Mahindra & Mahindra Electrical Maintenance Team Lead Interview Questions and Answers

A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.

• Consists of two coils of wire (primary and secondary) wrapped around a core

• Primary coil receives electrical energy and creates a magnetic field

• Magnetic field induces a voltage in the secondary coil, transferring energy

• Used to step up or step down voltage levels in power distribution syst

Parts of a transformer include core, windings, insulation, and terminals.

• Core: Provides a path for magnetic flux

• Windings: Primary and secondary coils for inducing voltage

• Insulation: Prevents short circuits between windings

• Terminals: Connect the transformer to external circuits

A conserved tank is a storage tank used to hold a specific quantity of liquid, typically for industrial or agricultural purposes.

• Conserved tanks are commonly used in industries such as oil and gas, chemical processing, and water treatment.

• These tanks are designed to safely store liquids and prevent leaks or spills.

• Conserved tanks may have features such as double walls, leak detection systems, and corrosion-resistant ma...read more

Permit work procedure is a set of guidelines and steps that must be followed before starting any maintenance work on electrical systems.

• Obtain necessary permits before starting any maintenance work

• Identify potential hazards and implement safety measures

• Communicate with relevant stakeholders about the work being done

• Ensure all equipment is properly de-energized before starting work

• Follow lockout/tagout procedures to pre

A toolbox meeting is a short daily safety meeting held at the beginning of a work shift to discuss potential hazards, safety procedures, and goals for the day.

• Toolbox meetings are typically held at the start of each workday to ensure all workers are aware of safety protocols and goals.

• Topics discussed in toolbox meetings may include recent incidents, near misses, safety reminders, and specific tasks for the day.

• These m...read more

I am a dedicated and hardworking Diploma Electrical Engineer with a passion for problem-solving and a strong technical background.

• Graduated with a Diploma in Electrical Engineering

• Experienced in designing electrical systems and troubleshooting

• Proficient in using CAD software for drafting schematics

• Strong knowledge of electrical codes and regulations

• Excellent communication and teamwork skills

I have always been fascinated by the way electricity powers our world and the opportunity to work on innovative projects in the field of electrical engineering.

• Passion for understanding how electricity works and its applications

• Desire to work on cutting-edge technology and innovative projects

• Interest in problem-solving and finding efficient solutions

• Inspiration from successful electrical engineers and their contributio

My strengths include strong problem-solving skills, attention to detail, and ability to work well in a team.

• Strong problem-solving skills

• Attention to detail

• Ability to work well in a team

Working with relays requires proper safety measures to prevent electrical hazards.

• Ensure power is off before working on relays

• Use appropriate personal protective equipment (PPE)

• Follow lockout/tagout procedures

• Regularly inspect and maintain relays

• Train employees on proper safety procedures

• Examples of PPE include insulated gloves, safety glasses, and flame-resistant clothing

PLC stands for Programmable Logic Controller and is a digital computer used for automation of electromechanical processes.

• PLCs are used to control and automate various industrial processes such as assembly lines, robotic devices, and packaging systems.

• They are programmed using ladder logic or other programming languages to execute specific tasks.

• PLCs can monitor inputs from sensors and other devices, and based on the p...read more

Home's law is a principle that states that the current flowing through a conductor is directly proportional to the voltage applied across it.

• Home's law is also known as Ohm's law.

• It is expressed as I = V/R, where I is the current, V is the voltage, and R is the resistance.

• This law is fundamental to the study of electrical circuits and is used to calculate the behavior of circuits.

• For example, if the voltage across a re...read more

The current unit is the ampere (A), which measures the flow of electric charge.

• The unit of electric current is the ampere (A).

• Current is the rate of flow of electric charge.

• It is measured using an ammeter.

• One ampere is equal to one coulomb of charge passing through a point in one second.

Voltage is the unit of measurement for electric potential difference.

• Voltage is the force that pushes electric charges through a circuit.

• It is measured in volts (V).

• Voltage is essential for the operation of electrical devices.

• Examples of voltage units include millivolts (mV), kilovolts (kV), and megavolts (MV).

Ohm's law states that the current flowing through a conductor is directly proportional to the voltage applied across it.

• Ohm's law is expressed as V = I * R, where V is the voltage, I is the current, and R is the resistance.

• The current symbol is represented by the letter 'I'.

• Ohm's law is fundamental in understanding and analyzing electrical circuits.

• Example: If a circuit has a voltage of 12 volts and a resistance of 4 o...read more

The two types of winding in electrical engineering are lap winding and wave winding.

• Lap winding is used in DC machines and is characterized by multiple parallel paths for current flow.

• Wave winding is used in AC machines and is characterized by a single path for current flow.

• Lap winding provides high current capacity and low voltage output, while wave winding provides low current capacity and high voltage output.

• In lap ...read more

The primary winding is the first coil in a transformer that receives electrical energy.

• The primary winding is typically connected to the power source.

• It is responsible for receiving and transmitting electrical energy to the secondary winding.

• The number of turns in the primary winding determines the voltage ratio between the primary and secondary sides.

• Primary windings are commonly found in transformers, induction motor