Ig3 Infra Hvac Technician Interview Questions and Answers

An expansion valve is a device that regulates the flow of refrigerant into the evaporator coil in an air conditioning system.

• It is a component of the refrigeration cycle

• It controls the flow of refrigerant into the evaporator coil

• It maintains a constant pressure difference across the evaporator coil

• It helps to regulate the temperature of the refrigerant

• Examples include thermostatic expansion valves and electronic expans

The pressure of R22 varies depending on its temperature and state.

• At -40°C, the pressure of R22 is 0.5 psi for vapor and 0.1 psi for liquid.

• At -20°C, the pressure of R22 is 7.2 psi for vapor and 27.6 psi for liquid.

• At 0°C, the pressure of R22 is 57.9 psi for vapor and 70.2 psi for liquid.

• At 20°C, the pressure of R22 is 116.2 psi for vapor and 126.9 psi for liquid.

• At 40°C, the pressure of R22 is 199.2 psi for vapor and

Vapor refrigeration cycle is a thermodynamic cycle used in refrigeration systems to transfer heat from a low temperature source to a high temperature sink.

• The cycle consists of four main components: compressor, condenser, expansion valve, and evaporator.

• Refrigerant vapor is compressed by the compressor, increasing its temperature and pressure.

• The high-pressure, high-temperature vapor then flows to the condenser where i...read more

HVAC stands for Heating, Ventilation, and Air Conditioning. It refers to the systems used to control the temperature, humidity, and air quality in buildings.

• HVAC systems are responsible for heating and cooling buildings to maintain a comfortable environment for occupants.

• Ventilation systems help circulate and filter air to improve indoor air quality.

• Air conditioning systems remove heat and humidity from the air to cool...read more

Maintain pressures and temperature in clean room by using HVAC systems, monitoring sensors, adjusting airflow, and conducting regular maintenance.

• Use HVAC systems to control temperature and humidity levels

• Monitor pressure differentials to ensure clean room integrity

• Adjust airflow to maintain desired conditions

• Regularly calibrate sensors and equipment

• Perform routine maintenance on HVAC systems

I worked at ABC Heating and Cooling for 5 years as an HVAC Technician.

• Worked at ABC Heating and Cooling for 5 years

• Performed maintenance and repairs on HVAC systems

• Installed new HVAC units for residential and commercial clients

I have 5 years of experience working as an HVAC technician in both residential and commercial settings.

• 5 years of experience in HVAC technician role

• Worked in both residential and commercial settings

• Skilled in troubleshooting and repairing HVAC systems

• Familiar with HVAC codes and regulations

• Certified in handling refrigerants