PCBL Chemical Limited Mechanical Technician Interview Questions and Answers

The number of gaskets in a floating head heat exchanger varies depending on the design and size of the exchanger.

• The number of gaskets is typically determined by the number of tube passes in the heat exchanger.

• Each tube pass may require multiple gaskets, depending on the design.

• The gaskets are used to create a seal between the floating head and the tube sheet.

• The number of gaskets can range from a few to several dozen,...read more

Heat exchangers are devices used to transfer heat between two or more fluids.

• Shell and tube heat exchanger

• Plate heat exchanger

• Fin tube heat exchanger

• Double pipe heat exchanger

• Spiral heat exchanger

• Regenerative heat exchanger

Dry gas seals are used in centrifugal compressors to prevent gas leakage and contamination.

• Prevents gas leakage in centrifugal compressors

• Helps in preventing contamination of process gas

• Used in high-pressure applications

• Requires a barrier gas to operate effectively

NPSH stands for Net Positive Suction Head and is a measure of the pressure available at the suction port of a pump to prevent cavitation.

• NPSH is important for ensuring that a pump does not cavitate, which can cause damage to the pump and reduce its efficiency.

• It is calculated by subtracting the vapor pressure of the liquid being pumped from the total suction head of the pump.

• NPSH is typically provided by the pump manuf...read more

The proactive maintenance philosophy should be followed to prevent breakdowns and maximize equipment reliability.

• Implement a preventive maintenance program to regularly inspect and maintain equipment

• Utilize predictive maintenance techniques such as vibration analysis or thermal imaging to identify potential issues before they occur

• Focus on reliability-centered maintenance to prioritize critical assets and optimize main...read more

Yes, I have extensive experience in turnaround maintenance in various industries.

• Managed turnaround maintenance projects for industrial equipment and machinery

• Coordinated with maintenance teams to ensure timely completion of tasks

• Implemented preventive maintenance strategies to minimize downtime

• Utilized advanced tools and technologies to optimize maintenance processes

• Tracked and analyzed maintenance data to improve eff