Petrofac Interview Questions, Process, and Tips

Saturated steam is steam that is in equilibrium with liquid water at the same temperature and pressure.

• Saturated steam is commonly used in industrial processes for heating and sterilization.

• It is often produced by boiling water in a closed vessel, such as a boiler.

• Saturated steam has a high heat content and can transfer heat efficiently.

• It is important to control the quality of saturated steam to prevent damage to equi...read more

I have experience in commissioning and operating various types of plants.

• I have worked with oil and gas plants, chemical plants, and power plants.

• I am familiar with the process of pre-commissioning, commissioning, and start-up of plants.

• I have experience in troubleshooting and resolving issues during plant operations.

• I am knowledgeable in safety procedures and regulations in plant operations.

• I have worked with various ...read more

Compressor startup procedures involve several steps to ensure safe and efficient operation.

• Check oil levels and pressure

• Inspect for leaks and damage

• Open suction and discharge valves

• Start motor and monitor for abnormal vibrations or sounds

• Gradually increase speed and monitor pressure and temperature

• Close bypass valve once operating conditions are stable

Delta D on steam line can be monitored using differential pressure transmitter.

• Install a differential pressure transmitter across the steam line.

• Calibrate the transmitter to measure the pressure difference between two points.

• Convert the pressure difference to delta D using the known properties of the fluid.

• Monitor the delta D reading regularly to detect any changes in the steam line.

• Take corrective actions if the delta

Equipment preservation can be achieved through proper maintenance and storage.

• Regular cleaning and inspection of equipment

• Proper lubrication and calibration

• Storing equipment in a dry and cool environment

• Using protective covers or cases

• Implementing a preventative maintenance schedule

• Training staff on proper handling and care of equipment

Stress critical line list is prepared by identifying lines that are critical for the safe operation of the plant.

• Identify lines that carry hazardous fluids or operate at high temperatures/pressures

• Determine the consequences of failure for each line

• Consider the location of the line and its accessibility for maintenance

• Prioritize the lines based on their criticality and assign appropriate stress limits

• Update the list reg...read more

Flange leakage can be detected by visual inspection, pressure testing, or using ultrasonic or acoustic emission techniques.

• Visual inspection involves checking for signs of leakage such as stains or discoloration around the flange.

• Pressure testing involves pressurizing the system and checking for any drop in pressure over time.

• Ultrasonic or acoustic emission techniques involve using sensors to detect any sound or vibrat...read more

Piping stress engineers ensure that piping systems are designed and installed correctly to prevent failure and ensure safety.

• Perform stress analysis on piping systems to ensure they can withstand expected loads and pressures

• Collaborate with other engineers and designers to ensure piping systems are properly integrated into overall project design

• Review and approve piping specifications and drawings

• Provide guidance on ma...read more

Bellow, spring and strut specs are made by considering the design requirements and selecting appropriate materials and dimensions.

• Understand the design requirements and operating conditions

• Select appropriate materials based on temperature, pressure, and corrosion resistance

• Determine the dimensions and geometry of the components

• Consider factors such as fatigue life, vibration, and thermal expansion

• Ensure compliance with...read more

Technical bid evaluation of special components requires attention to key points.

• Ensure compliance with project specifications and standards

• Verify material and manufacturing quality

• Evaluate supplier's experience and reputation

• Assess delivery schedule and logistics

• Consider cost and value for money

• Review documentation and certifications

• Perform technical analysis and simulations

• Identify potential risks and mitigation measu

Accepted values of vibration depend on the specific industry and application.

• Accepted values of vibration vary depending on the industry and application.

• In the automotive industry, acceptable vibration levels for vehicles may be specified by manufacturers.

• In the construction industry, acceptable vibration levels for heavy machinery may be regulated by safety standards.

• In the aerospace industry, acceptable vibration lev...read more

These are likely measurements of distance or size. More context is needed to provide a specific answer.

• Need more information to provide a specific answer

• Could be related to nanotechnology or semiconductor manufacturing

• May be referring to tolerances or specifications for a particular product or process