AC Technician Interview Questions and Answers for Freshers

Yes, I am capable of repairing PCB boards of electronic components.

• I have experience in troubleshooting and repairing PCB boards.

• I am familiar with using multimeters, oscilloscopes, and other diagnostic tools.

• I have knowledge of soldering and desoldering techniques.

• I am able to read and interpret schematics and datasheets.

• I have repaired PCB boards for various electronic devices such as air conditioners, refrigerators, and televisions.

The question is about maintaining -18 temperature while charging gas in Kc compressor.

• Use a refrigerant with a boiling point lower than -18°C

• Ensure proper insulation of the refrigeration system

• Check for any leaks in the system

• Adjust the expansion valve to maintain the desired temperature

• Regularly clean the condenser and evaporator coils

Testing of air conditioner and wifi module involves checking their functionality and connectivity.

• For air conditioner testing, check the temperature, airflow, and refrigerant levels.

• For wifi module testing, check the signal strength, connectivity, and speed.

• Use specialized tools like a thermometer, pressure gauge, and network analyzer for accurate testing.

• Perform regular maintenance and updates to ensure optimal performance.

• Test the integration of the wifi module with the air...read more

Phase reversal can be identified by checking the rotation direction of the motor or using a phase rotation meter.

• Check the rotation direction of the motor - if it is rotating in the opposite direction, it indicates a phase reversal

• Use a phase rotation meter to determine the sequence of the phases and identify any phase reversals

• Consult the wiring diagram of the system to ensure correct phase connections

To find out tangents, use trigonometric functions like tan() or calculate the ratio of opposite side to adjacent side in a right triangle.

• Use the tan() function in a calculator or programming language to find the tangent of an angle.

• In a right triangle, the tangent of an angle can be calculated by dividing the length of the side opposite the angle by the length of the side adjacent to the angle.

• Remember that the tangent function is defined as the ratio of the opposite side to...read more

AC purpose is to cool and dehumidify indoor air, while electrical purpose is to power the AC unit.

• AC purpose is to regulate temperature and humidity in indoor spaces.

• Electrical purpose is to provide the necessary power for the AC unit to function.

• ACs use refrigeration cycles to cool the air and remove moisture.

• Electrical components in an AC unit include compressors, fans, and motors.

• ACs are commonly used in homes, offices, and vehicles to provide comfort.

• Electrical wiring and...read more