HVAC Skills and Knowledge

Front

Which of the following is a primary function of a pressure-enthalpy diagram in refrigeration?

Back

b) Analyze refrigerant properties

Front

What safety procedure should always be followed when working with refrigerants?

Back

b) Wear personal protective equipment (PPE)

Front

What is the primary purpose of a vacuum pump in an HVAC system?

Back

b) Remove moisture and non-condensables

Front

What is the function of a thermostatic expansion valve (TXV)?

Back

c) Regulate refrigerant flow based on superheat

Front

A liquid receiver is typically installed:

Back

c) Between the compressor and condenser

Front

What is the primary role of a hot gas bypass valve?

Back

b) Maintain minimum load on the evaporator

Front

What is the primary function of a heat exchanger in a furnace?

Back

a) Transfer heat from combustion gases to air

Front

What type of refrigerant is most commonly used in modern residential air conditioning systems?

Back

d) R-410A

Front

A heat pump in heating mode operates by:

Back

b) Absorbing heat from the outdoor air and transferring it inside

Front

What device protects an HVAC system from excessive electrical current?

Back

b) Fuse