Design Of Masonry Structures MCQ Questions & Answers

31

Assertion A : From consideration of structural soundness and economy of design, most codes control the maximum slenderness ratio of masonry walls and columns.
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 is true and R is the correct explanation of A B) Both A and R is 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

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Answer & Solution

Answer: Option A

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32

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

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Answer & Solution

Answer: Option A

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33

Consider the following statements: The use of relatively weak mortar
(i) Will accommodate movements due to loads and cracking if any and will be distributed as thin hair cracks which are less noticeable or harmful.
(ii) Will result in reduction of stresses due to differential expansion of masonry units.

A) (i) alone is correct B) (ii) alone is correct C) Both (i) and (ii) are correct D) Neither (i) nor (ii) is correct

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Answer & Solution

Answer: Option C

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34

The effective height of free standing non-load bearing wall and column respectively will be

A) 1.0H and 1.0H B) 1.5H and 1.5H C) 2.0H and 1.5H D) 2.0H and 2.0H

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Answer & Solution

Answer: Option D

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35

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

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Answer & Solution

Answer: Option A

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36

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

A) 0.15 MPa B) 0.125 MPa C) 0.1 MPa D) 0.075 MPa

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Answer & Solution

Answer: Option A

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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%

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Answer & Solution

Answer: Option B

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38

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

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

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Answer & Solution

Answer: Option A

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39

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

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Answer & Solution

Answer: Option A

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40

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

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

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Answer & Solution

Answer: Option C

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Design Of Masonry Structures MCQ Questions & Answers | Civil Engineering