Retaining Walls MCQ with answer and solution

Concept

Water tanks are analysed by Reissner's method, Carpenter's simplified method, the approximate method and the BIS (IS 3370) code method. Rankine's theory is for earth pressure.

Step-by-step solution

1. List the known methods for water tank walls: Reissner's method, Carpenter's simplified method, the approximate method and the IS code method (IS 3370). 2. Rankine's theory gives lateral earth pressure on retaining walls. 3. Rankine's method is not a water tank analysis method. 4. So the answer is A.

Explanation

Reissner's method and Carpenter's simplified method are used for tank walls with different base conditions. The BIS code method uses coefficient tables from IS 3370. Rankine's theory is used for earth pressure on retaining walls, not for tank design.

Why the other options are wrong

B: Reissner's method is used for circular tank walls. C: The BIS code method (IS 3370) is a standard method for tanks. D: Carpenter's simplified method is used for tank walls with a fixed or hinged base.

Shortcut

Rankine is linked with earth pressure, so it is the odd one out.

Common mistake

Choosing Rankine as a tank method because tank walls also take lateral pressure like retaining walls.