Praj Industries Graduate Engineer Trainee (Get) Interview Questions and Answers

The unit operations used in the plant during summer training.

• Distillation

• Filtration

• Crystallization

• Extraction

• Drying

• Mixing

Heat transfer coefficient changes with baffle spacing in heat exchangers. Other important factors include fluid properties, flow rate, and surface roughness.

• Heat transfer coefficient increases with decreasing baffle spacing

• Fluid properties such as viscosity and thermal conductivity affect heat transfer

• Higher flow rates can increase heat transfer coefficient

• Surface roughness can affect heat transfer by creating turbulen

Viscosity Index of lube measures its resistance to change in viscosity with temperature.

• Viscosity Index (VI) is an important property of lubricating oils.

• It measures the oil's ability to maintain its viscosity under different temperature conditions.

• Higher VI means the oil's viscosity changes less with temperature, indicating better performance.

• VI is calculated using kinematic viscosity measurements at two different tem...read more

Different kinds of distillation include simple distillation, fractional distillation, steam distillation, and vacuum distillation.

• Simple distillation is used to separate liquids with different boiling points.

• Fractional distillation is used to separate liquids with similar boiling points.

• Steam distillation is used to extract essential oils from plants.

• Vacuum distillation is used to separate liquids with high boiling poi...read more

Factors to consider for checking evaporator efficiency

• Temperature difference between inlet and outlet air

• Airflow rate

• Refrigerant flow rate

• Frost buildup on evaporator coils

• Cleanliness of evaporator coils

• Type of refrigerant used

I am a highly motivated individual with a passion for learning and a strong work ethic.

• I have a Bachelor's degree in Computer Science

• I have completed several internships in software development

• I am proficient in multiple programming languages including Java and Python

• I enjoy working in a team environment and collaborating on projects

• I am always looking for new challenges and opportunities to grow

Gujarat offers a rich cultural heritage, diverse cuisine, and a thriving business environment.

• Gujarat is home to several UNESCO World Heritage Sites such as the Rani ki Vav stepwell and the Champaner-Pavagadh Archaeological Park.

• The state is known for its delicious cuisine, including dishes like dhokla, thepla, and fafda.

• Gujarat has a strong economy, with a focus on industries such as textiles, chemicals, and pharmaceu...read more

Yes, I believe I can inspire others through my actions and words.

• I have a positive attitude and outlook on life

• I am passionate about my work and hobbies

• I enjoy helping others and sharing my knowledge and experiences

• I have received positive feedback and recognition for my leadership and motivational skills

I have the skills, experience, and passion to excel in this role.

• I have a proven track record of success in similar roles.

• I am highly motivated and dedicated to achieving results.

• I have excellent communication and interpersonal skills.

• I am a quick learner and adaptable to new situations.

• I am passionate about this industry and eager to contribute my expertise.

• I am confident that I can make a valuable contribution to you

Gibbs free energy is called free energy because it is the energy available to do work at constant temperature and pressure.

• Gibbs free energy is the maximum amount of work that can be obtained from a system at constant temperature and pressure.

• It takes into account both the enthalpy and entropy of a system.

• If the Gibbs free energy is negative, the reaction is spontaneous and can do work.

• Examples include the combustion o...read more

Maxwell's equations describe the behavior of electromagnetic fields.

• There are four equations: Gauss's law, Gauss's law for magnetism, Faraday's law, and Ampere's law with Maxwell's addition.

• Together, these equations explain how electric and magnetic fields interact and propagate through space.

• Maxwell's equations are fundamental to the study of electromagnetism and have many practical applications, such as in the design...read more

Designing of Distillation Column

• Determine the desired separation

• Select the appropriate column type

• Calculate the number of theoretical plates

• Determine the feed location and reflux ratio

• Design the reboiler and condenser

• Select appropriate materials of construction

• Consider safety and environmental factors