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20+ Protiviti Consulting Interview Questions and Answers

Updated 8 Oct 2024

Q1. What is material balance ? And wrote down the column material balance equation.

Ans.

Material balance is a fundamental concept in chemical engineering that involves accounting for the flow of materials into and out of a system.

  • Material balance is used to determine the amount of material present in a system at any given time.

  • It involves tracking the flow of materials into and out of the system, as well as any chemical reactions that may occur.

  • The material balance equation is typically written as: Accumulation = Inflow - Outflow + Generation - Consumption.

  • This ...read more

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Q2. 1) What is chemical engineer ? Can u jusitfy? 2) what is pump ? Can u explain the characteristics curves? 3) what is TR ? Are u able to design the colling tower.

Ans.

Answers to questions related to chemical engineering and cooling tower design.

  • Chemical engineering involves the application of chemistry, physics, and mathematics to design and operate chemical processes.

  • A pump is a mechanical device used to move fluids from one place to another. The characteristics curves show the relationship between flow rate, head, and power consumption.

  • TR stands for ton of refrigeration and is a unit of power used in refrigeration and air conditioning. D...read more

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Q3. What is heat duty? And design the heat exchanger by Kern's method.

Ans.

Heat duty is the amount of heat energy required to be transferred in a heat exchanger.

  • Heat duty is calculated based on the temperature difference between the hot and cold fluids, and the flow rates of the fluids.

  • Kern's method is a widely used method for designing heat exchangers.

  • It involves calculating the overall heat transfer coefficient and the heat transfer area required for the given heat duty.

  • The design process also involves selecting the appropriate type of heat exchan...read more

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Q4. 4 kg steam how many temperature will be achieved?

Ans.

The temperature achieved by 4 kg steam depends on the pressure and initial temperature of the steam.

  • The temperature achieved by 4 kg steam can be calculated using the steam tables.

  • The pressure and initial temperature of the steam must be known to calculate the final temperature.

  • The specific heat capacity of water and steam must also be taken into account.

  • Assuming standard atmospheric pressure, 4 kg of steam at 100°C will have a final temperature of 100°C.

  • If the steam is at a ...read more

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Q5. What is the Boling point ? By mcabe-thiele?

Ans.

The boiling point is the temperature at which a liquid turns into a gas.

  • It is a characteristic property of a substance.

  • It depends on the pressure of the surroundings.

  • The McCabe-Thiele method is used to determine the boiling point of a mixture.

  • Water boils at 100 degrees Celsius at standard atmospheric pressure.

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Q6. What is mcab- theile method are aware about this ?

Ans.

The mcab-theile method is a technique used in electrical engineering for circuit analysis and design.

  • It is used to convert a transfer function into a rational function

  • It is commonly used in filter design

  • It involves finding the partial fraction expansion of the transfer function

  • It is named after its inventors, J. McAb and E. Theile

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Q7. what is shape clorine tonner in concave?

Ans.

The question is unclear and does not make sense.

  • The question needs to be rephrased or clarified.

  • It is unclear what is meant by 'shape chlorine tonner in concave'.

  • More information is needed to answer this question.

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Q8. What are the valve types ? And thier applications

Ans.

Valve types include gate, globe, ball, butterfly, and check valves, each with unique applications.

  • Gate valves are used for on/off control in pipelines

  • Globe valves are used for regulating flow and pressure

  • Ball valves are used for quick shut-off and control of flow

  • Butterfly valves are used for low-pressure applications

  • Check valves are used to prevent backflow

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Q9. What is the optimum reflux ratio ?

Ans.

The optimum reflux ratio depends on the specific process and desired outcome.

  • The optimum reflux ratio is the ratio of the amount of liquid refluxed to the amount of liquid that is vaporized in a distillation column.

  • It is determined by the specific process and desired outcome, such as purity or yield.

  • A higher reflux ratio generally leads to higher purity but lower yield, while a lower reflux ratio leads to higher yield but lower purity.

  • The optimum reflux ratio can be determine...read more

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Q10. What is the part of fire extinguisher and how to maintain this

Ans.

A fire extinguisher consists of a cylinder, nozzle, handle, and extinguishing agent. Proper maintenance is crucial for effectiveness.

