Question

Revised estimate is required due to
1. changes of quantity of materials, rates, etc.
2. addition of new work
3. deduction of existing work
4. changes of design

Answer 1

Correct Answer - Option 1 : changes of quantity of materials, rates, etc.

The different type of estimates and their meaning is mentioned below in tabulated form:

Type of Estimate	Definition
Preliminary Estimate	It is an approximate estimate and prepared by owner itself before the actual award of work to any agency.
Cube Rate Estimate	It is an approximate estimate and prepared by calculating the cubical content of building by multiplying its length, breadth and height.
Detailed Estimate	It is the accurate estimate prepared by working out quantities of each items of work. It is prepared in two stages: 1. Details of measurements and calculation of quantities and 2. Abstract of Estimate.
Revised Estimate	It is prepared when original sanctioned estimate is likely to exceed more than 5% due to changes in quantity of material or rates.
Supplementary Estimate	It is the fresh detailed estimate of the additional works in addition to the original estimate. It is required when further development is required during the progress of work.