Larsen & Toubro Limited Electrical Shift Engineer Interview Questions and Answers

Q1. Self introduction
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Q2. Previous experience and languages
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Q1. What about synchronous motor principal
Ans. 
Synchronous motors operate at a constant speed determined by the frequency of the power source.
• Synchronous motors have a rotor that rotates at the same speed as the rotating magnetic field in the stator.

• They are used in applications where constant speed is required, such as in industrial processes or power generation.

• Synchronous motors are more efficient than induction motors at higher loads.

• They require a separate DC ...read more
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Q2. Difference between induction and synchronous motor
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Induction motors rely on induction to produce torque, while synchronous motors require a magnetic field to rotate at a constant speed.
• Induction motors do not require any external connections to the rotor, while synchronous motors need a DC power source to create the magnetic field.

• Induction motors are self-starting, while synchronous motors require external means to start.

• Induction motors are more commonly used in indu...read more
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Q1. Electrical any quacthine contraction
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Q2. Electrical power tools
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Q3. Peamament job your company
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Q1. Self introduction & previous company experience
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Q1. As per company policy requirement condition
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Q1. As per company policy requirement
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Q1. All type contractors in use electrical panel
Ans. 
Electrical panels can be used by various types of contractors.
• Electrical contractors are the most common type of contractors who use electrical panels.

• General contractors may also use electrical panels for specific projects.

• HVAC contractors may require electrical panels for their heating and cooling systems.

• Plumbing contractors may need electrical panels for water heaters or pumps.

• Fire protection contractors may use el...read more
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Q2. All type MCB in use panel
Ans. 
Various types of MCBs are used in the panel.
• Type B MCB for general purpose circuits

• Type C MCB for circuits with inductive loads

• Type D MCB for circuits with high inrush currents

• Type K MCB for circuits with high inrush currents and motors

• Type Z MCB for circuits with DC components

• Type F MCB for circuits with sensitive equipment

• Type G MCB for circuits with surge protection

• Type L MCB for lighting circuits
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Q3. Difference in AC and DC current
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AC current changes direction periodically while DC current flows in one direction only.
• AC current is used in household appliances while DC current is used in batteries and electronic devices.

• AC current can be easily transformed into different voltages using a transformer while DC current cannot.

• AC current is more dangerous to humans than DC current because it can cause muscle contractions.

• DC current is more efficient f...read more
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Q4. Definition of voltage
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Voltage is the measure of electric potential difference between two points in a circuit.
• Voltage is measured in volts (V).

• It is the force that drives electric current through a circuit.

• Voltage can be positive or negative depending on the direction of the current flow.

• A battery provides a voltage difference between its terminals to power a circuit.

• Voltage drop occurs when there is a decrease in voltage along a circuit du
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Q1. How many find the fault
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The question is unclear. Please provide more context.
• Please provide more information about the fault.

• Are you asking about fault-finding techniques or the number of people required to find a fault?

• Without more context, it is difficult to provide a specific answer.
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Q2. What is this Transformer safety parts
Ans. 
Transformer safety parts include fuses, circuit breakers, and grounding systems.
• Fuses protect against overcurrent and short circuits.

• Circuit breakers protect against overloads and faults.

• Grounding systems prevent electrical shock and protect equipment.

• Other safety parts may include temperature sensors and pressure relief devices.
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Q3. Why use capacitor in working
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Capacitors are used to store and release electrical energy in circuits.
• Capacitors can filter out noise and stabilize voltage in power supplies.

• They can also be used in timing circuits and oscillators.

• Capacitors are commonly used in audio equipment to filter out unwanted frequencies.

• They can also be used in electric motors to improve power factor and efficiency.

• Capacitors are essential components in electronic devices a
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Q4. What Is the sunt relay and use
Ans. 
A sun t relay is a type of time-delay relay used in electrical systems.
• It is used to control the operation of a circuit based on a time delay.

• It is commonly used in lighting systems to delay turning on or off.

• It can also be used in motor control circuits to prevent damage from sudden power surges.

• The delay time can be adjusted to suit the specific needs of the circuit.

• It works by using a small current to charge a capac...read more
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Q1. Many major under voltage
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Under voltage can cause major electrical problems.
• Under voltage can cause equipment damage and failure.

• It can also lead to power outages and disruptions.

• Proper monitoring and maintenance can prevent under voltage issues.

• Examples of under voltage problems include brownouts and voltage sags.
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Q1. Chiller plant safety???
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Q1. Why you want to join us??
Ans. 
I am passionate about electrical engineering and I believe joining your company will provide me with the opportunity to work on challenging projects and contribute to technological advancements.
• I have always been fascinated by the field of electrical engineering and have a strong passion for it.

• I have a solid educational background and relevant experience in electrical engineering.

• I have researched and learned about yo...read more
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I am ready for interview

Q1. I am ready for interview
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Q2. All question answer accepted interview
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Q3. Expected all questions
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Q4. Interested this company
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