Privi Organics Diploma Trainee Engineer Interview Questions and Answers

Written aptitude test was taken. Difficulty level was moderate. Negative marking was there.

Q1. Draw the Oxygen atomic structure
Ans. 
Oxygen has 8 protons, 8 neutrons, and 8 electrons arranged in its atomic structure.
• Oxygen has an atomic number of 8, which means it has 8 protons.

• The atomic mass of Oxygen is approximately 16, so it has 8 neutrons.

• Oxygen has 8 electrons distributed in 2 electron shells, with 2 in the first shell and 6 in the second shell.
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Q2. Tell about specific density?
Ans. 
Specific density is the ratio of the density of a substance to the density of a reference substance.
• Specific density is a dimensionless quantity.

• It is calculated by dividing the density of the substance by the density of the reference substance.

• Common reference substances for specific density include water and air.

• Specific density is used in various fields such as engineering, physics, and chemistry.
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Q1. What is mass flux and kick's law
Ans. 
Mass flux is the amount of mass passing through a unit area per unit time. Kick's law relates to the energy required for size reduction.
• Mass flux is a measure of the amount of mass flowing through a given area per unit time.

• It is commonly used in chemical engineering to describe the flow of fluids through pipes or other conduits.

• Kick's law is a relationship between the energy required for size reduction and the size re...read more
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Q2. Mass flux= mass/time×area and Ja= - Dab×dca/dz
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The question relates to the calculation of mass flux and the use of the Ja equation.
• Mass flux is a measure of the amount of mass passing through a given area per unit time.

• It is calculated by dividing the mass flow rate by the area.

• Ja is a dimensionless quantity used in the study of mass transfer.

• It represents the concentration gradient along a distance in a system.

• Ja is calculated using the diffusion coefficient (Dab)...read more
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Q1. What is mass transfer
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Mass transfer is the movement of substances from one place to another due to a concentration gradient.
• Mass transfer involves the transfer of mass or substances between phases, such as gas-liquid, liquid-liquid, or solid-liquid.

• It occurs due to differences in concentration, temperature, pressure, or other driving forces.

• Examples of mass transfer include the evaporation of water from a wet surface, the diffusion of gases...read more
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