Assistant Chemical Engineer Interview Questions and Answers

To de-pressurise a vessel, slowly release the pressure by opening the vent or relief valve.

• Slowly release the pressure by opening the vent or relief valve

• Ensure proper safety measures are in place before de-pressurising

• Monitor the pressure gauge to ensure pressure is decreasing

• Wait for the pressure to reach desired level before fully opening the vessel

A relief device is designed by considering the process conditions, fluid properties, and applicable codes and standards.

• Identify the process conditions such as maximum allowable working pressure (MAWP) and temperature.

• Determine the fluid properties including flow rate, density, and viscosity.

• Select the appropriate relief device type based on the process conditions and fluid properties (e.g. pressure relief valve, rupture disk).

• Calculate the required relieving capacity to prot...read more

Instruments commonly used in designing include CAD software, 3D printers, and simulation tools.

• CAD software (Computer-Aided Design) for creating detailed 2D and 3D models

• 3D printers for rapid prototyping and creating physical models

• Simulation tools for testing designs in virtual environments before production

Pump curves show the relationship between flow rate, head, and power for a specific pump.

• Pump curves are graphical representations of a pump's performance characteristics.

• They show the relationship between flow rate, head (pressure), and power consumption.

• Pump curves help engineers select the right pump for a specific application.

• They are typically provided by pump manufacturers and used for pump sizing and selection.

• An example of a pump curve would show how the flow rate dec...read more