Lucy Electric Electrical Engineer Interview Questions and Answers for Freshers

Regarding electrical project related discussion

Q1. Explain working of ac-dc converter
Ans. 
AC-DC converter converts alternating current (AC) to direct current (DC) for various applications.
• AC voltage is converted to DC voltage using rectifiers

• Rectifiers can be half-wave, full-wave, or bridge rectifiers

• Filtering is done to smooth out the output voltage

• Examples include power supplies for electronic devices and battery chargers
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Q2. PWM techniques, M. Tech project,
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Q1. Process knowledge on Electroplating Process from start to end
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Q1. Salary discussion
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Q1. Your personal information
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Q2. Why did you choose Electrical Engineering?
Ans. 
I chose Electrical Engineering because of my passion for understanding and working with technology.
• Fascination with technology and how things work

• Interest in problem-solving and innovation

• Desire to contribute to advancements in the field

• Enjoyment of hands-on projects and experimentation
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Q1. Why gravels are usesd in switch yard?
Ans. 
Gravels are used in switch yards to provide a stable surface for equipment and to improve drainage.
• Gravels help in reducing the risk of equipment damage due to flooding or standing water.

• They also help in preventing erosion and maintaining the stability of the ground.

• Gravels are easy to install and maintain, making them a cost-effective option for switch yards.

• They allow for better heat dissipation, which is important ...read more
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Q2. Draw a SLD of 33/11 kv switchyard and explain equipments ?
Ans. 
A Single Line Diagram (SLD) of a 33/11 kV switchyard shows the layout and connections of electrical equipment.
• Key equipments include transformers, circuit breakers, isolators, busbars, surge arresters, and control panels.

• Transformers step down voltage from 33 kV to 11 kV for distribution.

• Circuit breakers protect the system from overloads and short circuits.

• Isolators are used for isolating equipment for maintenance.

• Busb...read more
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Q3. What is OC and SC test of transformer ?
Ans. 
OC and SC tests are conducted on transformers to determine their efficiency and performance under different load conditions.
• OC test (Open Circuit test) is conducted to determine the no-load loss and magnetizing impedance of the transformer.

• SC test (Short Circuit test) is conducted to determine the full-load copper loss and equivalent resistance of the transformer.

• Both tests help in evaluating the efficiency and voltage...read more
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Q1. Document-related & salary related
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Q2. Location-related & Bike minority
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