Avisan Engineering Enterprises Interview Questions and Answers

The pump will observe both kerosene and water being pumped together.

• The pump will not be able to differentiate between the two liquids

• Both liquids will be pumped together in the same flow

• The mixture of kerosene and water may cause issues in downstream processes

• Separation techniques such as gravity settling or centrifugation may be required to separate the two liquids

To enhance flow by twice, pipe diameter needs to be increased by factor of 1.19 and velocity needs to be reduced by half.

• Increase pipe diameter by factor of 1.19

• Reduce velocity by half

• Consider the fluid properties and pressure drop

• Ensure the pipe material can handle the increased flow

• Check for any potential blockages or obstructions in the pipeline

Slight increase in distillation column pressure without flooding will not affect separation

• Slight increase in pressure does not cause flooding which is the main factor affecting separation

• Separation efficiency may decrease slightly but not significantly

• Factors like temperature, feed rate, and composition also affect separation

H2 will have more pressure drop than N2 for 100 kg/hr

• H2 has a smaller molecular size than N2

• Higher flow rate leads to higher pressure drop

• This phenomenon is commonly observed in gas pipelines

Line size calculation depends on flow rate, fluid properties, and pressure drop.

• Determine the required flow rate

• Determine the fluid properties such as viscosity and density

• Calculate the pressure drop based on the length of the line and the fittings used

• Select a line size that can handle the required flow rate with an acceptable pressure drop

• Consider factors such as cost and space limitations

• Use industry standards and guidelines for reference

• Perform simulations and testing if ...read more

Velocity change affects flow in a venturimeter.

• As velocity increases, pressure decreases and vice versa.

• Flow rate is directly proportional to the square root of pressure difference.

• Venturimeter is used to measure flow rate in pipes.

• Flow rate can be calculated using Bernoulli's equation.

PFR is better for zero order reaction as it maintains constant concentration throughout the reactor.

• PFR maintains constant concentration throughout the reactor

• CSTR may result in concentration gradients

• PFR is more efficient for zero order reactions

• CSTR may be more suitable for reactions with changing rate constants