Test Engineer 1

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Test Engineer 1 Interview Questions and Answers for Freshers

Updated 19 Jun 2022

Q1. Draw a circuit for controlling DC motor using power electronic devices?

Ans.

A circuit for controlling DC motor using power electronic devices.

  • Use a MOSFET or IGBT to switch the motor on and off

  • Use a diode to protect the MOSFET or IGBT from reverse voltage

  • Use a PWM signal to control the speed of the motor

  • Use a flyback diode to protect the MOSFET or IGBT from voltage spikes

  • Use a capacitor to smooth out the voltage to the motor

Q2. Explain operation of DAB?

Ans.

DAB stands for Digital Audio Broadcasting. It is a digital radio technology used for broadcasting radio stations.

  • DAB uses digital signals to transmit audio instead of analog signals.

  • It provides better sound quality and more stations can be broadcasted in the same frequency band.

  • DAB also provides additional information like song title, artist name, and news headlines.

  • DAB is used in many countries around the world, including the UK, Germany, and Australia.

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