Principles of Building Planning MCQ with answer and solution

Concept

Required air changes per hour for ventilation

Formula

NONE

Step-by-step solution

1. Ventilation standards prescribe minimum air changes per hour to maintain indoor air quality and remove stale air. 2. For habitable rooms such as drawing rooms and bedrooms, 3 air changes per hour are recommended for adequate ventilation. 3. Thus, the minimum required air changes per hour for these rooms is 3. Answer: B

Explanation

Adequate ventilation in living spaces like drawing rooms and bedrooms requires replacing indoor air frequently enough to prevent stagnation and remove pollutants. Building codes recommend a minimum rate of 3 air changes per hour for these habitable rooms to maintain occupant comfort and healthy air quality. Thus, 3 air changes per hour is the standard minimum required.

Why the other options are wrong

A) 1 air change per hour is insufficient to maintain fresh air circulation in residential living areas. C) 6 air changes per hour is required for higher-occupancy spaces such as kitchens and assembly halls. D) 10 air changes per hour is intended for heavily used public or industrial environments like laboratories and workshops.

Shortcut

Living rooms and bedrooms require a minimum of 3 air changes per hour for proper ventilation.

Common mistake

Selecting 6 or 10 air changes per hour, which are required for kitchens or bathrooms rather than bedrooms.