Jai Balaji Group Mechanical Engineer Interview Questions and Answers

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Q1. Question about what you studied technical branch that will ask
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Q2. Round 3 HR Personal information, occupation of father and mother
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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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Q1. Electrical department
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Q2. What is MCC PCC PANEL
Ans. 
MCC stands for Motor Control Center and PCC stands for Power Control Center. They are electrical panels used to control and distribute power to motors and other electrical equipment.
• MCC panels are used to control and distribute power to motors in industrial settings.

• PCC panels are used to control and distribute power to various electrical equipment.

• Both panels play a crucial role in ensuring efficient and safe operatio...read more
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Q1. Electrical basis questions. As that ckt. diagrams of motor satr and delta connection control & power supply.
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Q2. Motor megger value & cable size as per rating of motor.
Ans. 
Motor megger value should be at least twice the rated voltage of the motor. Cable size should be selected based on the full load current of the motor.
• Motor megger value should be at least 2 times the rated voltage of the motor to ensure insulation integrity.

• Cable size should be selected based on the full load current of the motor to prevent overheating and voltage drop.

• For example, for a motor rated at 400V, the megger...read more
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Q3. OLR value of motor as per rating of motor & MPCB rating.
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OLR value of a motor is determined by the rating of the motor and the MPCB rating.
• OLR value is the Overload Relay value, which is used to protect the motor from overload conditions.

• The OLR value is typically set based on the rating of the motor and the rating of the Motor Protection Circuit Breaker (MPCB).

• For example, if a motor has a rating of 5 HP and the MPCB rating is 10A, the OLR value would be calculated accordin
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