Nokia Interview Questions and Answers

Pump sizing calculations involve determining the required pump flow rate, head, and power consumption based on system requirements.

• Determine the required flow rate for the system

• Calculate the total head required to overcome system resistance

• Select a pump that can deliver the required flow rate at the calculated head

• Calculate the power consumption of the selected pump

• Consider factors such as efficiency, NPSH, and safety margins

• Iterate the calculations if necessary to optimize ...read more

NPSH is the measure of the pressure available to prevent cavitation in a pump.

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

• It is important to ensure that NPSH is greater than the NPSH required by the pump to avoid cavitation.

• Factors affecting NPSH include pump design, fluid properties, and operating conditions.

• NPSH can be calculated using specific formulas based on the pump system parameters.

Line sizing criteria include flow rate, pressure drop, velocity, material compatibility, and safety factors.

• Flow rate: Determine the maximum flow rate the line needs to handle.

• Pressure drop: Calculate the pressure drop along the line to ensure proper operation.

• Velocity: Select a velocity range to prevent erosion or excessive noise.

• Material compatibility: Choose materials that are compatible with the process fluid.

• Safety factors: Consider factors such as future expansion, main...read more

Safety valve selection criteria

• The type of fluid or gas being handled

• The pressure and temperature of the system

• The flow rate and capacity of the valve

• The set pressure and blowdown requirements

• The material compatibility with the process fluid

• The valve's reliability and maintenance requirements

I have 5 years of experience working in the oil and gas industry, specifically in process engineering roles.

• Designed and optimized processes for oil and gas production

• Implemented safety measures to ensure compliance with industry regulations

• Worked on projects involving refining, transportation, and storage of oil and gas

• Collaborated with cross-functional teams to improve efficiency and reduce costs