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Q: Where people are working, there has to be ........... to cause proper ventilation of the premises.
  • A. Air change
  • B. Humidity
  • C. Temperature
  • D. Moisture
Correct Answer: Option A - Where people are working, there has to be air change to cause proper ventilation of the premises. The minimum and maximum rates of air change per hour is 1 and 60 respectively. If the rate of change is less than 1/hour, it will not create any appreciable effect of the ventilation system. On the other hand is the rate of air change is more than 60/hour, it will result in discomfort due to high velocities of air.
A. Where people are working, there has to be air change to cause proper ventilation of the premises. The minimum and maximum rates of air change per hour is 1 and 60 respectively. If the rate of change is less than 1/hour, it will not create any appreciable effect of the ventilation system. On the other hand is the rate of air change is more than 60/hour, it will result in discomfort due to high velocities of air.

Explanations:

Where people are working, there has to be air change to cause proper ventilation of the premises. The minimum and maximum rates of air change per hour is 1 and 60 respectively. If the rate of change is less than 1/hour, it will not create any appreciable effect of the ventilation system. On the other hand is the rate of air change is more than 60/hour, it will result in discomfort due to high velocities of air.