12.1 Air Conditioning Systems Class Presentation

Multiple Choice

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

• To heat and cool a building

• To provide lighting

• To enhance sound quality

• To improve internet speed

Multiple Choice

What additional function does air conditioning perform besides heating and cooling?

• Controls the humidity of the air

• Increases air pressure

• Filters out dust

• Adds fragrance to the air

Multiple Choice

Why is air conditioning provided in buildings?

• To maintain an environment conducive to health and wellbeing

• To increase the building's value

• To reduce electricity consumption

• To enhance architectural design

Multiple Choice

What does air conditioning remove from the air?

• CO2 and odours

• Dust and pollen

• Moisture and heat

• Light and sound

Multiple Choice

What is the function of the evaporator coil in an air conditioner?

• Releases heat to the outside

• Absorbs heat from the indoor air

• Circulates refrigerant

• Converts refrigerant to liquid

Multiple Choice

Which component of an air conditioner releases absorbed heat outside?

• Evaporator Coil

• Compressor

• Condenser Coil

• Expansion Valve

Multiple Choice

What role does the compressor play in an air conditioning system?

• Absorbs heat from indoor air

• Releases heat outside

• Circulates refrigerant between the evaporator and condenser

• Converts refrigerant to liquid

Multiple Choice

What happens to the refrigerant inside the evaporator coil?

• It releases heat to the outside

• It evaporates, absorbing heat from the indoor air

• It circulates between the evaporator and condenser

• It converts to a liquid state

Multiple Choice

Where does the heated refrigerant gas release its heat in an air conditioning system?

• Inside the evaporator coil

• In the compressor

• In the condenser

• In the expansion valve

Multiple Choice

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

• To cool the air to 7°C

• To heat the air to 7°C

• To mix fresh air with room air

• To remove moisture from the air

Multiple Choice

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

• 10%

• 25%

• 50%

• 75%

Multiple Choice

What is the function of the supply fan in the central plant components?

• To cool the air

• To remove moisture

• To create positive air pressure

• To heat the air

Multiple Choice

How is air cooled in the cooling coil?

• Using heated water

• Using chilled water or refrigerant gas

• By mixing with fresh air

• By increasing air pressure

Multiple Choice

What is the purpose of the reheater battery?

• To cool the air to 7°C

• To mix fresh air with room air

• To heat the air to 34°C

• To remove moisture from the air

Multiple Choice

What does CAV stand for in HVAC systems?

• Constant Air Volume

• Controlled Air Ventilation

• Continuous Air Velocity

• Central Air Vent

Multiple Choice

What is the main advantage of a VAV system?

• It provides constant air temperature.

• It can meet the comfort requirements of different zones.

• It uses less energy than CAV systems.

• It requires no maintenance.

Multiple Choice

In a VAV system, what does the air handling unit (AHU) do?

• Heats the air

• Cools the air

• Dumps dirty air or recycles clean air

• Filters the air

Multiple Choice

How does a CAV system supply air?

• At a constant temperature

• At varying temperatures

• At a constant humidity

• At varying humidity

Multiple Choice

What does VAV stand for in HVAC systems?

• Variable Air Volume

• Ventilated Air Velocity

• Variable Air Ventilation

• Ventilated Air Volume

Multiple Choice

What is the typical constant air temperature maintained by VAV systems?

• 10°C

• 13°C

• 15°C

• 20°C

Multiple Choice

What component in a VAV terminal is used to regulate the system?

• Thermostat

• Actuator and damper

• Induction motor

• Diffuser

Multiple Choice

What is the purpose of a reheater in a VAV system?

• To cool the air

• To boost the temperature

• To filter the air

• To humidify the air

Multiple Choice

What do pressure sensors in a VAV system link to?

• Thermostats

• Variable speed drives

• Diffusers

• Reheaters

Multiple Choice

What is the role of the induction motor blower fans in a VAV system?

• To regulate air temperature

• To regulate air speed

• To regulate air pressure

• To regulate air humidity

Multiple Choice

What is the purpose of a dual duct system?

• To distribute air via two ducts for chilled and heated air

• To filter air for better quality

• To humidify air for comfort

• To cool air for refrigeration

Multiple Choice

How is incoming fresh air treated in a dual duct system?

• It is directly released into the room

• It is preconditioned before entering the fan suction chamber

• It is heated to a high temperature

• It is cooled to a low temperature

Multiple Choice

What is the function of the insulation in a dual duct system?

• To increase the speed of air flow

• To prevent chilled air from absorbing warmer ambient temperatures

• To reduce noise from the ducts

• To enhance the appearance of the ducts

Multiple Choice

What happens to the air after it is split into hot and cold in a dual duct system?

• It is mixed back together

• It is released outside

• It is distributed through separate ducts

• It is used for refrigeration

Multiple Choice

What does a single outdoor condensing unit connect to in a VRV system?

• Thermostats

• Air handlers

• Refrigerant lines

• Backup heat sources

Multiple Choice

What is cycled through the outdoor unit in a VRV system?

• Water

• Glycol

• Refrigerant

• Air

Multiple Choice

How does a VRV system compare to forced air systems in terms of energy loss?

• More energy loss

• Minimal energy loss

• Equal energy loss

• No energy loss

Multiple Choice

What is not required in a VRV system that is often needed in other systems?

• Back Up Air handlers

• Back Up Refrigerant Units

• Backup heat source

• Thermostats

Multiple Choice

What is the function of the internal unit in a split system air conditioner?

• It acts as the condenser.

• It draws outside air across the heat exchanger.

• It evaporates the refrigerant liquid.

• It compresses the refrigerant gas.

Multiple Choice

What component is located in the external unit of a split system air conditioner?

• Evaporator

• Compressor

• Centrifugal impeller

• Copper tubing

Multiple Choice

How are the two units of a split system air conditioner connected?

• With stainless steel tubing

• With copper tubing

• With aluminum tubing

• With low carbon steel tubing

Multiple Choice

What does the heat exchanger in the external unit use to draw outside air?

• Centrifugal impeller

• Propeller fan

• Compressor

• Expansion valve

Multiple Choice

What is the primary purpose of a split system air conditioner?

• To heat individual rooms

• To condition individual rooms

• To freeze individual rooms

• To ventilate individual rooms