Download Aptitude Crack
img not found img not found

Building Materials - Engineering

Q1:

The lime which contains mainly calcium oxide and slacks with water, is

A 63" fat lime

B quick lime

C hydraulic lime

D poor lime

E none of these.

ANS:B - quick lime

Quicklime is correct.

Types of quicklime (CaO+impurities in the form of clay etc)-

1. Rich lime/fat lime/white lime- The quicklime in which 95% to 100% pure lime (CaO), 0-5% impurity.
2. Hydraulic lime- The quicklime in which 70 to 95% pure lime (CaO), 5-30% impurity.
3. Poor lime/Lean lime- the quicklime in which up to 70% (CaO), more than 30% impurity.