Jai Balaji Group Electrical Engineer Interview Questions and Answers

Q1. Electrical machine all
Ans. 
All machine are maintenance and connection and operated.
All starter are maintenance 
All machine are repair.
Answered by prasnnajit pradhan
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Q1. Type of transformer parts.
Ans. 
Transformer parts include core, windings, insulation, tap changer, and cooling system.
• Core: magnetic material that provides a path for the magnetic flux

• Windings: conductors that carry the electrical current

• Insulation: material that separates the windings and core to prevent short circuits

• Tap changer: device that adjusts the number of turns in the windings to regulate voltage

• Cooling system: dissipates heat generated by ...read more
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Q2. Bhugol relay working Prasidure.
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Q3. Transformer name plate detals.
Ans. 
Transformer nameplate details include manufacturer, model, kVA rating, voltage rating, frequency, and serial number.
• Manufacturer name

• Model number

• kVA rating

• Voltage rating

• Frequency

• Serial number
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Q4. Lt Motor minimum insulation resistance value.
Ans. 
The minimum insulation resistance value for a Lt Motor.
• The minimum insulation resistance value for a Lt Motor is typically 1 Megaohm.

• This value is important to ensure the motor is properly insulated and protected from electrical faults.

• Insulation resistance can be measured using a megohmmeter.

• Factors that can affect insulation resistance include temperature, humidity, and contamination.

• Regular testing of insulation res...read more
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Q5. HT motor minimum insulation resistance value.
Ans. 
Minimum insulation resistance value for HT motor.
• HT motor insulation resistance should be at least 1 Mega Ohm

• Insulation resistance should be measured regularly to ensure safety

• Factors like temperature and humidity can affect insulation resistance
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Q6. HT Cable HV test detals.
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Electrical related questions. And genaral electrical engineer questions

All about technical interview and ask only your fields related questions.

Q1. Asking about your family and discussion about salary
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Q2. Why are you joining this company
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Q1. What is plc. Draw structure diagram.
Ans. 
PLC stands for Programmable Logic Controller, used in industrial automation to control machinery and processes.
• PLC is a digital computer used for automation of electromechanical processes.

• It uses a programmable memory to store instructions and specific functions.

• PLCs are commonly used in manufacturing plants, assembly lines, and other industrial settings.

• They can be programmed using ladder logic, function block diagram...read more
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Q2. What are different types of communication cable used in your industry.
Ans. 
Different types of communication cables used in the electrical engineering industry include coaxial cables, twisted pair cables, and fiber optic cables.
• Coaxial cables: used for high-frequency transmission and commonly used in cable television and computer networks.

• Twisted pair cables: consists of pairs of insulated copper wires twisted together to reduce electromagnetic interference, commonly used in Ethernet networks.

• ...read more
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Q3. Difference between single mode and multimode fiber optic cable.
Ans. 
Single mode fiber optic cable has a smaller core size and allows only one mode of light to propagate, while multimode fiber optic cable has a larger core size and allows multiple modes of light to propagate.
• Single mode fiber optic cable has a core size of 8-10 microns, while multimode fiber optic cable has a core size of 50-62.5 microns.

• Single mode fiber optic cable provides higher bandwidth and longer transmission dis...read more
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Q4. Types of transformer
Ans. 
Types of transformers include step-up, step-down, isolation, autotransformer, and distribution transformers.
• Step-up transformer increases voltage output

• Step-down transformer decreases voltage output

• Isolation transformer provides electrical isolation between primary and secondary windings

• Autotransformer has a single winding with multiple taps for different voltage levels

• Distribution transformer is used to distribute pow
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Q5. Protection system used for transformer
Ans. 
Protection system for transformers includes Buchholz relay, differential protection, overcurrent protection, and temperature monitoring.
• Buchholz relay detects internal faults like gas accumulation or oil leakage

• Differential protection compares currents entering and leaving the transformer to detect faults

• Overcurrent protection safeguards against excessive current flow

• Temperature monitoring ensures the transformer opera
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Q6. Maintenance of Transformer and motor
Ans. 
Regular maintenance of transformers and motors is crucial for ensuring optimal performance and preventing breakdowns.
• Regularly inspecting for signs of wear and tear

• Checking and replacing worn out parts such as brushes and bearings

• Testing insulation resistance

• Cleaning and lubricating moving parts

• Monitoring temperature and vibration levels

• Following manufacturer's maintenance guidelines

• Keeping records of maintenance activ
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Q7. Differential protection of transformer
Ans. 
Differential protection of transformer ensures that any internal fault is quickly detected and isolated to prevent damage.
• Differential protection compares the current entering and leaving the transformer windings. If there is a difference, it indicates a fault.

• The relay used for differential protection operates when the difference in current exceeds a set threshold.

• This protection scheme is effective in detecting inter...read more
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Q8. Ten delta test of transformer
Ans. 
Ten delta test is a method used to determine the phase relationship between the primary and secondary windings of a transformer.
• Ten delta test involves injecting a low voltage signal into the primary winding and measuring the corresponding output in the secondary winding.

• The test helps in identifying any phase shift or angular displacement between the primary and secondary windings.

• It is important for ensuring the prop...read more
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Q1. Electrical Engineer
Ans. Electrical Engineering line up on Fresher
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Q2. Any questions For Bengala hindi & English
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Q3. Tally solution programming
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Q4. Hindi Bengal English
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Q5. Any question Electrical machine
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Q1. Only electrical technology
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Q2. Electrical electrical problem
Ans. 
The question is about solving an electrical problem.
• Identify the specific electrical problem being described

• Analyze the circuit or system to determine the root cause of the issue

• Propose potential solutions or troubleshooting steps to resolve the problem
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Q1. Only electrical power plant
Ans. Electrical problem solved only few times.Always copurat for my all'electrical members, Thanks 🙏🙏
Answered by Prasanta kumar Parida
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Problem solved on Electrical Equipment

Q1. PLC and logics,ios
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Q2. Ht,lt motor , protection and breakers
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