Young Engg. & Calibration Services Junior Calibration Engineer Interview Questions and Answers

Questions were from 10th standard maths, reasoning and little bit from core domain.

Q1. What will happen if we connect 3 phase motor to 1 phase? Explain lenzs law. Some very basic questions like that.
Ans. 
Connecting a 3 phase motor to 1 phase can cause motor damage and inefficient operation.
• Connecting a 3 phase motor to 1 phase can lead to overheating and reduced torque.

• The motor may not start or run at a slower speed than intended.

• The motor windings may get damaged due to unbalanced currents.

• Using a phase converter or rewiring the motor can be potential solutions.
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Mth,reasoning and core basics

Q1. How DC motor prodeuces back emf? How ammeter work? Range extention method.
Ans. 
DC motors produce back EMF through the interaction of the magnetic field and the rotating armature.
• Back EMF is generated when the armature of a DC motor rotates within a magnetic field.

• The back EMF opposes the applied voltage and is proportional to the speed of the motor.

• Back EMF is important for motor control and can be used to estimate motor speed.

• Ammeters measure the current flowing through a circuit.

• They are connec...read more
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