- Convection is the process of heat transfer by the movement of a fluid (liquid or gas). - In this case, warm, less dense air rises, creating an upward current. - Placing outlets (ventilators) at the top facilitates the exit of this rising warm air. - This outgoing warm air creates a slight pressure difference, drawing in cooler, fresh air from lower openings like doors and windows, maintaining air circulation.
Ventilators are provided at the top of the room
Asked in WBPSC CS Prelims 2019 · Topic: Heat and Thermodynamics (Modes of Heat Transfer (Conduction, Convection, Radiation))
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Answer: C. to maintain convectional currents to keep the air fresh in the room.
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