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Godrej Industries

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20+ Interview Questions and Answers

Updated 9 Nov 2024

Q1. why do we use startin methods to start induction motor n xplain them

Ans.

Starting methods are used to start induction motors. They provide the necessary starting torque and prevent damage to the motor.

  • Induction motors require a high starting current to generate the necessary torque to start rotating.

  • Starting methods include direct-on-line, star-delta, soft starters, and variable frequency drives.

  • Direct-on-line is the simplest and most common method, but can cause a high inrush current and mechanical stress on the motor.

  • Star-delta reduces the start...read more

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Q2. how will u convey concept of generator to a common man

Ans.

A generator is a machine that converts mechanical energy into electrical energy.

  • Generators are used to produce electricity in power plants.

  • They work by rotating a coil of wire inside a magnetic field.

  • This movement creates an electrical current that can be used to power homes and businesses.

  • Generators can also be used as backup power sources during blackouts or emergencies.

  • Think of a generator like a bicycle dynamo that powers a light bulb.

  • The faster you pedal, the brighter th...read more

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Q3. can we start indn motors of higher ratings direct online, justify

Ans.

Yes, but it depends on the motor's starting current and the capacity of the power supply.

  • Direct online starting is suitable for motors with low starting current and when the power supply can handle the high inrush current.

  • For higher rated motors, it is recommended to use soft starters or variable frequency drives to reduce the starting current and prevent damage to the motor and power supply.

  • Examples of motors that can be started direct online include small motors used in hou...read more

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Q4. why oil is used in transformer?

Ans.

Oil is used in transformers for insulation and cooling purposes.

  • Oil provides insulation between the windings and the core of the transformer.

  • Oil also helps in dissipating the heat generated during the operation of the transformer.

  • The oil used in transformers is usually mineral oil or synthetic oil.

  • The oil needs to be tested and maintained regularly to ensure proper functioning of the transformer.

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Q5. is trasnformer a machine?

Ans.

Yes, a transformer is a machine that is used to transfer electrical energy from one circuit to another.

  • Transformers are used in power stations to step up or step down the voltage of electricity.

  • They are also used in electronic devices to convert AC voltage to DC voltage.

  • Transformers work on the principle of electromagnetic induction.

  • They consist of two coils of wire wrapped around a magnetic core.

  • When an alternating current flows through one coil, it creates a magnetic field ...read more

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Q6. function of silica jel in transformer?

Ans.

Silica gel is used as a drying agent in transformers to prevent moisture buildup.

  • Silica gel absorbs moisture from the air and prevents it from entering the transformer.

  • Moisture buildup can cause insulation failure and reduce the lifespan of the transformer.

  • Silica gel is often used in conjunction with a breather to maintain a dry environment inside the transformer.

  • Regular maintenance and replacement of the silica gel is necessary to ensure its effectiveness.

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Q7. why water is not used?

Ans.

Water is not used in what context?

  • Water may not be suitable for certain processes or equipment due to its chemical properties

  • Water can cause corrosion or damage to certain materials

  • Alternative substances may be more effective or efficient for the intended purpose

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Q8. Distillation, absorption, Acid handling, What is vaccum and why we use.

Ans.

Vacuum is a space devoid of matter, used in distillation and absorption processes to lower boiling points and increase efficiency.

  • Vacuum is a space devoid of matter, creating lower pressure than atmospheric pressure.

  • In distillation, vacuum is used to lower the boiling points of substances, making separation easier.

  • In absorption processes, vacuum helps remove gases from a liquid by lowering the pressure.

  • Vacuum is also used in acid handling to prevent leaks and spills.

  • Examples ...read more

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Q9. what is basic eqn of Xmer

Ans.

The basic equation of a transformer is V1/V2 = N1/N2.

  • The equation relates the voltage ratio to the turns ratio of the transformer.

  • V1 is the primary voltage, V2 is the secondary voltage, N1 is the number of turns in the primary coil, and N2 is the number of turns in the secondary coil.

  • The equation is used to calculate the output voltage of a transformer given the input voltage and turns ratio.

