Heat

What percentage of total energy consumption in a typical commercial building is due to ACMV systems?

• 0.4
• 0.5
• 0.6
• 0.7

Which law explains that heat always transfers from higher to lower temperatures?

• First Law of Thermodynamics
• Second Law of Thermodynamics
• Law of Conservation of Energy
• Law of Entropy

What is the role of the compressor in an air-conditioning system?

• Cools the air
• Increases refrigerant pressure
• Condenses refrigerant
• Distributes air

What component absorbs heat from the room in an ACMV system?

• Compressor
• Condenser
• Evaporator
• Cooling tower

What does the cooling coil in an air conditioning system do?

• Heats the air
• Filters the air
• Condenses the refrigerant
• Absorbs heat and changes refrigerant to gas

The condenser in an ACMV system functions to:

• Circulate air
• Compress refrigerant
• Remove heat and condense refrigerant
• Produce chilled water

What device reduces the pressure of the refrigerant before it enters the evaporator?

• Compressor
• Evaporator
• Thermostatic Expansion Valve (TEV)
• Condenser

Which fluid is responsible for heat absorption and cooling in a refrigeration system?

• Water
• Coolant
• Refrigerant
• Steam

What is the purpose of the Air Handling Unit (AHU)?

• Store refrigerant
• Circulate chilled water
• Filter and condition air
• Control humidity only

What is the typical supply air temperature after cooling in the AHU?

• 12°C
• 15°C
• 20°C
• 27°C