10+ Lamron Interview Questions and Answers

Basic parameters in designing a Transformer include voltage rating, current rating, power rating, efficiency, and cooling system.

• Voltage rating determines the maximum voltage the transformer can handle.

• Current rating specifies the maximum current that can flow through the transformer.

• Power rating indicates the maximum power the transformer can handle without overheating.

• Efficiency is crucial for minimizing energy losses during power conversion.

• Cooling system design is importa...read more

There are two types of transformers - step-up and step-down transformers.

• Step-up transformers increase voltage while decreasing current.

• Step-down transformers decrease voltage while increasing current.

• Transformers are used to transfer electrical energy from one circuit to another.

• They are commonly used in power distribution systems.

• Examples of transformers include distribution transformers, power transformers, and isolation transformers.

Induction motor works on the principle of electromagnetic induction to convert electrical energy into mechanical energy.

• Induction motor has a stator and a rotor

• The stator has a set of windings that are connected to an AC power source

• The AC current in the stator windings creates a rotating magnetic field

• The rotor is made up of conductive bars that are short-circuited at both ends

• The rotating magnetic field induces a current in the rotor bars, which in turn creates a magnetic f...read more

My goal in my career is to continuously learn and grow, while making a positive impact in my role as an Assistant Officer.

• Continuously learn and develop new skills

• Take on challenging projects and responsibilities

• Make a positive impact in my role

• Contribute to the success of the organization

• Build strong relationships with colleagues and superiors

Coulomb's Law states that the force between two charged objects is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.

• The formula for Coulomb's Law is F = k * (q1 * q2) / r^2, where F is the force between the charges, q1 and q2 are the magnitudes of the charges, r is the distance between the charges, and k is the Coulomb constant.

• The force can be attractive or repulsive depending on the signs of the char...read more

REF differential protection compares the currents at both ends of the protected zone, while Bias differential protection uses a bias current to detect faults.

• REF differential protection compares the currents at both ends of the protected zone to detect faults.

• Bias differential protection uses a bias current in addition to the main current to detect faults.

• REF protection is more sensitive to through faults, while Bias protection is more stable during external faults.

• Example: R...read more

Transformers are electrical devices that transfer energy between two or more circuits through electromagnetic induction.

• Transformers are used to increase or decrease the voltage of an alternating current (AC) power supply.

• They consist of two coils of wire, called the primary and secondary coils, wrapped around a magnetic core.

• When an AC current flows through the primary coil, it creates a magnetic field that induces a voltage in the secondary coil.

• Transformers are used in pow...read more

PT measures voltage while CT measures current in electrical systems.

• PT stands for Potential Transformer and measures voltage in electrical systems.

• CT stands for Current Transformer and measures current in electrical systems.

• PT is used to step down high voltage to a safe level for measurement or protection purposes.

• CT is used to step down high current to a safe level for measurement or protection purposes.

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 is connected to a source of alternating current

• Alternating current in primary coil creates a changing magnetic field in the core

• This changing magnetic field induces a voltage in the secondary coil

• Voltage in secondary coil can be higher or lower than the volt...read more

Transformer losses include copper losses and iron losses.

• Copper losses are caused by the resistance of the copper windings and are also known as I^2R losses.

• Iron losses are caused by hysteresis and eddy currents in the core material.

• Other losses include stray losses and dielectric losses.

• Total losses in a transformer are the sum of copper losses and iron losses.

Power distribution sequence refers to the order in which electricity is transmitted from power plants to end users.

• Power is generated at power plants

• Electricity is transmitted through high voltage transmission lines

• Transformers step down the voltage for distribution to homes and businesses

• Electricity reaches end users through distribution lines

• Power distribution sequence ensures reliable and efficient supply of electricity

Power triangle is a graphical representation of the relationship between real power, reactive power, and apparent power in an electrical system.

• Power triangle helps in understanding the balance between real, reactive, and apparent power in an electrical circuit.

• Real power is the actual power consumed by the circuit and is represented by the horizontal side of the triangle.

• Reactive power is the power that oscillates between the source and load due to inductive or capacitive el...read more

PDCA is a continuous improvement model used in project management.

• PDCA stands for Plan, Do, Check, Act.

• It is also known as the Deming Cycle or Shewhart Cycle.

• It is used to improve processes and products.

• Plan: Define the problem, collect data, and develop a plan.

• Do: Implement the plan on a small scale.

• Check: Evaluate the results and analyze the data.

• Act: Make changes based on the analysis and implement the revised plan.

• Example: A software development team uses PDCA to improve ...read more

DOL starter stands for Direct Online starter, which is a type of motor starter used to start and stop motors directly without any soft starting or stopping mechanism.

• DOL starter is the simplest and most economical method of starting a motor.

• It directly connects the motor to the power supply at full voltage during starting.

• It is suitable for small to medium-sized motors where the starting current is not a concern.

• DOL starters are commonly used in applications like pumps, fans,...read more

Motors are devices that convert electrical energy into mechanical energy to produce motion.

• Motors are commonly used in various applications such as industrial machinery, household appliances, and vehicles.

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

• Motors work based on the principle of electromagnetic induction, where a magnetic field interacts with current to generate force.

• Examples of motors include electric fans, washing machine m...read more