Jai Balaji Group Electrical Engineer Interview Questions and Answers

Q1. Which type of protection used in a substation
Ans. 
Different types of protection are used in a substation to ensure safety and reliability.
• Overcurrent protection: Protects against excessive current flow.

• Overvoltage protection: Safeguards against high voltage surges.

• Differential protection: Detects faults by comparing currents entering and leaving the substation.

• Distance protection: Protects transmission lines based on the distance to the fault.

• Ground fault protection: ...read more
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Q2. Which type of ht breaker used in ht line
Ans. 
Different types of HT breakers are used in HT lines depending on the specific requirements.
• Air Circuit Breaker (ACB) is commonly used in HT lines for its high breaking capacity and quick response time.

• Vacuum Circuit Breaker (VCB) is another popular choice due to its compact size and low maintenance requirements.

• SF6 Circuit Breaker is used for high voltage applications as it provides excellent arc quenching properties.

• O...read more
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Q1. (1) tell your self, (2) Passt company work, (3) what is VFD and it's diagram, (4) Electrical maintenance related questions
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Q2. Motor related questions
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Q3. MCC and PCC panel
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Q1. (1) Salary discussion, (2) Experience related questions
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Electrical & technical qustion

Q1. DOL &Star delta starter ckt daigram
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Q2. Drives & motor working
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Q3. Porsanal skills
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Q1. What is alternater
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Q2. What is transformer
Ans. 
Transformer is a static device is change is ac voltage one level and another level but no change in frequency the work in mutual induction method.
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Q3. What is rotor types syuchronus machine
Ans. 
Sailent type rotor and cylinder type rotor of uses in syuchronus machine.
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Q1. What is synonyms machine
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Q2. What is induction Machine
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Q1. Genarator protection
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Q2. Transformer protection
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Q3. What is induction motor
Ans. 
An induction motor is a type of AC motor where power is supplied to the rotor by electromagnetic induction.
• Induction motors are commonly used in various applications such as industrial machinery, pumps, fans, and compressors.

• They do not require brushes to transfer power to the rotor, making them more reliable and maintenance-free compared to brushed DC motors.

• The speed of an induction motor is determined by the frequen...read more
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Q4. Work principle transformer
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Q5. What is dc series motor
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A DC series motor is a type of DC motor where the field winding is connected in series with the armature winding.
• Field winding and armature winding are connected in series

• High starting torque but low speed

• Used in applications where high starting torque is required, such as in traction applications
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Q6. Grid to TG sync process
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