Addverb Technologies Interview Questions, Process, and Tips

Q1. How do 72 slot 50 hp motor riwinding
Ans. 
Rewinding a 72 slot 50 hp motor involves disassembling the motor, removing the old windings, and replacing them with new windings.
• Disassemble the motor carefully to access the windings

• Remove the old windings without damaging the core

• Calculate the number of turns and wire gauge needed for the new windings

• Wind the new coils carefully and evenly in the slots

• Connect the windings properly and test the motor for functionalit
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Q2. How do no nc ful form and connection
Ans. 
NO NC stands for Normally Open and Normally Closed. They refer to the state of a switch or relay when it is not activated.
• NO (Normally Open) - the switch is open (off) when not activated

• NC (Normally Closed) - the switch is closed (on) when not activated

• Used in electrical circuits to control the flow of current

• Commonly used in control panels, automation systems, and safety circuits
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Q3. How do earthing point cheack
Ans. 
Earthing points are checked by using a multimeter to measure the resistance between the earthing point and the earth electrode.
• Use a multimeter set to the resistance mode

• Connect one probe to the earthing point and the other probe to the earth electrode

• Check the resistance reading on the multimeter

• A low resistance reading indicates a good earthing connection

• Repeat the process for all earthing points in the system
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Q1. How do fan rewinding
Ans. 
Fan rewinding is the process of replacing the copper wire coils in the stator of a fan motor to restore its functionality.
• Disconnect the fan from the power source before starting the rewinding process.

• Remove the fan blades and outer casing to access the stator.

• Carefully unwind the old copper wire coils from the stator and measure their length and gauge.

• Select the appropriate gauge and length of copper wire for rewindin...read more
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Q1. What is working for contactor realay
Ans. 
A contactor relay is an electrical device used to control a high-power circuit with a low-power signal.
• Contactor relay consists of a coil, contacts, and an enclosure.

• When the coil is energized, it creates a magnetic field that pulls the contacts together to close the circuit.

• Contactor relays are commonly used in motor control circuits to start and stop motors.

• They can also be used in lighting control, heating systems,
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Q2. Question required as per H
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Q1. Difference between Star and delta ?
Ans. 
Star and delta are two different methods of connecting electrical motors.
• Star connection is used for motors that require high starting torque and low starting current.

• Delta connection is used for motors that require high running torque and high starting current.

• In star connection, the motor windings are connected in a triangular shape, while in delta connection, the windings are connected in a star shape.

• Star connectio...read more
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Q2. What is bukhoj relay?
Ans. 
Bukhoj relay is an electrical component used in robotic production systems.
• Bukhoj relay is a type of relay used in industrial automation.

• It is designed to handle high currents and voltages.

• Bukhoj relays are commonly used in robotic production lines to control various electrical components.

• They provide a reliable switching mechanism for controlling power circuits.

• Examples of applications include controlling motors, sole
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DSA like array linked list

Q1. Normal interview about you
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Q1. OOPS concepts list and explain
Ans. 
OOPS concepts are fundamental to object-oriented programming. They include encapsulation, inheritance, polymorphism, and abstraction.
• Encapsulation: bundling data and methods that operate on that data within a single unit.

• Inheritance: creating new classes from existing ones, inheriting their properties and methods.

• Polymorphism: the ability of objects to take on multiple forms, depending on the context.

• Abstraction: hidin...read more
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Q2. Project related questions
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Q3. Programs for inheritance, ArrayList operations
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Inheritance is a way to create new classes based on existing ones. ArrayList is a dynamic array implementation in Java.
• Inheritance allows a subclass to inherit properties and methods from a superclass.

• ArrayList operations include adding, removing, and accessing elements.

• Example of inheritance: class Dog extends Animal

• Example of ArrayList operation: myList.add(element)
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Q4. Mysql queries to demonstrate joins
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Q5. REST api methodology
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Q6. Spring annotations for data-jpa
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Spring annotations for data-jpa
• The @Entity annotation is used to mark a class as a persistent entity

• The @Repository annotation is used to indicate that the class provides the mechanism for storage, retrieval, search, update, and delete operation on objects

• The @Transactional annotation is used to specify the transactional behavior of a method or class

• The @Query annotation is used to specify a JPQL or native SQL query

• The...read more
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Q1. 1. how is motor connected to PLC 2.use of PID controller 3. which motor is used in fans 4. Inrush current 5. Is starting current more or running current
Ans. 
Motor is connected to PLC using motor starters or variable frequency drives. PID controller is used for precise control. Fans typically use induction motors. Inrush current is the initial surge of current when a motor starts. Starting current is usually higher than running current.
• Motor is connected to PLC using motor starters or variable frequency drives

• PID controller is used for precise control of motor speed or posi...read more
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Q1. 1. General electrical questions -difference between earthing and grounding. -frequency of volt in home supply and why? -voltage of power supply in homes? 2. Diff b/w -AC & DC motor -1 phase and 3 phase m...read more
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Q1. 1. Biggest achievements 2. why do you want to work here 3. strengths and weakness 4. example where you have used your strength qualities 5. about family
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Q1. What is semiconductor
Ans. 
A semiconductor is a material that has electrical conductivity between that of a conductor and an insulator.
• Semiconductors are used in electronic devices such as transistors, diodes, and integrated circuits.

• They have a band gap that allows them to selectively conduct electricity.

• Common semiconductor materials include silicon, germanium, and gallium arsenide.

• Semiconductors are crucial components in the field of electron
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