are correct

c) (ii) and (iii) are correct

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

Ans:b

### 25. For earthquake resistant masonry buildings, the vertical distance between openings one above the other in a load bearing wall shall not be less than

a) 50 cm

b) 60 cm

c) 75 cm

d) 100 cm

Ans:b

Design of Masonry Structures Interview Questions

### 26. For earthquake resistant masonry buildings, where seismic coefficient is less than 0.08, the horizontal distance between two openings shall not be less than

a) Vt x height of shorter opening

b) Vt x height of longer opening

c) Ax height of shorter opening

d) Vi x height of longer opening

Ans:a

### 27. 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. Of these statements, the correct statements are

a) (i) and (ii)

b) (i) and (iii)

c) (ii) and (iv)

d) (ii) and (iii)

Ans:d

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

a) sum of thickness of both leaves

b) two-third of the sum of thickness of both the leaves

c) actual thickness of the stronger leaf

d) larger of (b) and (c)

Ans:d

### 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) Both A and R are true and R is the correct explanation of A.

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

c) A is true but R is false.

d) A is false but R is true.

Ans:a

### 30. 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. Of these statements

a) (i) and (ii) are correct

b) (i) and (iii) are correct

c) (ii) and (iii) are correct

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

Ans:a

31. Consider the following statements :

The use of relatively weak mortar

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.

Of these statements

a) 1 alone is correct

b) 2 alone is correct

c) both 1 and 2 are correct

d) neither 1 nor 2 is correct

Ans:c

a) 0.4 kg/cm2

b) 0.7 kg/cm2

c) 1.0 kg/cm2

d) 1.2 kg/cm2

Ans:c

### 33. 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?

a) providing buttresses at certain intervals

b) providing a deeper foundation

c) using a richer mortar

d) using stronger bricks

Ans:a

### Of these statements:

a) 2, 3 and 4 are correct

b) 1,2 and 3 are correct

c) 1,3 and 4 are correct

d) 1,2 and 4 are correct

Ans:

### 3. weaker mortar. Of these statements

a) 2 and 3 are correct

b) 1 and 2 are correct

c) 1 and 3 are correct

d) 1, 2 and 3 are correct

Ans:c

### 36. 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

a) LLLZ.HLHI.MLMJ

b) L2,L,,M2>Mi,H2)H,

c) M,,M2, H,,H2,Li,L2

d) L2,L,,M,,M2,H,,H2

Ans: b

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

a) more

b) less

c) the same in both the cases

d) 100%

Ans:b

a) 15

b) 19

c) 20

d) 25

Ans:a

a) b) c) d)

0.090

0.095

0.100

0.105

Ans:c

a) 1.2

b) 1.4

c) 1.6

d) 2.0

Ans:c

### Reason R : Composite cement-lime mortar has higher drying shrinkage than cement mortar.

a) Both A and R are true and R is the correct explanation of A.

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

c) A is true but R is false.

d) A is false but R is true.

Ans:c

### 42. 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?

a) 1,2 and 3

b) 1 and 2

c) 2 and 3

d) 1 and 3

Ans:d

a) 0.15 MPa

b) 0.125 MPa

c) 0.1 MPa

d) 0.075 MPa

Ans:a