Pre knowledge assessment Air Conditioning Systems in Buildings

What is the primary function of air conditioning (AC) in buildings?

• To provide lighting

• To control the temperature and humidity of the air

• To supply water

• To enhance the building's structural integrity

Why is air conditioning provided in buildings?

• To increase the building's height

• To maintain an environment conducive to the health and wellbeing of the inhabitants

• To reduce the building's weight

• To improve the building's aesthetics

What does air conditioning (AC) do to the air in buildings?

• Increases CO2 levels

• Supplies adequate oxygen, maintains a comfortable temperature, and removes CO2 and odours

• Adds odours to the air

• Reduces oxygen levels

What is the role of the recirculation duct in central plant AC systems?

• To bring in fresh air from outside

• To exhaust air out of the building

• To recirculate air within the system

• To cool the air before distribution

What is the purpose of the preheater battery in the winter cycle?

• To cool the air

• To mix room air with fresh air

• To heat fresh air to 7ºC

• To dehumidify the air

What percentage of room air can be mixed with fresh air using the recirculation duct?

• 10%

• 25%

• 50%

• 75%

What is the 'duty' of a supply fan?

• The air volume and static pressure at which it operates

• The temperature of the air it supplies

• The humidity level it maintains

• The speed at which it rotates

How is air cooled in the cooling coil?

• By heating it to 34ºC

• By mixing it with fresh air

• Using chilled water or a refrigerant gas

• By increasing the air pressure

What is the purpose of the reheater battery?

• To cool the air

• To heat the air to 34ºC

• To mix room air with fresh air

• To dehumidify the air

What does CAV stand for in the context of air systems?

• Constant Air Volume

• Controlled Air Ventilation

• Continuous Air Vent

• Central Air Valve