Deep Industries Interview Questions and Answers

Relief valves are of two types - pressure relief valves and safety relief valves. Their size is calculated based on the flow rate and pressure.

• Pressure relief valves are used to protect equipment from overpressure and are typically set at a specific pressure level.

• Safety relief valves are used as a last line of defense and are typically set at a higher pressure level than pressure relief valves.

• The size of a relief valve is calculated based on the flow rate and pressure that ...read more

Line sizing is calculated based on the flow rate, pressure drop, and fluid properties.

• Determine the required flow rate for the process

• Calculate the pressure drop based on the length of the line and the fluid properties

• Select a pipe size that can handle the required flow rate and pressure drop

• Consider factors such as corrosion, erosion, and velocity limitations

• Use industry standards and guidelines for pipe sizing

• Perform iterative calculations to optimize the line size

• Examples ...read more

Cavitation in pumps can be troubleshooted by identifying the root cause and taking corrective actions.

• Check for low suction pressure or high discharge pressure

• Inspect the impeller and casing for damage or wear

• Ensure proper alignment of the pump and motor

• Verify that the pump is properly primed

• Consider changing the pump design or increasing the size of the suction pipe

• Install a cavitation eliminator or inducer

• Monitor the pump performance regularly to detect any issues early on

NPSH Available is the amount of fluid pressure available at the suction of a pump.

• NPSH Available is the difference between the absolute pressure at the suction of the pump and the vapor pressure of the fluid being pumped.

• It is important to ensure that the NPSH Available is greater than the NPSH Required for the pump to avoid cavitation.

• NPSH Available can be increased by increasing the pressure at the suction of the pump or by decreasing the temperature of the fluid being pump...read more