Limit State Method MCQ with answer and solution

Concept

Basis of limit state design method

Formula

NONE

Step-by-step solution

1. Limit State Method ensures structural safety at ultimate load conditions and serviceability at working load conditions. 2. It accounts for safety against collapse using ultimate loads and serviceability under working load conditions such as deflection and cracking. 3. Thus, it involves calculations at both working loads and ultimate loads. Answer: C

Explanation

Limit State Method ensures both safety and usability by evaluating structural performance under working load and ultimate load conditions. It checks serviceability limit states at working loads to prevent excessive deflection or cracking while checking ultimate limit states at factored ultimate loads to prevent collapse. Therefore, option C is correct as it accounts for calculations at both working loads and ultimate loads.

Why the other options are wrong

A) Calculations on service load conditions alone form the basis of the Working Stress Method. B) Calculations on ultimate load conditions alone are used in the Ultimate Load Method. D) Limit State Method evaluates structural response under both working and ultimate load conditions across various load combinations.

Shortcut

Limit State = Checks both Ultimate safety and Serviceability working limits.

Common mistake

Assuming the Limit State Method accounts only for ultimate collapse conditions rather than both working and ultimate loads.