Preview Questions Instrumentation Engineer | Role Specific Skill

Question 1: How can you mitigate measurement errors due to temperature fluctuations when using a differential pressure flowmeter in a chemical plant?

Which action should you take?

Choose only one option

By recalibrating the flowmeter every few hours

By compensating for temperature variations using a thermal compensation circuit

By using an ultrasonic sensor to measure the flow

By isolating the pressure transmitter from temperature changes

Question 2: In a chemical process, how does a fiber optic sensor work to measure parameters like temperature or pressure?

Which action should you take?

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It uses light to measure the physical properties by detecting the amount of light reflected back

It measures the changes in the refractive index of light within the fiber

It directly measures resistance changes within the fiber material

It uses magnetic fields to detect changes in sensor properties

Question 3: Which of the following calibration techniques is most suitable for a coriolis flow meter used in chemical applications?

Which action should you take?

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Electrical offset calibration

Static volume calibration

Deadweight tester method

Mass flow calibration using a certified flow standard

Question 4: In PLC programming, what is the primary function of an "input module" in a petrochemical process control system?

Which action should you take?

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To convert analog signals to digital form for processing

To monitor the operational status of the PLC

To control the output based on the processed inputs

To provide power to field instruments

Question 5: Why is redundancy important when designing PLC systems for critical chemical processes?

Which action should you take?

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It makes troubleshooting more difficult by introducing multiple PLCs

It increases the complexity of the program without adding value

It limits the control to one PLC, reducing the chances of failure

It ensures continued operation in the event of a hardware or software failure, improving system reliability

Question 6: When designing control systems for hazardous areas in chemical plants, what is the key consideration in selecting equipment?

Which action should you take?

Choose only one option

Size and weight of the equipment

Compliance with explosion-proof standards and certifications

Ease of installation

Cost of equipment