A. 0
B. between 0 and 1
C. 1
D. greater than 1
Design of Masonry Structures
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 _______________?
A. 0.4 kg/cm2
B. 0.7 kg/cm2
C. 1.0 kg/cm2
D. 1.2 kg/cm2
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 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.
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
select the correct statment.
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
If H is the height of wall between centers of supports, then the effective height of wall where concrete floors have a bearing on wall irrespective of the direction of span will be________________?
A. 0.75 H
B. 0.85 H
C. 1.0 H
D. 1.5 H
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
the correct statments is ?
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
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
If the eccentricity ratio is more than 1/24, then increase in the permissible stress in the design of wall subjected to eccentric loading as per code is_________________?
A. 10%
B. 25%
C. 33 1/3%
D. 50%
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
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 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.
