ExxonMobil Instrument Engineer Interview Questions and Answers

Q1. Basic knowledge of instrumentation ?
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Q2. Oil & Gas standards and basic ideas of instrumentation loop ?
Ans. 
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
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Q3. Process variable and control system?
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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
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Q4. Basic knowledge of distributed control system ?
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Q5. Tag configuration and logic configuration, loop configuration of DCS
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Q6. Knowledge of foundation field Bus?
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Q1. Trabalshoting RTU VFD and FT, PT TT
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Q2. PLC related questions
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Q3. Programin related questions
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Q4. Scada related any questions
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Q5. Emarson plc trabalshoting CPU radio configuration question
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Q6. Tubing fitting size and installation work
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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
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Q7. Instrument calibration PT, FT, LT, TT, ETC..
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Q1. They will ask technical questions from your resume but want answer as like their plant.
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Q2. What is the control valve and their part names.
Ans. 
Control valves are devices used to regulate the flow of fluids in a system by varying the size of the flow passage.
• Control valves have various parts including valve body, actuator, positioner, and valve trim.

• Valve body is the main part of the control valve that houses the internal components.

• Actuator is responsible for moving the valve plug to control the flow.

• Positioner ensures the valve plug is in the correct positio...read more
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Q1. A lot of deduction from salary structure. For example if you got 10.5 LPA CTC then you will get only 7.0 LPA in hand. And decuted salary is not sure you will.
Ans. 
Salary deductions are common in CTC structures due to various components like PF, gratuity, taxes, etc.
• CTC includes various components like basic salary, HRA, PF, gratuity, etc.

• Deductions are made for PF, professional tax, income tax, etc.

• Net salary received is after deducting these components.

• Employers may also offer additional benefits like insurance, bonuses, etc.
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Q1. Regarding maintenance of the insrtument
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Q2. Mentioned Standard maintenance procedure for instruments
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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
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Q1. Basic questions of java.
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Q1. Intro and other hr related questions.
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Entry level aptitude test

Q1. Introduction and about college project.
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