A cooling tower with a fan is called:

A cooling tower with a fan is called:

• A. Mechanical draft
• B. Natural draft
• C. Forced draft
• D. Hybrid draft

Answer: (A)

Air movement produced by an external device that uses power is mechanical draft. A cooling tower with a fan fits this because the fan provides the energy to move air through the tower, rather than relying on natural buoyancy. In natural draft towers, air flows due to density differences without any fan. Within mechanical draft, you may have forced draft (air pushed into the tower by a fan) or induced draft (air pulled through by a fan at the top), and some designs combine both. The key idea is that the presence of a fan means the system uses mechanical draft.

Air movement produced by an external device that uses power is mechanical draft. A cooling tower with a fan fits this because the fan provides the energy to move air through the tower, rather than relying on natural buoyancy. In natural draft towers, air flows due to density differences without any fan. Within mechanical draft, you may have forced draft (air pushed into the tower by a fan) or induced draft (air pulled through by a fan at the top), and some designs combine both. The key idea is that the presence of a fan means the system uses mechanical draft.