Which of the following features in a house provides cross ventilation?

Appeared in: RIMS Nursing Officer - 2022

Explanation

Cross ventilation is a natural process that uses wind to create a pressure difference, pushing fresh air through a building.
Placing doors and windows on opposite walls provides a direct and unobstructed path for this airflow.
This continuous air exchange effectively removes heat, humidity, odors, and airborne contaminants like bacteria and viruses, improving indoor air quality.

Option A: This design physically blocks the possibility of creating openings on opposite sides of the house, which is a prerequisite for cross ventilation.
Option C: Air-conditioning is a mechanical system that primarily cools and recirculates indoor air. It does not create a natural flow of fresh outdoor air through the house.
Option D: High inlets are characteristic of 'stack ventilation,' where hot air rises and exits from the top. This is different from cross ventilation, which is the horizontal movement of air across a room driven by wind.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Principles of Natural Ventilation in Housing as background academic context rather than a clinical decision trigger.
As a community health nurse, advising families on improving home ventilation is a key health promotion activity to reduce the burden of infectious diseases.
Proper cross ventilation significantly reduces the concentration of airborne pathogens (e.g., bacteria causing Tuberculosis, viruses causing influenza or COVID-19), lowering the risk of transmission among household members.
This is especially critical in overcrowded or low-income housing where the risk of respiratory infections is higher.

How to Approach the Question

First, identify the core concept of the question, which is 'cross ventilation'.
Recall or deduce the definition of cross ventilation: the movement of air across a space, driven by wind, requiring an entry and exit point.
Systematically evaluate each option against this definition.
Option A (back-to-back houses) clearly blocks airflow.
Option C (air-conditioning) is a mechanical system that recirculates air, not a natural cross-flow.
Option D (high inlets) relates to vertical air movement (stack effect), not horizontal cross-flow.

Concept Tested & Keywords

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E6 Parks TextBook of Preventive & Social Medicine part 2 — Subpart B (pp 233-449 of 464) p. 56-58

Practise the full RIMS Nursing Officer - 2022

Attempt every question from this paper in a timed mock, then review the full solution for each one.