Rashmi Metaliks Junior Engineer Interview Questions, Process, and Tips

MCB and overload relay are both electrical protection devices, but they serve different purposes.

• MCB stands for Miniature Circuit Breaker and is used to protect electrical circuits from overcurrents and short circuits.

• Overload relay is used to protect motors and other electrical equipment from excessive current that can cause overheating and damage.

• MCB operates based on the principle of thermal and magnetic tripping, w...read more

A soft starter is a device used to gradually start and stop the motor by controlling the voltage applied to it.

• Soft starters are used to reduce the starting current and torque of an electric motor.

• They provide a smooth and controlled acceleration and deceleration of the motor.

• Soft starters can be used in various applications such as pumps, fans, and conveyor belts.

• They typically consist of power electronics, control ci...read more

A drive is a device that reads and writes data to storage media, allowing users to access and store information.

• Drives can be internal or external, such as hard disk drives (HDDs) or solid-state drives (SSDs).

• They use various technologies like magnetic or flash memory to store data.

• Drives are connected to a computer or device through interfaces like SATA, USB, or PCIe.

• They have controllers that manage data transfer and...read more

Star delta starters are used to reduce the starting current of induction motors.

• Star delta starters are used in applications where the starting current needs to be limited.

• They are commonly used in industries where large motors are employed.

• By starting the motor in star configuration, the current is reduced to one-third of the delta configuration.

• This helps in preventing excessive voltage drop and reduces stress on the...read more

The protection of a transformer involves various measures to ensure its safe and reliable operation.

• Overcurrent protection: Protects against excessive current flow.

• Overvoltage protection: Guards against high voltage surges.

• Under/over frequency protection: Monitors and controls the frequency of the input power.

• Temperature protection: Prevents overheating by monitoring the transformer's temperature.

• Buchholz relay protect...read more