Which term means a machine that cools a room, building, or vehicle?

Which term means a machine that cools a room, building, or vehicle?

• A. Air conditioner
• B. Device
• C. Fertiliser
• D. Detergent

Answer: (A)

The idea here is naming a specific machine that lowers the temperature of air in spaces. An air conditioner is a device designed to remove heat from indoor air and often reduce humidity, using a refrigeration cycle with parts like a compressor, condenser, evaporator, and expansion device. This setup is specifically built to cool rooms, entire buildings, or vehicles. The other options are too generic or unrelated: a device can be any tool, while fertiliser and detergent serve agricultural and cleaning purposes, not cooling. Because it names a particular cooling system, air conditioner is the best fit.

The idea here is naming a specific machine that lowers the temperature of air in spaces. An air conditioner is a device designed to remove heat from indoor air and often reduce humidity, using a refrigeration cycle with parts like a compressor, condenser, evaporator, and expansion device. This setup is specifically built to cool rooms, entire buildings, or vehicles. The other options are too generic or unrelated: a device can be any tool, while fertiliser and detergent serve agricultural and cleaning purposes, not cooling. Because it names a particular cooling system, air conditioner is the best fit.