  • The cylinder should be checked for dents or corrosion

  • The pressure gauge should be checked regularly to ensure it is in the green zone

  • The nozzle should be inspected for blockages or damage

  • The handle should be checked to ensure it is not loose or damaged

  • The extinguishing agent should be replaced if used or expired

  • Store in a cool, dry place away fr...read more

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Q11. Which type of plants sustainable in chemical industry ..

Ans.

Plants that are sustainable in the chemical industry are those that can help in reducing pollution, improving air quality, and promoting a healthier environment.

  • Plants that can help in phytoremediation, such as sunflowers, willows, and poplars, are sustainable in the chemical industry.

  • Plants that can be used for biofiltration, such as spider plants, peace lilies, and English ivy, are also beneficial in chemical industry settings.

  • Plants that can absorb harmful chemicals and po...read more

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Q12. Property of chemical which are we worked with.

Ans.

Chemical properties include physical state, color, odor, solubility, melting point, boiling point, and reactivity.

  • Physical state: solid, liquid, gas

  • Color: colorless, white, yellow, etc.

  • Odor: odorless, pungent, sweet, etc.

  • Solubility: soluble in water, insoluble in organic solvents, etc.

  • Melting point: temperature at which solid turns to liquid

  • Boiling point: temperature at which liquid turns to gas

  • Reactivity: how it reacts with other substances

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Q13. What is modes of heat transfer

Ans.

Modes of heat transfer refer to the ways in which heat can be transferred from one object to another.

  • Conduction: Heat transfer through direct contact between objects (e.g. touching a hot pan)

  • Convection: Heat transfer through the movement of fluids or gases (e.g. boiling water)

  • Radiation: Heat transfer through electromagnetic waves (e.g. feeling the warmth of the sun)

  • Examples: Cooking food on a stove (conduction), heating a room with a radiator (convection), feeling the warmth ...read more

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Q14. What is the cost of landscaping in per acer

Ans.

The cost of landscaping per acre varies depending on factors such as location, size of the area, type of landscaping, and materials used.

  • Cost can range from $1,000 to $20,000 per acre

  • Factors influencing cost include labor, materials, equipment, and design complexity

  • High-end landscaping with features like irrigation systems or exotic plants can cost more

  • Location also plays a role, with urban areas typically being more expensive than rural areas

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Q15. Difference between distilation and evaporation

Ans.

Distillation is a process of separating components in a liquid mixture based on boiling points, while evaporation is a process of converting a liquid into vapor.

  • Distillation involves heating a liquid mixture to separate components based on their boiling points.

  • Evaporation involves converting a liquid into vapor by heating or exposing it to air.

  • Distillation is used in industries to purify liquids like alcohol, while evaporation is a natural process like drying clothes in the s...read more

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Q16. Safety and discard method for hezardous chemical

Ans.

Proper safety measures and disposal methods must be followed for hazardous chemicals.

  • Wear appropriate personal protective equipment (PPE) when handling hazardous chemicals.

  • Store hazardous chemicals in designated areas with proper labeling.

  • Dispose of hazardous chemicals according to local regulations and guidelines.

  • Examples of hazardous chemicals include acids, bases, solvents, and pesticides.

  • Never mix different hazardous chemicals together.

  • In case of a spill or accident, foll...read more

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Q17. All Chemical Properties of Material Handled

Ans.

Chemical properties of materials handled in production process.

  • Identify chemical composition of materials used in production

  • Understand reactivity of materials with other substances

  • Ensure proper handling and storage of materials to prevent accidents

  • Monitor and control chemical reactions during production

  • Implement safety measures to protect workers from exposure to hazardous chemicals

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Q18. Agitator scale up criteria

Ans.

Agitator scale up criteria involves factors like power input, mixing time, impeller diameter, and fluid properties.

  • Power input should be proportional to the cube of the impeller diameter

  • Mixing time should be adjusted to ensure proper mixing without over-shearing the fluid

  • Fluid properties such as viscosity and density should be considered when scaling up

  • Pilot testing can help determine the appropriate scale up criteria

  • Examples of agitator scale up criteria include increasing i...read more

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Q19. Types of pump and application

Ans.

There are various types of pumps used for different applications, such as centrifugal pumps for water supply and positive displacement pumps for oil and gas industry.

  • Centrifugal pumps are commonly used for water supply, irrigation, and HVAC systems.

  • Positive displacement pumps are used in the oil and gas industry for transferring viscous fluids.

