Lakshmi Machine Works Electrical Engineer Interview Questions and Answers

Q1. A 22 kw AOP motor CT cable burn again and again what is the reason ?
Ans. 
The repeated burning of a 22 kW AOP motor CT cable may be due to overloading, short circuits, poor insulation, or incorrect cable sizing.
• Check for overloading of the motor causing excessive heat in the cable

• Inspect for short circuits in the motor or the wiring

• Ensure proper insulation of the cable to prevent overheating

• Verify if the cable size is appropriate for the motor's power requirements
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Q2. When CT of AOP motor is bypassed then what effect on the motor ?
Ans. 
Bypassing the CT of an AOP motor can lead to overcurrent and damage to the motor.
• Bypassing the CT can result in the motor drawing excessive current.

• This can lead to overheating of the motor windings.

• Overcurrent can cause damage to the motor components.

• It can also pose a safety risk due to potential electrical faults.
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Q1. What is motor in electrical
Ans. 
A motor in electrical engineering is a device that converts electrical energy into mechanical energy.
• Motors are commonly used in various applications such as industrial machinery, household appliances, and electric vehicles.

• There are different types of motors including DC motors, AC motors, and stepper motors.

• Motors consist of a rotor and a stator, with the rotor rotating when electrical current is applied.

• The speed an...read more
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Q2. Introduce yourself by technically
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Q1. What is VFD work
Ans. 
VFD stands for Variable Frequency Drive, which is a type of motor controller that drives an electric motor by varying the frequency and voltage supplied to the motor.
• VFDs are used to control the speed and torque of AC motors in various applications.

• They are commonly used in HVAC systems, industrial pumps, conveyor systems, and machine tools.

• VFDs can help save energy by adjusting motor speed to match the actual load req...read more
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Q1. What's your name and qualifications
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Q2. What is your qualifications and experience
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Basic Engineering technology

Q1. Basic engineering technology about
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Q2. Basic engineering question
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Q1. Details about home work
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Q1. What is the synchronisation process of plant ?
Ans. 
Synchronisation process of a plant involves matching the frequency, voltage, and phase angle of the incoming generator with the grid.
• Ensure the generator frequency matches the grid frequency (50Hz or 60Hz).

• Match the voltage levels of the generator with the grid.

• Adjust the phase angle of the generator to synchronize with the grid.

• Use synchronizing equipment like synchroscope or synchronizing lamps to ensure proper synch...read more
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Q2. Brief discussion about alternator and transformer protection system ?
Ans. 
Alternator and transformer protection systems are essential for preventing damage and ensuring safe operation.
• Alternator protection systems typically include overcurrent, overvoltage, and reverse power protection to safeguard the alternator from damage.

• Transformer protection systems often involve differential protection, overcurrent protection, and temperature monitoring to prevent overheating and insulation breakdown.

• ...read more
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Logical Reasoning, English Quant, Aptitude

Q1. Question on Technical Knowledge
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Q2. Ask About Your Experience and Background
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Q1. Introduction about Myself
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Q1. Technical questions
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Q1. Related your experience and working areas
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Q1. Industrial safety
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