L&T Construction Electrical GET Interview Questions and Answers

90 question 90 min comprising of Logical and domain and communication

Q1. Core questions from Electrical subjects
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Q2. Ohm's law limitations
Ans. 
Ohm's law is limited to linear, passive circuits with constant temperature and material properties.
• Ohm's law only applies to linear circuits where voltage is directly proportional to current.

• It assumes constant temperature and material properties, which may not always be the case.

• Non-linear components like diodes and transistors do not follow Ohm's law.

• Ohm's law does not account for reactive components like capacitors ...read more
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Q1. About family and general questions
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Hard but medium not very easy but not so hard

Q1. M15 ratio? In construction
Ans. 
M15 ratio is the mix ratio of cement, sand, and aggregate in construction.
• M15 ratio is commonly used in construction for preparing concrete.

• It refers to the mix ratio of 1:2:4, which means 1 part cement, 2 parts sand, and 4 parts aggregate.

• This ratio is suitable for general construction purposes where high strength is not required.
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Q2. Initial setting time of rhc?
Ans. 
Initial setting time of rhc is the time taken for the cement paste to lose its plasticity and become rigid.
• Initial setting time is typically around 30 minutes for ordinary Portland cement.

• It is influenced by factors such as temperature, water-cement ratio, and type of cement used.

• Testing for initial setting time is done using the Vicat apparatus.
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Q1. Why should we hire you?
Ans. 
I bring a strong foundation in electrical engineering, practical experience, and a passion for innovation that aligns with your company's goals.
• Solid academic background: Graduated with a degree in Electrical Engineering with top honors.

• Hands-on experience: Completed internships where I designed and implemented circuit systems, improving efficiency by 20%.

• Team player: Collaborated on a project that developed a renewabl...read more
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Q2. Why you want this job?
Ans. 
I am passionate about electrical engineering and eager to contribute my skills to innovative projects that drive technological advancement.
• I have a strong foundation in electrical engineering principles, demonstrated through my academic projects, such as designing a solar-powered device.

• I am excited about the opportunity to work with cutting-edge technology and contribute to sustainable energy solutions.

• This position a...read more
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Normal SubPar Questions

Q1. Explain working of Transformer
Ans. 
A transformer is a device that transfers electrical energy between two or more circuits through electromagnetic induction.
• Transformers work on the principle of electromagnetic induction

• They have primary and secondary coils wound around a core

• Step-up transformers increase voltage while step-down transformers decrease voltage

• Efficiency of a transformer is determined by its core material and design
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Q2. Explain working of Synchronous Motor
Ans. 
Synchronous motor is a type of AC motor where the rotation of the shaft is synchronized with the frequency of the supply current.
• Synchronous motor has a rotor with electromagnets and stator with field windings.

• The rotor rotates at the same speed as the rotating magnetic field produced by the stator.

• It requires DC excitation to create a magnetic field in the rotor.

• Used in applications where constant speed is required, s...read more
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Q3. Explain method of Torque Variation of Squirrel Cage Motor.
Ans. 
Torque variation in squirrel cage motors is achieved by changing the rotor resistance.
• Torque in squirrel cage motors can be varied by changing the rotor resistance.

• Increasing the rotor resistance will increase the torque produced by the motor.

• Decreasing the rotor resistance will decrease the torque produced by the motor.

• This method is commonly used in applications where variable torque is required, such as in fans or p...read more
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Q4. Multiple questions on Slip of Induction Motor
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Q5. Speed and Torque Variation Methods
Ans. 
Speed and torque variation methods are used in electrical systems to control the performance of motors.
• Speed variation methods include changing the frequency of the power supply or using variable speed drives.

• Torque variation methods involve adjusting the voltage or current supplied to the motor.

• Examples of speed variation methods include VFDs (Variable Frequency Drives) and soft starters.

• Examples of torque variation m...read more
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It contains basic logical reasoning questions

Q1. Round 2 is Technical interview where they ask very basic to medium level difficulty questions
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