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

Condenser area calculation is based on heat transfer requirements and drying time depends on factors like temperature, humidity, and airflow.

• Calculate condenser area based on heat transfer requirements and desired cooling capacity

• Consider factors like temperature, humidity, and airflow when determining drying time

• Use formulas such as Q = U * A * deltaT for heat transfer calculations

• Optimize condenser design to maximize

Water is used as a major part of utility due to its abundance, versatility, cost-effectiveness, and environmentally friendly properties.

• Abundance: Water is readily available in nature and can be easily sourced for various industrial processes.

• Versatility: Water can be used for a wide range of applications such as cooling, cleaning, and as a solvent.

• Cost-effectiveness: Water is relatively inexpensive compared to other u...read more

Scale-up is the process of increasing the production capacity of a system or process.

• Scale-up involves transferring a process from a small scale to a larger scale.

• Factors such as equipment size, operating conditions, and material properties need to be considered during scale-up.

• Examples of scale-up include increasing the batch size of a chemical reaction or transitioning from a lab-scale production to a pilot plant or

Reaction kinetics is the study of rates at which chemical reactions occur.

• Reaction kinetics involves studying the factors that affect the speed of a chemical reaction.

• It includes determining the reaction mechanism, rate laws, and reaction rates.

• Examples of factors affecting reaction kinetics include temperature, concentration, and catalysts.

Factors affecting lyophilization

• Temperature: The temperature during the lyophilization process affects the rate of sublimation and drying.

• Pressure: The pressure inside the lyophilizer chamber affects the rate of sublimation and drying.

• Product formulation: The composition and concentration of the product being lyophilized can impact the process.

• Freezing method: The method used to freeze the product prior to lyophilizati...read more

The triple point is the temperature and pressure at which all three phases of a substance (solid, liquid, and gas) coexist in equilibrium.

• The triple point is a unique combination of temperature and pressure for a substance.

• At the triple point, the solid, liquid, and gas phases of the substance can coexist in equilibrium.

• It is the point on a phase diagram where all three phases meet.

• The triple point is a fixed point use...read more

Validation of lyophilizer involves testing and documentation to ensure its performance and reliability.

• Validation of lyophilizer is necessary to ensure that it consistently produces high-quality freeze-dried products.

• The process involves testing various parameters such as temperature, pressure, and drying time to ensure they meet predetermined specifications.

• Documentation of the validation process is crucial for regula...read more

Maintaining HSO in lyophilized product involves proper storage conditions and packaging.

• Store the lyophilized product in a cool and dry environment to prevent moisture absorption.

• Use appropriate packaging materials that provide a barrier against moisture and oxygen.

• Ensure the lyophilized product is sealed tightly to prevent any exposure to air.

• Consider using desiccants or moisture-absorbing packets in the packaging.

• Per...read more