L&T Power Diploma Trainee Engineer Interview Questions and Answers

Q1. What is transformer?
Ans. 
A transformer is a static electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.
• Consists of two or more coils of insulated wire wound around a core

• Primary coil receives electrical energy and induces a magnetic field in the core

• Secondary coil receives the magnetic field and converts it back into electrical energy

• Used in power distribution, voltage regulation, a...read more
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Q2. What is transformer principle?
Ans. 
Transformer principle is based on the phenomenon of electromagnetic induction, where changing magnetic field induces voltage in a coil.
• Transformers work on the principle of electromagnetic induction

• They consist of two coils, primary and secondary, linked by a magnetic core

• When alternating current flows through the primary coil, it creates a changing magnetic field

• This changing magnetic field induces a voltage in the se...read more
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Q1. What is electricity, what is circuit
Ans. 
Electricity is the flow of electric charge through a conductor, while a circuit is a closed loop through which electricity can flow.
• Electricity is the flow of electrons through a conductor

• A circuit is a closed loop that allows electricity to flow

• Circuits can contain components like resistors, capacitors, and inductors

• There are two types of circuits - series circuits and parallel circuits

• Examples of circuits include sim...read more
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Q2. What is solar cell, wahtndkkslallkajjnnejsz
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Medium Reasoning and Math. English

Q1. Electro magnetic induction law. Kirchhoaf law. Low voltage & High voltage circuit breaker. Kw & Kva difference. Power factor. Reactive power & apparent power. Isolatar. 33/11 kva substation. Bridge rectifi...read more
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Basics of arithmetic operations and aptitude tests

Q1. Basic electrical engineering questions
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Q2. Explain the generation of electricity
Ans. 
Electricity is generated by converting mechanical energy, chemical energy, or solar energy into electrical energy.
• Mechanical energy is converted into electrical energy through generators in power plants.

• Chemical energy is converted into electrical energy through batteries or fuel cells.

• Solar energy is converted into electrical energy through photovoltaic cells.

• Electricity can also be generated through nuclear reactions...read more
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About substation details, Components working

Preparation of interview with best regards

Q1. Rotary and static equipment
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Q2. Pump and vessel experience
Ans. 
I have experience working with pumps and vessels in various projects during my diploma in Mechanical Engineering.
• I have hands-on experience in designing, installing, and maintaining pumps and vessels for different industrial applications.

• I am familiar with different types of pumps such as centrifugal pumps, reciprocating pumps, and gear pumps.

• I have worked on sizing and selecting pumps based on the flow rate, head, and...read more
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Q3. Rotary and static equipment pump gearbox
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Q4. Exchanger and colme
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Q5. Vesale experience
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Q1. Explain the wind power plant
Ans. 
A wind power plant is a facility that harnesses the power of wind to generate electricity.
• Wind power plants consist of wind turbines that convert the kinetic energy of wind into electrical energy.

• The turbines are typically mounted on tall towers to capture the stronger and more consistent winds at higher altitudes.

• The blades of the turbine rotate when the wind blows, which in turn rotates a generator to produce electri...read more
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Q2. Explain the wind power plant motor
Ans. 
A wind power plant motor is a device that converts wind energy into electrical energy.
• Wind power plants use turbines to capture the kinetic energy of the wind.

• The wind turns the blades of the turbine, which are connected to a generator.

• The generator converts the rotational energy into electrical energy.

• The electrical energy is then transmitted through power lines for distribution.

• Wind power plants can have different ty...read more
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Q1. Explain the wind power plant maintenance
Ans. 
Wind power plant maintenance involves regular inspections, repairs, and servicing to ensure optimal performance and longevity.
• Regular inspections are conducted to identify any issues or potential problems.

• Repairs and replacements are carried out as needed to fix any faulty components.

• Servicing includes cleaning, lubricating, and adjusting various parts of the wind turbines.

• Maintenance also involves monitoring and analy...read more
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