Electrical Manufacturing Company Interview Questions and Answers

Transformers are electrical devices that transfer energy from one circuit to another through electromagnetic induction.

• Transformers work on the principle of electromagnetic induction

• They consist of two coils, primary and secondary, wound around a magnetic core

• When an alternating current flows through the primary coil, it creates a magnetic field which induces a voltage in the secondary coil

• Transformers are used to step...read more

Motors require a load to convert electrical energy into mechanical energy.

• A motor works by converting electrical energy into mechanical energy

• The load is the object that the motor is designed to move or operate

• Without a load, the motor may spin uncontrollably or not at all

• Examples of loads include fans, pumps, conveyor belts, and elevators

A relay is an electrically operated switch that uses an electromagnet to mechanically operate a switch.

• Relays are used to control high power circuits with low power signals

• They can be used for various applications such as controlling motors, lights, and heating elements

• Types of relays include electromagnetic relays, solid-state relays, thermal relays, and reed relays

A circuit breaker is an electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit.

• Circuit breakers automatically detect faults in the electrical system and interrupt the flow of electricity to prevent damage.

• They come in different types such as thermal-magnetic, magnetic, and hydraulic-magnetic circuit breakers.

• Common examples include miniature circuit breakers (MCB), m...read more

A resistor is an electrical component that resists the flow of electric current. There are various types of resistors based on their construction and materials used.

• Resistors are used to limit the flow of current in a circuit.

• Types of resistors include carbon film, metal film, wirewound, and variable resistors.

• Resistors are measured in ohms (Ω) and have color-coded bands to indicate their resistance value.

A resistor is an electrical component that resists the flow of electrical current, causing a drop in voltage.

• Resistors are used to control the amount of current flowing in a circuit.

• They are measured in ohms (Ω) and have color-coded bands to indicate their resistance value.

• Resistors can be fixed or variable, with variable resistors allowing for adjustable resistance.

• Examples of resistors include carbon film resistors, ...read more

A diode is a semiconductor device that allows current to flow in one direction only.

• Diodes are made of semiconductor materials such as silicon or germanium.

• They have two terminals - an anode (positive) and a cathode (negative).

• When a voltage is applied across the diode in the forward direction, it allows current to flow.

• In the reverse direction, the diode blocks the current flow.

• Diodes are commonly used in rectifiers, ...read more

A diode is a semiconductor device that allows current to flow in one direction only. Types include PN junction diode, Zener diode, Schottky diode, and LED.

• Diode is a semiconductor device with two terminals that allows current to flow in one direction only

• Types of diodes include PN junction diode, Zener diode, Schottky diode, and LED

• PN junction diode is the most common type, made of P-type and N-type semiconductor mater...read more

Transformers, bushings, relays, and buck converters are all electrical components used in power systems.

• Transformers are devices that transfer electrical energy from one circuit to another through electromagnetic induction.

• Bushings are insulating structures that allow electrical conductors to pass through walls or barriers without allowing current to leak.

• Relays are switches that are operated electrically and used to c...read more

A transformer is an electrical device that transfers electrical energy from one circuit to another through electromagnetic induction.

• Transformers are used to increase or decrease the voltage of an alternating current (AC) power supply.

• They consist of two coils of wire, known as the primary and secondary coils, which are wrapped around a magnetic core.

• When an AC voltage is applied to the primary coil, it creates a magne...read more

Induction motors operate on electromagnetic induction, converting electrical energy into mechanical energy without needing brushes.

• Induction motors consist of a stator and rotor; the stator generates a rotating magnetic field.

• The rotor, placed inside the stator, induces current due to the changing magnetic field, creating torque.

• Common types include squirrel cage and wound rotor induction motors; squirrel cage is widel...read more