Larsen & Toubro Limited Manager – Electrical Interview Questions and Answers

Quant questions, logical questions, Time and series Questions.

Q1. 1. Electrical Basics level question, SLD for Distribution system.
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Q2. Electrical Load calculation for Construction works.
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Electrical load calculation is crucial for construction works to ensure proper electrical system design and prevent overloading.
• Determine the total connected load of all electrical equipment and appliances

• Calculate the demand load based on the expected usage of the equipment and appliances

• Consider diversity factors to account for the likelihood of all equipment being used simultaneously

• Add safety factors to ensure the ...read more
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Q1. Self introduction
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Q2. Previous experience and languages
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Q1. What about synchronous motor principal
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Synchronous motors operate at a constant speed determined by the frequency of the power source.
• Synchronous motors have a rotor that rotates at the same speed as the rotating magnetic field in the stator.

• They are used in applications where constant speed is required, such as in industrial processes or power generation.

• Synchronous motors are more efficient than induction motors at higher loads.

• They require a separate DC ...read more
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Q2. Difference between induction and synchronous motor
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Induction motors rely on induction to produce torque, while synchronous motors require a magnetic field to rotate at a constant speed.
• Induction motors do not require any external connections to the rotor, while synchronous motors need a DC power source to create the magnetic field.

• Induction motors are self-starting, while synchronous motors require external means to start.

• Induction motors are more commonly used in indu...read more
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