  • It is also used to determine the required turns ratio for a transformer to achieve a ...read more

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Q10. function of fuse?

Ans.

A fuse is a safety device that protects electrical circuits from overloading by breaking the circuit when the current exceeds a certain level.

  • Fuses are made of a metal wire or filament that melts when the current exceeds a safe level.

  • Fuses are rated by the amount of current they can safely carry.

  • Fuses are commonly used in household electrical systems, cars, and other machinery.

  • When a fuse blows, it must be replaced with a new one of the same rating.

  • Fuses are an important safe...read more

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Q11. tell me abt urself

Ans.

I am a technical engineer with experience in designing and implementing complex systems.

  • I have a degree in engineering and have worked in the field for 5 years.

  • I specialize in network architecture and have designed systems for large corporations.

  • I am skilled in programming languages such as Java and Python.

  • I am a quick learner and enjoy staying up-to-date with the latest technology trends.

  • I am a team player and enjoy collaborating with others to solve complex problems.

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Q12. 1. Cost saving initiative in utilities like boiler, air compressor, Cooling Tower etc 2. Types of flow, Reynolds number 3. Selection of heat exchanger as per process, diffrence between shell and tube and Plate ...

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Ans.

Answering questions related to cost-saving initiatives in utilities and selection of heat exchangers.

  • For cost-saving initiatives, regular maintenance and monitoring of equipment can help identify areas for improvement.

  • Reynolds number is used to determine the type of flow in a fluid system.

  • Selection of heat exchangers depends on the process requirements and factors like heat transfer rate, pressure drop, and cost.

  • Shell and tube heat exchangers are suitable for high-pressure ap...read more

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Q13. function of tester

Ans.

The function of a tester is to identify defects and ensure the quality of software products.

  • Test software products to identify defects

  • Ensure software products meet quality standards

  • Collaborate with developers to resolve issues

  • Create and execute test plans and cases

  • Document and report defects and test results

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Q14. Type of reaction handling on field

Ans.

I am trained in handling emergency reactions on field, including first aid, CPR, and basic life support.

  • Trained in first aid techniques

  • Knowledge of CPR procedures

  • Able to provide basic life support in emergency situations

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Q15. Process which you handle

Ans.

I handle the process of project management from initiation to closure.

  • Initiating projects by defining objectives, scope, and stakeholders

  • Planning projects by creating schedules, budgets, and resource allocation

  • Executing projects by managing teams, monitoring progress, and controlling quality

  • Closing projects by conducting post-project evaluations and archiving project documents

  • Examples: managing a software development project, organizing a marketing campaign, coordinating a co...read more

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Q16. what is difference between dry type and oil type

Ans.

Dry type and oil type are two types of transformers based on the insulation used.

  • Dry type transformers use air as insulation while oil type transformers use oil as insulation.

  • Dry type transformers are safer and more environmentally friendly than oil type transformers.

  • Oil type transformers are more efficient and can handle higher loads than dry type transformers.

  • Dry type transformers are typically used in indoor applications while oil type transformers are used in outdoor appl...read more

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Q17. What is process cantrol Cavitation , Pump , Exchanger

Ans.

Process control involves monitoring and adjusting various parameters to ensure efficient and safe operation of industrial processes.

  • Cavitation is a phenomenon that can occur in pumps and can be controlled through proper design and operation.

  • Pumps are used to move fluids through a system and their performance can be controlled through adjusting speed or impeller size.

  • Exchangers are used to transfer heat between fluids and their performance can be controlled through adjusting f...read more

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Q18. what is the power factor and how it will maintain

Ans.

Power factor is the ratio of real power to apparent power in an AC circuit. It can be maintained by using capacitors or inductors.

  • Power factor is a measure of how efficiently electrical power is being used

  • It is expressed as a decimal or a percentage

  • A power factor of 1 means all the power is being used efficiently

  • A power factor less than 1 means some power is being wasted

  • Capacitors or inductors can be used to correct power factor

  • Power factor correction can reduce energy costs ...read more

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Q19. what is the principle of potentiometer?

