For comfortable working, the _______ content should be limited to about 0.6% by volume.

The ________ of suitable type may be used to distribute air inside the room.

The range of audible sound too painful noise varies from ____ decibel.

The value of __________ depends on type of activity, geographical conditions, age of occupants, etc.

The word Acoustic is originally derived from a Greek word meaning _____

In Winter, the outside air is cool and hence, the process of air conditioning involves filtering, preheating and _______…

Combination system consist of supply system and ______ system.

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