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

Related MCQs

• The systems installed in buildings to make them comfortable, functional, efficient and safeis called _________________
• The term __________ is used to indicate the science of controlling air with respect to humidity, temperature, movement of air, bacteria content, etc.
• The content of oxygen is normally ________% in air.
• Where people are working, there has to be ______________ to cause proper ventilation of the premises.
• It is quite evident that the incoming air for ventilation should be ________ in summer and ________ in winter before it enters the room.
• Why should people implement rainwater harvesting?