The velocity of sound in bricks is ______

Proper shape of the hall can help in preventing the formation of echoes.

The recommended volume for a public lecture hall is _______

It is quite evident that the incoming air for ventilation should be ____ in summer and ____ in winter before it enters t…

__________________ is an index which combines the effect of air movement, humidity and temperature.

In __________ system, the partial vacuum is created inside of the room by exhausting the vitiated inside air by fans or …

The ____________ plays an important role in the comfort of persons affected by ventilation system.

For working a temperature of 21 degree Celsius, range of 30% to 70% of ________ is desirable.