What should always be used when working with high-voltage HVAC equipment?

• Insulated gloves

• Cotton work gloves

• Bare hands for better control

• Regular leather gloves

Which gas, commonly associated with HVAC leaks, is dangerous due to its odorless and colorless nature?

• Nitrogen

• Carbon monoxide

• Oxygen

• Helium

What should an HVAC technician do before starting maintenance on an electrical system?

• Keep the power on to test components

• Shut off power at the breaker and lock/tag it out

• Wear a face mask for dust protection

• Ground themselves using metal surfaces

Why must refrigerants be handled carefully?

• They are highly flammable in all cases

• They can cause burns and environmental damage

• They are harmless to humans but damage equipment

• They produce excess heat during storage

What PPE is most essential when working with refrigerants?

• Sunglasses and a dust mask

• Rubber boots and an apron

• Safety goggles and gloves

• Hard hat and earplugs

What is the main function of a compressor in an HVAC system?

• Absorbs moisture from the air

• Pumps refrigerant and pressurizes it

• Filters air for dust and debris

• Reduces humidity in ductwork

The "evaporator coil" is responsible for:

• Condensing refrigerant vapor

• Removing heat from indoor air

• Compressing refrigerant gas

• Filtering air for contaminants

What does the "condenser coil" do in an air conditioning system?

• Increases refrigerant temperature

• Releases heat from the refrigerant outdoors

• Prevents water leaks in ductwork

• Circulates air throughout a building

What component helps regulate refrigerant flow and pressure in an HVAC system?

• Thermostat

• Expansion valve

• Air filter

• Blower motor

What HVAC part is directly responsible for controlling indoor temperature?

• Compressor

• Condenser coil

• Thermostat

• Expansion valve