Limit State Method MCQ with answer and solution

Concept

Creep coefficient values in IS 456 (clause 6.2.5.1)

Step-by-step solution

1. IS 456:2000 gives creep coefficient by age at loading: 7 days = 2.2; 28 days = 1.6; 1 year = 1.1. 2. At 28 days the value is 1.6.

Explanation

The later the load is applied, the lower the creep. IS 456 lists 2.2 for loading at 7 days, 1.6 at 28 days and 1.1 at one year.

Why the other options are wrong

2.2 is for loading at 7 days and 1.1 is for loading at one year. 2.8 is not given in the code.

Shortcut

7 d → 2.2, 28 d → 1.6, 1 yr → 1.1.

Common mistake

Taking the 7-day value.