|Note:- You can add tough questions into your favourite list for second revision.|
|Q1.||Free air is the air at|
|A.||atmospheric conditions at any specific location
||B.||20°C and 1 kg/cm2 and relative humidity of 36%
|C.||0°C and standard atmospheric conditions
||D.||15°C and 1 kg/cm2
||E.||25°C, 1 kg/cm2'and relative humidity of 50%.