L&T Construction Assistant Electrical Engineering Manager Interview Questions and Answers

General knowlegde, Basic Aptitude, Domain Technical MCQ

Genx vs Genz, Altitude and comparsion

Q1. Components of Transformer
Ans. 
Components of a transformer include core, windings, and insulation.
• Core: Provides a path for magnetic flux

• Windings: Primary and secondary coils for inducing voltage

• Insulation: Prevents short circuits and ensures safety
Answered by AI
Add your answer
Q2. Question based on series and parallel resistance
Add your answer

Good learning and Teaching and growing

Good base knowledge and experience

Good base background and growth and knowledgeable

Normal introduction and interview

Q1. Type of electrical motor
Ans. 
There are various types of electrical motors including AC motors, DC motors, synchronous motors, and induction motors.
• AC motors: commonly used in household appliances and industrial applications

• DC motors: used in applications where speed control is important, such as in electric vehicles

• Synchronous motors: used in applications where precise speed control is required, such as in clocks and timers

• Induction motors: widely...read more
Answered by AI
Add your answer
Q2. 3 phase induction motor starter
Add your answer
Q3. Protection of transformer
Ans. 
Protection of transformer involves measures to prevent damage from overcurrent, overvoltage, and overheating.
• Use overcurrent protection devices such as fuses and circuit breakers to prevent damage from excessive current flow.

• Install overvoltage protection devices like surge arresters to safeguard against voltage spikes.

• Implement temperature monitoring systems to prevent overheating, such as thermal sensors and cooling ...read more
Answered by AI
Add your answer
Q4. ACB VCB maintenance
Add your answer
Q5. Star delta connection
Add your answer

Q1. Why do you want to do job?
Add your answer
Q2. Why have you joined Electronics?
Add your answer
Q3. What is Ohm's law?
Ans. 
Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points.
• Ohm's law is represented by the equation I = V/R, where I is the current, V is the voltage, and R is the resistance.

• It is named after Georg Simon Ohm, a German physicist who first formulated this law.

• This law is applicable to all types of circuits, including DC and AC circuits.

• It is use...read more
Answered by AI
Add your answer

Q1. What is Full form DOL starter
Ans. 
DOL starter stands for Direct-On-Line starter, used to start motors by directly connecting them to the power supply.
• DOL starter is the simplest and most common type of motor starter.

• It directly connects the motor to the power supply without any intermediate starting method.

• It provides full voltage to the motor during starting, which can cause high inrush current.

• DOL starters are suitable for small to medium-sized motor...read more
Answered by AI
View 1 more answer
Q2. What is APFC PANEL
Ans. 
APFC PANEL stands for Automatic Power Factor Correction Panel, used to maintain power factor in electrical systems.
• APFC PANEL automatically monitors and corrects the power factor of electrical systems.

• It helps in reducing electricity bills by maintaining a high power factor.

• APFC PANELs are commonly used in industries and commercial buildings.

• They consist of capacitors that are switched on and off based on the load requ...read more
Answered by AI
Add your answer
Q3. Star dalta conection
Add your answer

Q1. What is CT and PT
Ans. 
CT stands for Current Transformer and PT stands for Potential Transformer. They are used in electrical systems for measurement and protection purposes.
• CT is used to measure current in high voltage circuits by stepping down the current to a safe level for measurement.

• PT is used to measure voltage in high voltage circuits by stepping down the voltage to a safe level for measurement.

• Both CT and PT are essential components...read more
Answered by AI
Add your answer
Q2. What is DTC structure
Ans. 
DTC structure stands for Direct Torque Control structure, a control method used in AC motor drives for precise torque and speed control.
• DTC structure is a control technique used in AC motor drives to directly control torque and flux without the need for a separate speed controller.

• It is based on the principle of controlling the torque and flux by selecting the appropriate voltage vectors in the motor.

• DTC structure offe...read more
Answered by AI
Add your answer
Q3. Use of LA, AB switch
Ans. 
LA, AB switch is used in electrical engineering to switch between two different signal sources or destinations.
• LA, AB switch is commonly used in audio and video equipment to switch between different inputs or outputs.

• It allows for easy switching between two different signal sources or destinations without having to physically disconnect and reconnect cables.

• The switch typically has two positions - one for each signal s...read more
Answered by AI
Add your answer

Q1. What are the major parts in power transformer?
Ans. 
The major parts in a power transformer include the core, windings, insulation, cooling system, and tap changer.
• Core: Provides a path for magnetic flux and is usually made of laminated steel sheets.

• Windings: Consist of primary and secondary coils that transfer electrical energy.

• Insulation: Prevents electrical leakage and ensures safety.

• Cooling System: Keeps the transformer within operating temperature limits, commonly u...read more
Answered by AI
Add your answer

Q1. What do you want to switch ?
Ans. 
I want to switch electrical circuits and devices.
• Switching electrical circuits to control the flow of electricity.

• Switching electrical devices on or off.

• Switching between different power sources.

• Switching between different modes or settings of electrical equipment.

• Switching between different electrical connections or configurations.
Answered by AI
Add your answer