Yara Fertilisers Graduate Trainee Interview Questions and Answers

Q1. Technic questions Heat transfer opretion Over all heat transfer coefficient
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Q2. Technical questions Heat transfer opretion
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Q1. Technical questions Mass transfer opretion
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Plant

Plant manufacturing

General

Q1. VFD, drive, PLC programming
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Q1. Technical questions
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Q2. Grade of transformer oil
Ans. 
Transformer oil is graded based on its dielectric strength and viscosity.
• Transformer oil is graded based on its dielectric strength, which indicates its ability to insulate and protect the transformer from electrical breakdown.

• The viscosity of transformer oil is also an important factor in determining its grade, as it affects the flow and lubrication properties of the oil.

• Common grades of transformer oil include minera...read more
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Q1. What is relative volatility
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Relative volatility is a measure of how easily a component in a mixture can be separated from other components through distillation.
• Relative volatility is calculated as the ratio of the vapor pressures of the two components being separated.

• It is used in distillation processes to determine the efficiency of separation.

• Higher relative volatility indicates easier separation of components.

• For example, in the separation of ...read more
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Q1. What is Distillation
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Distillation is a process of separating components of a liquid mixture based on differences in boiling points.
• Distillation involves heating the liquid mixture to create vapor, then cooling the vapor to condense it back into liquid form.

• The components with lower boiling points will vaporize first and be collected, while the components with higher boiling points will remain in liquid form.

• Examples of distillation include...read more
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Q2. Difference absorber Column and strippers column
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Absorber column absorbs a gas into a liquid, while a stripper column removes a component from a liquid.
• Absorber column is used to absorb a gas into a liquid, while a stripper column is used to remove a component from a liquid.

• Absorber column operates at a higher pressure than the stripper column.

• Absorber column is used in processes like gas sweetening, while stripper column is used in processes like solvent recovery.

• Ex...read more
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Q1. How to design heat exchanger?
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Designing a heat exchanger involves determining heat transfer requirements, selecting appropriate materials, and optimizing the design for efficiency.
• Determine heat transfer requirements based on the fluids involved, flow rates, and temperature differentials.

• Select appropriate materials based on the compatibility with the fluids, operating temperatures, and pressure requirements.

• Optimize the design for efficiency by co...read more
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Q2. What is enthalphy?
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Enthalpy is a thermodynamic property that represents the total energy of a system, including internal energy and the amount of energy required to create or release the system.
• Enthalpy is denoted by the symbol H and is expressed in units of energy (such as Joules or calories).

• It is defined as H = U + PV, where U is the internal energy of the system, P is the pressure, and V is the volume.

• Enthalpy change (ΔH) is commonly...read more
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Q1. Back company all process
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Q2. I am also join coromandel in contract roll so no more quection
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Q1. Sallery discussed
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Q1. Fans vs blowers
Ans. 
Fans are used to create airflow in a specific direction, while blowers are used to generate high-pressure airflow in a concentrated area.
• Fans are typically used for cooling purposes in electronics or ventilation in buildings.

• Blowers are commonly used in HVAC systems, industrial processes, and automotive applications.

• Fans have lower pressure capabilities compared to blowers.

• Blowers are more efficient in moving air over ...read more
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Q2. Design of heat exchanger
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Heat exchangers are devices used to transfer heat between two or more fluids.
• Heat exchangers can be classified based on their construction (e.g. shell and tube, plate, finned tube)

• Design considerations include fluid flow rates, temperature ranges, material selection, and pressure drop

• Efficiency of heat exchangers can be improved by increasing surface area for heat transfer

• Examples of heat exchangers include car radiato...read more
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Q1. How many questions in interview
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