search
arrow-left Previous
Next arrow-right
Q: Which one of the following is NOT a general rule of natural ventilation?
  • A. Equal areas of opening may be provided in all sides
  • B. Greatest flow can be achieved by keeping more outlet area compared to inlet area
  • C. Outlet openings should be located on the leeward side near the top
  • D. Inlet openings should not be obstructed by any other structures or trees or sign boards in the path of air flow
Correct Answer: Option B - As per IS 3362-1977 clause 6.3, greatest flow per unit area of opening is obtained by using inlet and outlet opening of nearly equal areas at the same level. • Inlet openings should not as far as possible be obstructed by adjoining buildings, trees, sign boards or other obstructions or by partitions inside in the path of air flow. • Inlet and outlet opening at high levels may only clear the top air at that level without producing air movement at the level of occupancy
B. As per IS 3362-1977 clause 6.3, greatest flow per unit area of opening is obtained by using inlet and outlet opening of nearly equal areas at the same level. • Inlet openings should not as far as possible be obstructed by adjoining buildings, trees, sign boards or other obstructions or by partitions inside in the path of air flow. • Inlet and outlet opening at high levels may only clear the top air at that level without producing air movement at the level of occupancy

Explanations:

As per IS 3362-1977 clause 6.3, greatest flow per unit area of opening is obtained by using inlet and outlet opening of nearly equal areas at the same level. • Inlet openings should not as far as possible be obstructed by adjoining buildings, trees, sign boards or other obstructions or by partitions inside in the path of air flow. • Inlet and outlet opening at high levels may only clear the top air at that level without producing air movement at the level of occupancy