Petrofac Mechanical Maintenance Supervisor Interview Questions, Process, and Tips

Reciprocating compressor 1st stage pressure increase - reason and troubleshooting

• Possible reasons: clogged suction filter, worn out piston rings, valve failure, incorrect valve timing, inadequate lubrication

• Troubleshooting steps: check suction filter, inspect piston rings and valves, adjust valve timing, ensure proper lubrication

• If issue persists, consult manufacturer's manual or seek professional help

Different types of pumps and their parts with sectional drawings.

• Centrifugal pumps have impellers, volutes, and shafts.

• Positive displacement pumps have gears, lobes, and vanes.

• Diaphragm pumps have diaphragms, check valves, and ball valves.

• Sectional drawings show the internal parts of a pump.

• Pumps can be classified based on their application, such as water pumps, fuel pumps, and chemical pumps.

Alignment of pump and driver coupling is crucial for efficient operation and to prevent damage.

• Proper alignment ensures smooth power transmission between the pump and driver.

• Misalignment can lead to excessive vibration, premature wear, and reduced efficiency.

• Alignment can be achieved through various methods such as laser alignment or dial indicators.

• Alignment should be checked regularly and adjusted if necessary.

• Exampl...read more

DBS in coupling refers to the distance between the two shafts.

• DBS stands for Distance Between Shafts.

• It is the distance between the two shafts in a coupling.

• It is an important parameter to consider while selecting a coupling.

• The DBS value is usually provided by the coupling manufacturer.

• It helps in ensuring proper alignment and avoiding misalignment issues.