Accruval Technologies Interview Questions and Answers

P/V ratio and tip speed impact scale-up selection in process engineering.

• P/V ratio affects the level of shear stress in the system, influencing mixing and reaction rates.

• Higher tip speeds can lead to increased shear forces and heat generation, impacting product quality.

• Selection criteria include desired mixing intensity, heat transfer requirements, and shear sensitivity of the product.

• For example, in pharmaceutical manufacturing, a lower P/V ratio may be preferred for shear-s...read more

Tip speed is the speed at the outer edge of a rotating object, calculated by multiplying the radius by the angular velocity.

• Tip speed is the speed at the outer edge of a rotating object.

• It is calculated by multiplying the radius of the object by the angular velocity.

• In the laboratory, tip speed can be calculated using the formula: Tip Speed = 2 * π * Radius * RPM.

• In the pilot plant, the same formula can be used to calculate tip speed, but with the actual values of radius and ...read more

Heat transfer is the movement of heat from one place to another, while mass transfer is the movement of mass from one place to another. Both are important in various engineering processes.

• Heat transfer involves conduction, convection, and radiation.

• Mass transfer involves diffusion, convection, and molecular diffusion.

• Significance of heat transfer includes maintaining temperature in chemical reactors, HVAC systems, etc.

• Significance of mass transfer includes separation processe...read more

Calculations include scale-up factors, equipment sizing, material compatibility, process optimization, and cost analysis.

• Determine scale-up factors to ensure the lab process can be replicated in the plant

• Size equipment appropriately for the larger scale production

• Check material compatibility with plant equipment and process conditions

• Optimize the process parameters for efficiency and quality

• Conduct cost analysis to determine the feasibility of production at scale

I have taken various actions in troubleshooting, including analyzing data, conducting experiments, and collaborating with team members.

• Analyze data to identify potential issues

• Conduct experiments to test hypotheses

• Collaborate with team members to brainstorm solutions

• Utilize problem-solving skills to troubleshoot complex problems

HAZOP stands for Hazard and Operability Study, a systematic method to identify potential hazards and operability issues in a process.

• HAZOP is a structured and systematic examination of a process to identify potential hazards and operability issues.

• It involves a team of experts analyzing the process step by step to identify deviations from the design intent.

• The team uses guide words such as 'no', 'more', 'less', 'as well as' to brainstorm potential deviations and their consequ...read more

Power Number and Flow Number are dimensionless numbers used in fluid mechanics to characterize the flow behavior of fluids in different systems.

• Power Number is a dimensionless number used to characterize the power consumption in a mixing system. It is defined as the ratio of the power input to the fluid to the product of the impeller speed, impeller diameter, and fluid density.

• Flow Number is a dimensionless number used to characterize the flow behavior of fluids in a mixing s...read more