What is the difference between a single split AC system and a multi-split system?

• Single split uses a compressor, while multi-split uses a condenser

• Single split operates in a similar way to refrigerators, while multi-split operates in a similar way to freezers

• Single split is for a single room, while multi-split is for multiple rooms

• Single split has an internal and external unit, while multi-split only has an internal unit

What is the purpose of an Air handling unit (AHU)?

• To remove heat from the refrigerant gas

• To draw room air across the heat exchanger

• To compress gas and give off heat

• To condition and distribute air within a building

State 3 types of ducted air conditioning system.

• VRV, VAV, Dual duct

• Split system, Central plant, Dual duct

• CAV, VAV, split system

• Single split, Multi-split, VRV

Briefly explain how a simple air conditioning system works.

• It takes fresh ambient air, cleans it, heats or cools it, and forces it through a wind tunnel around a building

• It conditions individual rooms as stand-alone units using an internal and external unit

• It uses a compressor, condenser, expansion valve, and evaporator in a refrigeration process

• It compresses water to give off heat, then expands gas to have a cooling effect

What does VRF stand for and how does it work? How is it different to ducted systems?

• Variable Refrigerant Flow, it connects to one or more air handlers and incurs minimal energy loss compared with forced air systems

• Variable Refrigerant Volume, it uses a three-pipe distribution system and requires a backup heat source, unlike ducted systems

• Variable Refrigerant Fluid, it uses a main refrigeration unit to feed a single storey of a building, and it saves space by not using air ducts

• Variable Refrigerant Volume, it has a drainage system to remove condensate when cooling and requires ductwork, unlike ducted systems

What is the function of a condenser in an air conditioning system?

• To compress the refrigerant gas

• To distribute conditioned air within a building

• To remove heat from the refrigerant gas

• To draw room air across the heat exchanger

What is the role of an expansion valve in an air conditioning system?

• To compress the refrigerant gas

• To remove heat from the refrigerant gas

• To distribute conditioned air within a building

• To reduce the pressure of the refrigerant gas

What is the difference between a VRV and a VAV air conditioning system?

• VRV is a type of ducted system, while VAV is a type of split system

• VRV stands for Variable Refrigerant Volume, while VAV stands for Variable Air Volume

• VRV uses a three-pipe distribution system, while VAV uses a two-pipe system

• VRV is for multiple rooms, while VAV is for a single room

What is the function of a compressor in an air conditioning system?

• To distribute conditioned air within a building

• To remove heat from the refrigerant gas

• To compress the refrigerant gas

• To draw room air across the heat exchanger

What is the difference between a CAV and a VAV air conditioning system?

• CAV stands for Constant Air Volume, while VAV stands for Variable Air Volume

• CAV is a type of split system, while VAV is a type of ducted system

• CAV uses a two-pipe distribution system, while VAV uses a three-pipe system

• CAV is for a single room, while VAV is for multiple rooms