Ans.

Potentiometer is a device used to measure potential difference by comparing it with a known voltage.

  • Potentiometer works on the principle of balancing the unknown voltage with a known voltage.

  • It consists of a long resistive wire with a sliding contact called a wiper.

  • The wiper is moved along the wire to find the point where the potential difference is zero.

  • Potentiometers are used in various applications such as volume control in audio systems and as a variable resistor in elect...read more

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Q20. what is industrial safety and industrial hygeine

Ans.

Industrial safety focuses on preventing accidents and injuries in the workplace, while industrial hygiene deals with identifying and controlling workplace hazards.

  • Industrial safety involves implementing safety protocols, conducting safety training, and ensuring compliance with safety regulations.

  • Industrial hygiene involves assessing and controlling exposure to physical, chemical, and biological hazards in the workplace.

  • Examples of industrial safety measures include wearing pe...read more

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Q21. How to handle a hazardous chemicals.

Ans.

Handling hazardous chemicals requires proper training, protective equipment, and adherence to safety protocols.

  • Obtain proper training on handling hazardous chemicals

  • Wear appropriate personal protective equipment (PPE) such as gloves, goggles, and lab coats

  • Follow safety protocols and guidelines provided by the chemical manufacturer

  • Store hazardous chemicals in designated areas with proper labeling

  • Dispose of hazardous waste according to regulations

  • In case of spills or accidents,...read more

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Q22. Desile engine repair and maintenance

Ans.

Desile engine repair and maintenance involves troubleshooting, repairing, and maintaining diesel engines in various equipment and machinery.

  • Perform regular maintenance tasks such as changing oil, filters, and belts

  • Troubleshoot and diagnose issues with the engine's electrical systems

  • Repair or replace faulty components such as injectors, fuel pumps, and alternators

  • Ensure proper functioning of the engine's cooling and exhaust systems

  • Follow safety protocols and guidelines when wo...read more

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Q23. How lubricity machine works?

Ans.

A lubricity machine measures the friction and wear properties of lubricants.

  • The machine applies a load to a test specimen while it is in contact with the lubricant being tested.

  • The test specimen is typically a metal ball or pin.

  • The machine measures the force required to move the test specimen and calculates the coefficient of friction.

  • The machine can also measure the wear scar diameter on the test specimen after the test is complete.

  • Lubricity machines are commonly used in the...read more

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Q24. What is PID Controller ?

Ans.

PID Controller is a feedback control loop mechanism used in industrial control systems.

  • PID stands for Proportional, Integral, and Derivative.

  • It continuously calculates an error value as the difference between a desired setpoint and a measured process variable.

  • The controller then adjusts the process control inputs to minimize the error and bring the process variable closer to the setpoint.

  • It is widely used in industries such as manufacturing, chemical processing, and power gen...read more

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Q25. How many your wasy to sell the product

Ans.

There are multiple ways to sell a product, including direct sales, online sales, through distributors, and through partnerships.

  • Direct sales to individual customers

  • Online sales through e-commerce platforms

  • Sales through distributors or resellers

  • Partnerships with other companies for joint promotions or sales

  • Utilizing social media and digital marketing for sales

  • Offering discounts or promotions to attract customers

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Q26. How many types of pump.

Ans.

There are several types of pumps used in various industries and applications.

  • Centrifugal pumps

  • Reciprocating pumps

  • Rotary pumps

  • Diaphragm pumps

  • Gear pumps

  • Peristaltic pumps

  • Jet pumps

  • Submersible pumps

  • Screw pumps

  • Vane pumps

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Q27. What is balance sheet

Ans.

Balance sheet is a financial statement that shows a company's assets, liabilities, and shareholders' equity at a specific point in time.

  • It provides a snapshot of a company's financial position

  • Assets are listed on one side, liabilities and equity on the other

  • The balance sheet equation is Assets = Liabilities + Shareholders' Equity

  • Example: If a company has $100 in assets, $60 in liabilities, and $40 in equity, the balance sheet would show $100 = $60 + $40

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