Methods of Estimation MCQ with answer and solution

Concept

Technical sanction is given by a competent engineering authority to a detailed estimate. Administrative approval is based on a preliminary or approximate estimate.

Step-by-step solution

1. A preliminary (approximate) estimate is used to get administrative approval. 2. After that, a detailed estimate is prepared with drawings, specifications and quantities. 3. The competent engineer checks it and gives technical sanction. 4. So technical sanction is given to the detailed estimate. Answer is (C).

Explanation

Technical sanction means the design and cost are checked and found correct by a competent engineering officer. This needs full quantities and rates, so it is given only to the detailed estimate. Preliminary or approximate estimates are used only for administrative approval.

Why the other options are wrong

A: A preliminary estimate is for administrative approval, not technical sanction. B: An abstract of cost is only a part of the detailed estimate, not the estimate that gets sanction. D: An approximate estimate is the same as a preliminary estimate and is used for administrative approval.

Shortcut

Administrative approval goes with the preliminary estimate. Technical sanction goes with the detailed estimate.

Common mistake

Mixing up administrative approval (preliminary estimate) with technical sanction (detailed estimate).