Fabulous Media Interview Questions and Answers

Improving power factor can be done by using capacitors, synchronous motors, and active power filters.

• Installing capacitors to reduce reactive power consumption

• Using synchronous motors to improve power factor

• Using active power filters to reduce harmonic distortion

• Implementing power factor correction techniques

• Reducing the use of inductive loads

• Proper maintenance of electrical equipment

• Educating employees on energy-efficient practices

Transformer earthing types include solid earthing, resistance earthing, and reactance earthing. The size of the transformer neutral earthing conductor depends on the transformer rating.

• Solid earthing involves connecting the transformer neutral directly to the earth

• Resistance earthing involves connecting a resistor between the transformer neutral and earth

• Reactance earthing involves connecting a reactor between the transformer neutral and earth

• The size of the transformer neutr...read more

Induction motor works on the principle of electromagnetic induction and has two types - single-phase and three-phase.

• Induction motor has a stator and a rotor

• The stator has a set of windings that are supplied with AC current

• This current creates a rotating magnetic field that induces a current in the rotor

• The rotor then starts rotating due to the interaction of the magnetic fields

• Single-phase induction motors are used in small appliances while three-phase induction motors are u...read more

AC drives are used for high power applications and DC drives are used for low power applications.

• AC drives are more efficient than DC drives.

• AC drives are more expensive than DC drives.

• DC drives are simpler and easier to control than AC drives.

• DC drives are commonly used in small motors and appliances.

• AC drives are commonly used in large motors and industrial applications.

ACB stands for Air Circuit Breaker. It works on the principle of thermal and magnetic tripping.

• ACB is used to protect electrical equipment from overcurrent and short circuit faults.

• It consists of a set of contacts that open and close to interrupt or allow the flow of current.

• The thermal tripping mechanism operates based on the heat generated by the current flowing through the contacts.

• The magnetic tripping mechanism operates based on the magnetic field generated by the curren...read more