Lumax Industries Electrical Maintenance Engineer Interview Questions and Answers

Simple maths questions which were the simple formula based.

Q1. Just introduction and 1 -2 technical questions
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Q2. Tell me about yourself What is motor & generator
Ans. 
Motors and generators are electrical machines that convert electrical energy into mechanical energy and vice versa.
• A motor is a device that converts electrical energy into mechanical energy to produce motion. It works on the principle of electromagnetic induction.

• A generator is a device that converts mechanical energy into electrical energy. It works on the principle of Faraday's law of electromagnetic induction.

• Motors...read more
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Q1. What is a synchronisation panel for DG?
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A synchronisation panel for DG is used to synchronize multiple generators to ensure they are running in parallel and sharing the load evenly.
• Synchronisation panels are used in situations where multiple diesel generators need to be connected in parallel to supply power to a common bus.

• The panel monitors the frequency, voltage, and phase angle of each generator and ensures they are synchronized before connecting them to ...read more
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Q2. What is Pulse width in laser ?
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Pulse width in laser refers to the duration of time that a laser beam is emitted.
• Pulse width is measured in seconds or milliseconds.

• It determines the amount of energy delivered by the laser beam.

• Shorter pulse widths are often used for precision cutting or welding.

• Longer pulse widths are used for applications like material processing or drilling.
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Q3. What is BDV of Transformer oil?
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BDV stands for Breakdown Voltage. It is a measure of the dielectric strength of transformer oil.
• BDV is the voltage at which the insulation between two conductors breaks down.

• It is an important parameter to determine the quality of transformer oil.

• BDV is usually measured in kilovolts (kV).

• Higher BDV indicates better quality and higher dielectric strength of the oil.
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Q4. How RTCC panel works?
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RTCC panel stands for Remote Tap Changing Control panel, used in power transformers to automatically adjust the voltage ratio.
• RTCC panel monitors the load and voltage levels of the transformer.

• It automatically adjusts the tap changer to maintain the desired voltage ratio.

• RTCC panel can be programmed to operate based on specific parameters like load current, temperature, etc.

• It helps in optimizing the transformer perfor...read more
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Q1. About background , why you leave from previous company, why you want to join our company.
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Q1. PLC
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Q1. What is the unit of resistance ?
Ans. 
The unit of resistance is Ohm (Ω).
• The unit of resistance is denoted by the symbol Ω (Ohm)

• Resistance is measured in Ohms

• Named after German physicist Georg Simon Ohm

• Commonly used in electrical circuits
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Q2. Define the ohm law
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Ohm's Law states that the current flowing through a conductor is directly proportional to the voltage across it and inversely proportional to the resistance.
• Ohm's Law is represented by the formula V = IR, where V is voltage, I is current, and R is resistance.

• It helps in calculating the relationship between voltage, current, and resistance in an electrical circuit.

• It is named after the German physicist Georg Simon Ohm w
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Our discussion was on how to maintain electrical machines healthy .So we discussed and found many ideas .It was really nice discussion i had

Q1. What you do for making yourself confidential ?
Ans. 
I ensure confidentiality by following company policies, maintaining data security, and keeping sensitive information private.
• Adhering to company policies regarding confidentiality

• Using secure methods for storing and transmitting data

• Avoiding discussing sensitive information with unauthorized individuals
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Q2. Whats your strengths ?
Ans. 
My strengths include strong problem-solving skills, attention to detail, and ability to work well under pressure.
• Strong problem-solving skills

• Attention to detail

• Ability to work well under pressure
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Q1. What is voltage define it?
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Voltage is the difference in electric potential between two points in a circuit, measured in volts.
• Voltage is the force that pushes electric current through a circuit

• It is measured in volts (V)

• Voltage is the potential difference between two points in a circuit

• Higher voltage means more energy available to move electrons

• Voltage can be DC (direct current) or AC (alternating current)
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Q1. What is mechanism in Hydraulic press
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The mechanism in a hydraulic press is the system of components that allows for the transmission of force through a fluid to generate a large amount of pressure.
• Hydraulic press uses a hydraulic cylinder to generate force.

• The force is transmitted through a fluid, typically oil or water.

• The mechanism includes valves, pumps, and pistons to control the flow of the fluid and generate pressure.

• The pressure created by the mech...read more
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Q2. What is the method of forging
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Forging is a manufacturing process involving the shaping of metal using localized compressive forces.
• Heating the metal to a high temperature to make it more malleable

• Applying compressive forces to shape the metal into the desired form

• Cooling the forged metal to strengthen it

• Types of forging include open-die forging, closed-die forging, and seamless rolled ring forging
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Q1. What is your work in previous company
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Q2. HT related questions
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Q1. Basic introduction
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Q1. 1.type and diffrance of encoders 2.MTBF&MTTR 3.Communication protocol plc
Ans. 
Encoders can be incremental or absolute, MTBF is Mean Time Between Failures, MTTR is Mean Time To Repair, common communication protocols for PLCs include Modbus and Profibus.
• Encoders can be incremental (provide relative position) or absolute (provide exact position)

• MTBF is the average time between failures of a system or component

• MTTR is the average time it takes to repair a failed system or component

• Common communicati...read more
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Q2. 4.Servo drive 5.vfd drive
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Plc programming test