Deccan Technosecurity & Utility Services Hvac Technician Interview Questions, Process, and Tips

HVAC theory involves understanding the principles of heating, ventilation, and air conditioning systems.

• Understanding thermodynamics and heat transfer

• Knowledge of refrigeration cycles and components

• Familiarity with air distribution systems and ductwork design

• Ability to troubleshoot and diagnose HVAC systems

• Awareness of energy efficiency and environmental regulations

Validation process in HVAC involves verifying that the system meets specified requirements and functions correctly.

• Validation process ensures that the HVAC system is installed correctly and operates as intended.

• It involves testing the system to confirm that it meets design specifications and performance criteria.

• Validation may include checking airflow, temperature control, humidity levels, and energy efficiency.

• Documen...read more

The approach in chiller involves understanding the components, troubleshooting common issues, and performing regular maintenance.

• Understand the basic components of a chiller such as the compressor, condenser, evaporator, and expansion valve.

• Troubleshoot common issues like low refrigerant levels, dirty condenser coils, or faulty sensors.

• Perform regular maintenance tasks like cleaning coils, checking for leaks, and ensur...read more

Processing in AHU involves filtering, heating or cooling, and distributing air throughout a building.

• Start by ensuring the air filters are clean and in good condition.

• Adjust the temperature settings on the AHU to provide the desired heating or cooling.

• Check the fan and motor to ensure they are functioning properly.

• Inspect the ductwork for any leaks or blockages that may hinder air flow.

• Monitor the air pressure and adju...read more

Maintaining relative humidity and temperature is crucial for HVAC systems to ensure comfort and efficiency.

• Regularly check and calibrate thermostats and humidistats

• Ensure proper insulation and sealing of windows and doors to prevent heat loss or gain

• Regularly clean and replace air filters to maintain airflow and prevent buildup of dust and debris

• Use programmable thermostats to adjust temperature settings based on occup...read more

Maintaining differential pressure involves regular monitoring, adjusting airflow, checking filters, and ensuring proper equipment functioning.

• Regularly monitor differential pressure readings to ensure they are within acceptable range

• Adjust airflow dampers to balance pressure between different areas

• Check and replace air filters regularly to prevent blockages and maintain proper airflow

• Ensure equipment such as fans and d...read more