Torrent Power Assistant Electrical Engineer Interview Questions and Answers

Insulators are materials used to prevent the flow of electricity. They must have high resistivity, mechanical strength, and thermal stability.

• Types of insulators include porcelain, glass, polymer, and ceramic.

• Requirements for insulators include high resistivity to prevent leakage current, mechanical strength to withstand mechanical stress, and thermal stability to withstand temperature variations.

• Examples of insulators...read more

Wind turbines convert the kinetic energy of the wind into mechanical power, which is then converted into electricity.

• Wind turns the blades of the turbine

• Blades are connected to a rotor

• Rotor spins a generator to produce electricity

• Electricity is then sent to the grid for distribution

Types of generators include diesel, gas, and wind generators. Types of circuit breakers include air, oil, and vacuum circuit breakers.

• Types of generators: diesel, gas, wind

• Types of circuit breakers: air, oil, vacuum

Isolator is used for isolating a circuit whereas circuit breaker is used for breaking a circuit during fault conditions.

• Isolator is a mechanical switch used for isolating a circuit from the power source.

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

• Isolators do not have any interrupting capacity, while circuit breakers can interrupt the...read more

AC motor speed can be controlled using methods like voltage control, frequency control, and pole changing.

• Voltage control: Adjusting the voltage supplied to the motor to change its speed.

• Frequency control: Changing the frequency of the AC power supplied to the motor to control its speed.

• Pole changing: Altering the number of poles in the motor to adjust its speed.

• Using variable frequency drives (VFDs) for precise speed

A transformer is a device that transfers electrical energy between two or more circuits through electromagnetic induction.

• Transformers consist of two coils of wire, known as the primary and secondary coils.

• The primary coil is connected to a power source, creating a magnetic field when current flows through it.

• This magnetic field induces a voltage in the secondary coil, transferring energy from the primary to the second...read more