Building Materials - Study Mode

[#191] The most fire resistant paints are:
Correct Answer

(C) Asbestos paints

[#192] Assertion A : Pure lime takes a long time to develop adequate strength. Reason R : Pure lime has slow hardening characteristics. Select your answer according to the coding system given below:
Correct Answer

(A) Both A and R is true and R is correct explanation of A

[#193] Assertion A : Normally turpentine oil is recommended as thinner for indoor painting. Reason R : Turpentine oil is costlier than other thinners. Select your answer according to the coding system given below:
Correct Answer

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

[#194] Assertion A : Paints with white lead base are not recommended for painting of iron works. Reason R : Paints with white lead base do not check rusting of iron. Select your answer according to the coding system given below:
Correct Answer

(A) Both A and R is true and, R is the correct explanation of A

[#195] The slenderness ratio for masonry walls should not be more than
Correct Answer

(B) 20

Explanation

Solution: Definition: The slenderness ratio of a masonry wall is the ratio of its effective height or effective length (whichever is less) to its thickness. Purpose: This ratio indicates the wall’s susceptibility to buckling under compressive loads. A higher value means the wall is taller and thinner, making it less stable. Code requirement: As per standard building codes such as IS 1905:1987, the slenderness ratio for masonry walls should not exceed 20 to ensure stability and safety. Reason: Limiting the slenderness ratio reduces the risk of lateral deflection, buckling, and failure under axial loads. Conclusion: For structural safety, the effective height or length of a masonry wall divided by its thickness should be ≤ 20 .