Question

 In building work, the cost for internal electrification, sanitary and water supply works is around.
1. 10% of estimated cost of building
2. 15% of estimated cost of building.
3. 20% of estimated cost of building.
4. 25% of estimated cost of building.

Answer 1

Correct Answer - Option 3 : 20% of estimated cost of building.

Explanation:

• While preparing an estimate, it is not possible to work out in detail in case of petty items. Items are other than civil engineering items are called lumpsum items.
• The following are some of the lumpsum items in the estimate.

Work	Percentage of estimate
Water supply and sanitary arrangements	8
Electrical installation	8
Contingencies and unforeseen items	3 - 5
Work charge establishments	1.5 - 2

 

So, the Total percent estimate of internal electrification, sanitary, and water supply works is 8 + 8 = 16 % 

Including Continegencies and unforssen items it would be 16 + 4 = 20 %

• Even if sub estimates prepared or at the end of execution of work, the actual cost should not exceed the lump sum amount provided in the main estimate.