Oman Refinery Company Instrument Engineer Interview Questions, Process, and Tips

MOV (Metal Oxide Varistor) is used as a voltage protection device in electrical circuits.

• MOV is used to protect sensitive electronic devices from voltage surges or transients.

• It acts as a voltage-dependent resistor, limiting the voltage across the circuit.

• MOV absorbs excess voltage and diverts it away from the protected equipment.

• It has a high resistance at normal operating voltage and low resistance during voltage spi...read more

To troubleshoot S7 PLC, I use a combination of software and hardware tools. I also have designing knowledge.

• I use Siemens TIA Portal software to monitor and diagnose the PLC

• I check the hardware components such as power supply, communication modules, and I/O modules

• I use a multimeter to check the voltage and current levels

• I have knowledge of ladder logic programming and can identify errors in the code

• I also have experie...read more

A control valve is calibrated by adjusting its position to achieve the desired flow rate or pressure drop.

• Determine the desired flow rate or pressure drop

• Connect the valve to a calibration rig

• Adjust the valve position until the desired flow rate or pressure drop is achieved

• Record the valve position and corresponding flow rate or pressure drop

• Repeat the process at different setpoints to create a calibration curve

I can troubleshoot various control valves used in instrumentation engineering.

• I can troubleshoot globe valves, butterfly valves, ball valves, and plug valves.

• I am familiar with different types of actuators used in control valves such as pneumatic, hydraulic, and electric actuators.

• I can diagnose and fix issues related to valve positioners, solenoid valves, and valve controllers.

• I have experience troubleshooting control...read more

Yes, I have experience in Bently Nevada system.

• I have worked with Bently Nevada system for 3 years.

• I am familiar with the various components and functionalities of the system.

• I have successfully implemented Bently Nevada system in a project for monitoring and controlling industrial processes.

• I have conducted troubleshooting and maintenance tasks on Bently Nevada system.

• I have attended training sessions and workshops to...read more

The fire and gas protection system familiar to me is the Fire and Gas Detection System (FGDS).

• FGDS is designed to detect and mitigate the risks of fire and gas hazards in industrial facilities.

• It consists of various sensors, alarms, and control panels to monitor and respond to potential fire and gas incidents.

• The system can detect smoke, heat, gas leaks, and other hazardous conditions.

• Once a hazard is detected, the sys...read more