KocharTech Senior Electrician Interview Questions, Process, and Tips

Star-delta connection is a method used to connect three-phase electrical motors.

• It is also known as a wye-delta connection.

• It is used to reduce the starting current and torque in induction motors.

• In star connection, all three motor terminals are connected together to form a common point.

• In delta connection, the three motor terminals are connected in a triangular shape.

• During starting, the motor is connected in star con...read more

Two-phase supply is a type of electrical power distribution system that uses two alternating currents with a phase difference of 90 degrees.

• Two-phase supply consists of two alternating currents that are 90 degrees out of phase with each other.

• It is commonly used in older electrical systems and is being phased out in favor of three-phase supply.

• Each phase carries a sinusoidal waveform, and the combination of the two pha...read more

MCB stands for Miniature Circuit Breaker, it is an electrical switch that automatically protects an electrical circuit from damage caused by overload or short circuit. A relay switch is an electrically operated switch that uses an electromagnet to mechanically control the opening and closing of a circuit.

• MCB is a type of circuit breaker that is commonly used in residential and commercial electrical installations.

• It is ...read more

When the MCB is off, it means that the circuit is disconnected and no electrical current is flowing.

• MCB stands for Miniature Circuit Breaker.

• When the MCB is off, it indicates a fault or overload in the circuit.

• Turning off the MCB is a safety measure to prevent electrical accidents or damage to the circuit.

• Examples of situations when the MCB may be off include a short circuit, an overloaded circuit, or a fault in the el