L&T Heavy Engineering Electrical Maintenance Engineer Interview Questions and Answers

Q1. What is electric current, how will be work MCB,how many types of short skt
Ans. 
Electric current is the flow of electric charge. MCB is a safety device that automatically switches off the electrical circuit. There are different types of short circuits.
• Electric current is the movement of electrons through a conductor.

• MCB stands for Miniature Circuit Breaker and is used to protect electrical circuits from damage caused by overload or short circuit.

• Short circuits occur when there is an unintended con...read more
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Q2. What is ckt ,what is current,what is resistant, what is voltage
Ans. 
CKT is circuit, current is flow of electrons, resistance is opposition to flow, voltage is electrical potential difference.
• CKT stands for circuit which is a closed loop through which electricity flows

• Current is the flow of electrons in a circuit and is measured in amperes (A)

• Resistance is the opposition to the flow of current and is measured in ohms (Ω)

• Voltage is the electrical potential difference between two points i...read more
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Q3. What is power , why use relay in electric current
Ans. 
Power is the rate at which energy is transferred. Relays are used to control high power circuits with low power signals.
• Power is measured in watts and is the product of voltage and current

• Relays are used to isolate high power circuits from low power control circuits

• Relays can also be used to switch multiple circuits with a single control signal

• Examples of relay applications include motor control, lighting control, and
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What your Aim...I Given Answer that my Aim is Growth in my life with work hard....

Q1. What is the SF⁶ Breaker ? SF⁶ breaker is sulfur HexaFluoride Gas breaker..
Ans. 
SF⁶ breaker is a type of circuit breaker that uses sulfur hexafluoride gas as the medium for extinguishing the arc.
• SF⁶ breaker is commonly used in high-voltage electrical systems.

• It is known for its excellent insulating properties and high dielectric strength.

• The sulfur hexafluoride gas in the breaker acts as an effective cooling and arc-quenching medium.

• SF⁶ breaker is often used in power transmission and distribution ...read more
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Q2. How many types of motor? Ans: Motor 2 types.Ac motor&Dc motor..
Ans. 
There are two types of motors: AC motors and DC motors.
• AC motors are powered by alternating current and are commonly used in household appliances and industrial machinery.

• DC motors are powered by direct current and are often found in battery-operated devices and electric vehicles.
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Q3. How many types of Electricity ? Electricity 2 types 1:statics&2:Dynamic..
Ans. 
There are two types of electricity: static electricity and dynamic electricity.
• Static electricity is the buildup of electric charge on an object without any flow of electric current.

• Dynamic electricity is the flow of electric charge through a conductor.

• Examples of static electricity include rubbing a balloon on hair and getting shocked by touching a doorknob.

• Examples of dynamic electricity include the electricity flowi...read more
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Q4. How much volt in Ht line ? Ans:11kv ,25kv,33kv,66kv,132kv,220kv,400kv,500kv
Ans. 
The voltage in HT lines can vary depending on the application, but common voltages include 11kV, 25kV, 33kV, 66kV, 132kV, 220kV, 400kV, and 500kV.
• HT lines typically carry higher voltages than low-tension lines.

• The voltage in HT lines is used for transmitting electricity over long distances.

• Higher voltage levels in HT lines reduce power losses during transmission.

• Examples of HT lines include transmission lines for power
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Q5. What is the CT? Ans: CT is a Current Transformer...it is measure flow of current.
Ans. 
A CT is a Current Transformer used to measure the flow of current.
• CT stands for Current Transformer.

• It is a device used to step down high currents to a safe level for measurement or protection purposes.

• CTs are commonly used in electrical power systems to monitor and control current flow.

• They consist of a primary winding and a secondary winding, where the primary winding is connected in series with the current being mea...read more
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Q1. What is the teransform
Ans. 
A transformer is a device that transfers electrical energy between two or more circuits through electromagnetic induction.
• Transformers are commonly used to step up or step down voltage levels in electrical systems.

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

• The primary coil is connected to the input voltage source, while the secondary coil is connected to the outpu...read more
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Q2. What is the current
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Q3. What is the voltage
Ans. 
Voltage is the difference in electric potential between two points.
• Voltage is measured in volts (V).

• It represents the potential energy per unit charge.

• Voltage is the driving force that pushes electric current through a circuit.
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Q4. What is the ohm's low
Ans. 
Ohm's Law states that the current flowing through a conductor is directly proportional to the voltage applied across it, and inversely proportional to the resistance of the conductor.
• Ohm's Law is represented by the formula V = IR, where V is the voltage, I is the current, and R is the resistance.

• It helps in calculating the current flowing through a circuit when the voltage and resistance are known, or determining the r...read more
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Q1. If any electrical issue how to resolve.
Ans. 
To resolve an electrical issue, identify the problem, troubleshoot, and implement appropriate solutions.
• Identify the specific electrical issue

• Inspect the affected equipment or circuit

• Check for loose connections or damaged components

• Use appropriate testing equipment to diagnose the problem

• Troubleshoot by following electrical diagrams or manuals

• Implement necessary repairs or replacements

• Ensure proper safety measures are ...read more
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Q1. A 22 kw AOP motor CT cable burn again and again what is the reason ?
Ans. 
The repeated burning of a 22 kW AOP motor CT cable may be due to overloading, short circuits, poor insulation, or incorrect cable sizing.
• Check for overloading of the motor causing excessive heat in the cable

• Inspect for short circuits in the motor or the wiring

• Ensure proper insulation of the cable to prevent overheating

• Verify if the cable size is appropriate for the motor's power requirements
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Q2. When CT of AOP motor is bypassed then what effect on the motor ?
Ans. 
Bypassing the CT of an AOP motor can lead to overcurrent and damage to the motor.
• Bypassing the CT can result in the motor drawing excessive current.

• This can lead to overheating of the motor windings.

• Overcurrent can cause damage to the motor components.

• It can also pose a safety risk due to potential electrical faults.
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Q1. Abhi tak ni hua hai.date fix kare
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Q2. Interview date fix kare .
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Q3. Electrical engineering se
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Q4. Maintenance ke liye Krna hai
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Q5. Good job and good work
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Q6. Kese work krna hai L&t company m
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Q7. Me achhe se achha response dunga
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Q8. What is current. what is voltage
Ans. 
Current is the flow of electric charge, while voltage is the measure of electric potential difference.
• Current is measured in amperes (A) and is the rate of flow of electric charge.

• Voltage is measured in volts (V) and is the measure of electric potential difference.

• Ohm's law relates current, voltage, and resistance: I = V/R.

• Current flows from high potential to low potential, while voltage is the difference in potential ...read more
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Q9. Ac and dc difference ?
Ans. 
AC and DC are two types of electrical current. AC changes direction periodically while DC flows in one direction only.
• AC stands for Alternating Current while DC stands for Direct Current

• AC changes direction periodically while DC flows in one direction only

• AC is used for power transmission over long distances while DC is used for electronic devices

• AC voltage can be easily changed using a transformer while DC voltage can...read more
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Q10. Ok best of luck .thank you
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Not good for future.

Q1. About previous company
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Q2. Experience discussion
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