  • Diaphragm pumps are suitable for pumping chemicals and pharmaceuticals.

  • Peristaltic pumps are used in medical devices for precise fluid...read more

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Q20. Cooling tower types

Ans.

Cooling towers are used to remove heat from a building or industrial process by transferring it to the atmosphere.

  • Cooling towers can be classified into two main types: natural draft and mechanical draft.

  • Natural draft cooling towers use the stack effect to draw air through the tower, while mechanical draft cooling towers use fans to force air through the tower.

  • Examples of cooling tower types include crossflow, counterflow, and hyperbolic cooling towers.

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Q21. Heat Exchanger Type

Ans.

Heat exchangers are devices used to transfer heat between two or more fluids.

  • There are several types of heat exchangers, including shell and tube, plate, and finned tube heat exchangers.

  • Shell and tube heat exchangers are commonly used in industrial applications, while plate heat exchangers are more compact and efficient.

  • Finned tube heat exchangers are often used in HVAC systems to increase heat transfer efficiency.

  • The type of heat exchanger used depends on factors such as the...read more

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Q22. Can handle multiples roles

Ans.

Yes, I have experience handling multiple roles and have developed strong multitasking skills.

  • I have successfully managed multiple projects simultaneously in my previous job.

  • I am comfortable switching between different tasks and prioritizing them based on their urgency.

  • I have also trained and mentored team members while handling my own responsibilities.

  • For example, in my previous job, I was responsible for managing the social media accounts, creating content, and also handling...read more

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Q23. MSDS of chemical

Ans.

MSDS stands for Material Safety Data Sheet, which provides information on the properties of chemicals and how to safely handle them.

  • MSDS includes information on chemical composition, physical and chemical properties, health hazards, and safety precautions.

  • It also provides information on first aid measures, firefighting measures, and accidental release measures.

  • Examples of information found in an MSDS include boiling point, flash point, toxicity levels, and recommended persona...read more

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Q24. What Is Your Pay Scale

Ans.

My pay scale is competitive and based on my qualifications, experience, and the responsibilities of the role.

  • My pay scale is determined by factors such as my qualifications, experience, and the responsibilities of the role.

  • I have a competitive pay scale that aligns with industry standards.

  • I am open to discussing salary expectations during the negotiation process.

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Q25. What is lean 6sigma

Ans.

Lean 6sigma is a methodology that combines lean manufacturing principles with Six Sigma techniques to improve efficiency and quality.

  • Combines lean manufacturing principles with Six Sigma techniques

  • Focuses on eliminating waste and reducing variation in processes

  • Uses tools like value stream mapping, 5S, DMAIC, and statistical analysis

  • Aims to improve efficiency, quality, and customer satisfaction

  • Example: Implementing lean 6sigma in a production line to reduce defects and improve...read more

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Q26. Drow a P&ID of plant

Ans.

A P&ID is a diagram that shows the interconnection of process equipment and the instrumentation used to control the process.

  • Identify the major equipment and their interconnections

  • Include all the valves, pumps, tanks, and other process equipment

  • Show the flow of materials and energy through the system

  • Indicate the control loops and instrumentation used to monitor and control the process

  • Use standard symbols and abbreviations

  • Label all the equipment and instrumentation

  • Include a leg...read more

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Q27. What is R &D

Ans.

R&D stands for Research and Development. It is the process of creating new products or improving existing ones through scientific research.

  • R&D involves conducting research to develop new products or improve existing ones

  • It is a crucial part of innovation and helps companies stay competitive

  • R&D can involve a wide range of fields, from technology to medicine

  • Examples of R&D include developing new drugs, creating new software, and designing new materials

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Q28. Hazop Old experience

Ans.

Hazard and Operability Study (HAZOP) is a systematic approach to identify and evaluate potential hazards and operability issues in a process.

  • HAZOP is a team-based approach that involves brainstorming sessions to identify potential hazards and operability issues.

  • The team identifies deviations from the intended design and evaluates their potential consequences.

  • The study results in recommendations for mitigating or eliminating identified hazards and improving operability.

  • HAZOP i...read more

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Q29. Name of reaction

Ans.

Sorry, I cannot answer this question without more information.

  • Please provide the name of the reaction you are referring to.

  • Without more context, it is impossible to provide a meaningful answer.

  • Can you provide any additional information about the reaction in question?

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