Jindal Steel and Power Diploma Electrical Engineer Interview Questions and Answers

I am a dedicated and experienced Electrical Engineer with a passion for problem-solving and innovation.

• Graduated with a degree in Electrical Engineering from XYZ University

• Completed internships at ABC Company and DEF Corporation

• Proficient in CAD software and circuit design

• Led a team in developing a new power distribution system for a commercial building

A thyristor is a semiconductor device that acts as a switch and can handle high voltages and currents.

• It has three terminals: anode, cathode, and gate

• It can be turned on by applying a small current to the gate terminal

• It can handle high power and is commonly used in power control applications

• Examples include AC motor speed control, lighting dimming, and power supplies

DC motors use direct current to generate rotational motion, while AC motors use alternating current.

• DC motors have a commutator and brushes to switch the current direction

• AC motors have a stator and rotor to create a rotating magnetic field

• DC motors are commonly used in household appliances and electric vehicles

• AC motors are commonly used in industrial machinery and HVAC systems

An induction furnace uses electromagnetic induction to heat and melt metals efficiently and precisely.

• Works on the principle of electromagnetic induction, where alternating current generates a magnetic field.

• The magnetic field induces eddy currents in the metal charge, causing it to heat up due to resistance.

• Commonly used for melting ferrous and non-ferrous metals, such as steel and aluminum.

• Induction furnaces are ener...read more

A gate-to-cathode value over 30 mohm can indicate potential issues in circuit performance and component reliability.

• Higher resistance can lead to increased power loss in the circuit.

• It may cause slower switching speeds in semiconductor devices.

• In power electronics, it can affect the efficiency of converters.

• Example: In MOSFETs, a high gate-to-cathode resistance can lead to inadequate gate drive, affecting performance.

Cranes typically use electric motors, especially AC motors, for their efficiency and control in heavy lifting applications.

• AC motors are commonly used due to their durability and efficiency.

• DC motors can also be used for precise control in smaller cranes.

• Synchronous motors are preferred for high-speed applications.

• Example: Electric hoists in overhead cranes often use three-phase AC motors.