Removal of inside air and supply of fresh outside air in a closed room is known as _____

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

The adequate absorbing surfaces should be provided in the hall to control the ________

The branch of science which deals with origin and propagation of sound is called as _______

The difference of temperature between the outside air and inside air tends to the deposition of moisture in the room sur…

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

The location of _____ depends on various factors such as structural features, composition of openings, height of room, e…

__________________ are used to collect the valuable chemical or mineral dusts.