ExxonMobil Instrument Engineer Interview Questions and Answers

Electromagnetic flowmeter measures flow rate by using Faraday's law of electromagnetic induction.

• Electromagnetic flowmeter is based on the principle of Faraday's law of electromagnetic induction.

• It consists of a flow tube, electrodes, and a magnetic field.

• When a conductive fluid flows through the flow tube, it generates a voltage proportional to the flow rate.

• The electrodes detect the voltage and the magnetic field ens...read more

Interacting systems have feedback loops and can influence each other's behavior, while non-interacting systems operate independently.

• Interacting systems have mutual dependencies and can affect each other's inputs, outputs, or behavior.

• Non-interacting systems operate independently and do not have any influence on each other.

• Interacting systems often involve feedback loops where the output of one system affects the input...read more

Standard maintenance procedures for instruments involve regular inspections, calibrations, and repairs to ensure optimal performance.

• Regularly inspect instruments for any signs of wear or damage

• Calibrate instruments according to manufacturer's guidelines

• Perform routine maintenance tasks such as cleaning and lubricating

• Keep detailed records of maintenance activities for each instrument

• Train staff on proper instrument ma...read more

Yes, I have worked with Vibration Monitoring Systems.

• I have experience in installing and configuring vibration monitoring systems.

• I have conducted regular inspections and maintenance of vibration monitoring equipment.

• I have analyzed vibration data to identify potential issues and recommend corrective actions.

• I have worked with various types of vibration sensors and transducers.

• I have collaborated with other engineers a...read more

Control valves can be classified into different types based on their design and function.

• Globe valves

• Butterfly valves

• Ball valves

• Diaphragm valves

• Needle valves

• Gate valves

• Check valves

• Pressure relief valves

Tubing fitting size and installation work

• The tubing fitting size should match the size of the tubing being used

• Proper installation techniques should be followed to ensure a secure and leak-free connection

• Common types of tubing fittings include compression, flare, and push-to-connect fittings

Oil & Gas standards and instrumentation loop basics.

• Oil & Gas industry follows various standards like API, ISO, etc.

• Instrumentation loop is a closed circuit of sensors, transmitters, controllers, and final control elements.

• It is used to measure and control process variables like temperature, pressure, flow, etc.

• The loop can be either analog or digital and can be configured in various ways like 2-wire, 3-wire, 4-wire, e...read more

Process variable is the measured parameter in a system, while control system is the mechanism used to regulate the process variable.

• Process variable is the input to the control system

• Control system uses feedback to adjust the process variable

• Examples of process variables include temperature, pressure, flow rate

• Examples of control systems include PID controllers, PLCs, DCSs