Question

Directions: The following items consists of two statements; one labelled as 'Assertion (A)' and the other as 'Reason (R}'. You are to examine these two statements carefully and select the answers to these·, items using the codes given below:

Codes:
(a) both A and R are true and R is the correct explanation of A
(b) both A and Rare true but R is not a correct explanatio·n of A
(c) A is true but R is false
(d) A is faise but R is true

Assertion (A) : The concept of locating the neutral axis in a reinforced concrete flexural member as centroidal axis is applicable in working stress design method, but not in limit state design method.

Reason (R) : The working stress design method assumes that the structural material behaves in a nonlinear elastic manner and there is strain compatibility in bond between steel and concrete

• A. both A and R are true and R is the correct explanation of A
• B. both A and Rare true but R is not a correct explanatio·n of A
• C. A is true but R is false
• D. A is true but R is true

Answer 1

The correct option is C A is true but R is false

c) The working stress method assumes that concrete is elastic and the stress in concrete varies linearly from zero at the neutral axis to a maximum at the extreme fibre. The bond between steel and concrete is perfect within the elastic limit of steel.