Air Conditioning Systems Quiz

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

• To remove heat from the refrigerant gas

• To condition and distribute air within a building

• To compress gas and give off heat

• To draw room air across the heat exchanger

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

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

• Single split system operates in a similar way to refrigerators, while multi-split system is designed to condition individual rooms

• Single split system uses a dual duct system, while multi-split system uses a VRV/VRF system

• Single split system has a compressor and expansion valve located within the external unit, while multi-split system has them located within the internal unit

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

• VRF stands for Variable Room Flow, it uses a main refrigeration unit and has no drainage system for condensate removal

• VRF stands for Variable Refrigerant Flow, it uses a dual duct system and requires air ducts for distribution

• VRF stands for Variable Refrigerant Flow, it uses a three-pipe distribution system and incurs minimal energy loss compared with forced air systems

• VRF stands for Variable Room Flow, it uses a single outdoor condensing unit and requires a backup heat source

Briefly explain how the refrigeration process works.

• It uses a dual duct system to distribute gas via two ducts

• It compresses gas to give off heat and then expands it to have a cooling effect

• It operates in a similar way to refrigerators or freezers

• It takes fresh ambient air from inside the building, cleans it, heats or cools it, and then forces it through some ductwork outside.

State 3 types of ducted air conditioning systems

• Single split, Multi-split, VRV

• CAV, VAV, Induction

• Split system, Central plant, Dual duct

• VRV, VAV, Dual duct

What is air conditioning?

• A system that takes fresh ambient air from outside, cleans it, heats or cools it, and then forces it through some ductwork turning it into gas.

• A system that compresses gas to give off heat and then expands it to have a cooling effect

• A system that is capable of heating and cooling a building as well as controlling the humidity of the air

• A system that operates in a similar way to refrigerators or freezers

What is the main purpose of a compressor in a refrigeration process?

• To remove heat from the refrigerant gas

• To compress gas and give off heat

• To expand the refrigerant liquid to have a cooling effect

• To draw room air across the heat exchanger

What is the purpose of a dual duct system in air conditioning?

• To take fresh ambient air from outside, clean it, heat or cool it, and then force it through some ductwork around the building

• To compress gas to give off heat and then expand it to have a cooling effect

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

• To condition and distribute air within a building

What is the purpose of a split system air conditioner?

• To take fresh ambient air from outside, clean it, heat or cool it, and then force it through some ductwork around the building

• To condition and distribute air within a building

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

• To condition individual rooms as stand-alone units

What is the purpose of an expansion valve in a refrigeration process?

• To remove heat from the refrigerant gas

• To draw room air across the heat exchanger

• To control the flow of refrigerant and cause it to expand

• To compress gas and give off heat