Methods of Estimation MCQ with answer and solution

Concept

A detailed estimate is made from item-wise quantities and rates. A revised estimate is one type of detailed estimate.

Step-by-step solution

1. Estimates are of two kinds: approximate (preliminary) and detailed. 2. Approximate methods include the plinth area method, cubical content method and service unit method. 3. Detailed estimate types include the revised estimate, supplementary estimate, annual repair estimate and special repair estimate. 4. So the revised estimate is a detailed estimate.

Explanation

A revised estimate is a detailed estimate. It is prepared when the original sanctioned estimate is exceeded by more than about 5% or when the work changes a lot. The other three options are quick, approximate methods.

Why the other options are wrong

A: The service unit method is approximate (cost per bed, per student, etc.). B: The cubical content method is approximate (cost per m³ of building volume). C: The plinth area rate method is approximate (cost per m² of plinth area).

Shortcut

Words like 'rate', 'unit', 'plinth' or 'cubical' mean approximate. 'Revised' or 'supplementary' mean detailed.

Common mistake

Students think the plinth area method is detailed because it is used often. It is only approximate.