Himadri Speciality Chemical Graduate Engineer Interview Questions and Answers

Domain based questions and basic aptitude question

Q1. About distillation column, basic questions ,cooling tower concept.
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Q2. Difference between CSTR and PFR, Pumps ,Heat Exchanger.
Ans. 
CSTR and PFR are types of reactors, pumps are used to move fluids, heat exchangers transfer heat between fluids.
• CSTR (Continuous Stirred Tank Reactor) has a constant volume and operates under steady-state conditions.

• PFR (Plug Flow Reactor) has a varying volume and operates under unsteady-state conditions.

• Pumps are mechanical devices used to move fluids from one place to another, like centrifugal pumps or positive displ...read more
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Q3. What is cracking
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Cracking is a process in which complex hydrocarbon molecules are broken down into simpler molecules.
• Cracking is a refining process used to convert large hydrocarbon molecules into smaller, more valuable ones.

• It is done by breaking the carbon-carbon bonds in the molecules.

• Examples include catalytic cracking and steam cracking.
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Q4. What is Reforming
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Reforming is a process used in the petroleum industry to convert low-octane naphtha into high-octane gasoline.
• Reforming involves rearranging the molecular structure of hydrocarbons to increase their octane rating.

• It is typically done using a catalyst at high temperatures and pressures.

• The process can also produce hydrogen gas as a byproduct.

• Reforming is an important step in the production of gasoline and other fuels in...read more
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Q5. What is range and approach of cooling tower
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The range of a cooling tower refers to the maximum distance at which it can effectively cool air, while the approach is the temperature difference between the cooled water and the entering air.
• Range of a cooling tower is typically around 5-20 degrees Fahrenheit

• Approach of a cooling tower is usually around 8-15 degrees Fahrenheit

• The range and approach of a cooling tower can vary based on factors such as design, size, an
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Automation Vs. Manual work at industries

Q1. Baiscally about projects, management about work
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Very easy question but time is not more.

1st Introduction.
2nd Project
3rd Favourite Subject
4th Technical Questions
5th General knowledge
6th Hr round

I am selected in 1st round ,so 2nd time Interview for Technical + Hr

Q1. Being a mechanical Engineer you should aware about the basic of fluid mechanics Heat transfer and little bit strength of materials subjects was more weightage in the technical interview.
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Q2. How to design equipment?
Ans. 
Equipment design involves identifying user needs, creating prototypes, testing, and refining the design.
• Identify user needs and requirements

• Create prototypes and test them thoroughly

• Refine the design based on feedback and testing

• Consider safety, ergonomics, and usability

• Use appropriate materials and manufacturing processes

• Ensure compliance with relevant regulations and standards
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Q3. What was centrifugal pump and difference between pump and compressor?
Ans. 
A centrifugal pump is a mechanical device used to transport fluids by converting rotational kinetic energy to hydrodynamic energy.
• Centrifugal pumps are commonly used in industries such as oil and gas, chemical, and water treatment.

• They work by using an impeller to create a low-pressure area at the center of the pump, which draws in fluid and then expels it at high pressure through the outlet.

• Pumps are used to transport...read more
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Q4. What was NPSH? Types of pumps..
Ans. 
NPSH stands for Net Positive Suction Head. It is a measure of the pressure available at the suction side of a pump to prevent cavitation.
• NPSH is important in pump selection and operation.

• It is the difference between the total suction head and the vapor pressure of the pumped fluid.

• Insufficient NPSH can lead to cavitation, which can damage the pump and reduce its efficiency.

• Different types of pumps have different NPSH r...read more
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