Wipro PARI Graduate Engineer Interview Questions and Answers

Q1. What is resistor?
Ans. 
A resistor is an electronic component that resists the flow of electrical current.
• Resistors are used to control the amount of current flowing in a circuit.

• They are measured in ohms (Ω) and have color-coded bands to indicate their resistance value.

• Resistors dissipate energy in the form of heat when current flows through them.

• Examples of resistors include carbon film resistors, metal film resistors, and wirewound resisto
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Q2. Advantages of dc motor?
Ans. 
DC motors have advantages such as high starting torque, easy speed control, and simple construction.
• High starting torque allows for quick acceleration

• Easy speed control through voltage adjustment

• Simple construction with fewer parts and lower cost

• Efficient operation with minimal energy loss

• Suitable for applications requiring constant speed or variable speed operation
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Q3. Advantages of rotor?
Ans. 
Rotors provide mechanical advantage, increase efficiency, and allow for compact design.
• Rotors provide mechanical advantage by converting rotational motion into linear motion.

• They increase efficiency by reducing friction and wear compared to sliding or rubbing components.

• Rotors allow for compact design in various applications such as engines, turbines, and pumps.

• Examples include helicopter rotors, brake rotors in vehicl
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Q4. What is electric current?
Ans. 
Electric current is the flow of electric charge through a conductor.
• Electric current is measured in Amperes (A).

• It is caused by the movement of electrons in a conductor.

• The direction of current flow is from positive to negative.

• Examples of sources of electric current include batteries and power outlets.
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Q5. What is stator?
Ans. 
Stator is the stationary part of an electric motor or generator.
• Stator is the stationary component in an electric motor or generator that surrounds the rotor.

• It does not rotate and is responsible for producing a magnetic field to interact with the rotor.

• Examples include the stator in a car alternator or the stator in a wind turbine generator.
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Q6. What are the advantages of generator
Ans. 
Generators provide backup power during outages and can be used in remote locations.
• Provides backup power during outages

• Can be used in remote locations where power grid is not available

• Used in construction sites, camping trips, outdoor events, etc.
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Normal aptitude test on topic like ages, trains and boats,probability etc

One topic is given by them and the Group discussion is started among 4 candidates

Q1. In this they mostly asked on final year project and what we learnt during engineering etc
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Q1. Why mechanical engineering as a stream
Ans. 
I chose mechanical engineering because of my passion for designing and building machines that improve people's lives.
• Fascination with how things work and desire to create innovative solutions

• Interest in applying principles of physics and mathematics to real-world problems

• Opportunities to work in diverse industries such as automotive, aerospace, and robotics

• Ability to contribute to sustainable development through energy
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Q2. Family details and their occupation
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Aptitude test + Technical test which is most common

Engineering test on pen and paper

Q1. What is mechanical advantage
Ans. 
Mechanical advantage is a measure of the force amplification achieved by using a tool, mechanical device, or machine.
• It is calculated as the ratio of the output force to the input force.

• A mechanical advantage greater than 1 indicates that the machine amplifies the input force.

• Examples include levers, pulleys, and gears which are designed to provide mechanical advantage in various applications.
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Q2. How a man can lift a car
Ans. 
A man can lift a car by using a car jack or by having multiple people help lift it together.
• Use a car jack to lift the car off the ground

• Have multiple people help lift the car together

• Utilize leverage by lifting from a strong point on the car, such as the frame or bumper
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Q3. Problem related to fluid flow
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Q4. Previous internship experience related questions
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Q5. Why we should hire you than a experienced candidate
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Got some aptitude question in the company side, and the candidates want to finish in the given time

Q1. Basic question about my resume
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Q2. Analytic questions and case study question to test my handling the situation skills
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Q1. Detail OOP concept with real life examples?
Ans. 
OOP is a programming paradigm based on the concept of objects, which can contain data in the form of fields and code in the form of procedures.
• OOP focuses on creating objects that interact with each other to solve problems

• Encapsulation: Objects can hide their internal state and require interaction through defined interfaces

• Inheritance: Objects can inherit attributes and methods from parent classes

• Polymorphism: Objects ...read more
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Q2. SQL query to find highest salary.
Ans. 
Use SQL query with MAX function to find highest salary.
• Use SELECT statement with MAX function to retrieve highest salary from salary column.

• Example: SELECT MAX(salary) FROM employees;

• Make sure to replace 'employees' with the actual table name where salary data is stored.
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Q1. Pneumatic cylinders and it process
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Q2. Pneumatic circuits
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Q1. What are the applications of a Zener diode?
Ans. 
Zener diodes are used for voltage regulation, voltage reference, surge protection, and in voltage stabilizers.
• Voltage regulation in power supplies

• Voltage reference in circuits

• Surge protection in electronic devices

• Voltage stabilizers in automotive systems

• Overvoltage protection in communication systems
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Assignment consist of MCQ test dealing with technical knowledge followed by game where you need to answer as much as answer in limited time (negative marking is there).

Q1. Basics about Electronic Devices
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Q2. Some general questions regarding electrical devices
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