Doha Petroleum Construction Company Instrumentation Technician Interview Questions and Answers

Q1. How much you earn
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Q1. How many years experience?
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Q2. What is tha qualification?
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The qualification for an Instrumentation Technician typically includes a degree or diploma in instrumentation technology or a related field.
• A degree or diploma in instrumentation technology or a related field is usually required.

• Knowledge of electrical and electronic systems is important.

• Experience with calibration and troubleshooting of instruments is often necessary.

• Familiarity with industry standards and regulations...read more
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Q3. Is currently working?
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Q4. Before working company
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Q1. What is Thermocouple range?
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Thermocouple range refers to the temperature range within which a thermocouple can accurately measure temperature.
• Thermocouple range varies depending on the type of thermocouple used.

• Common thermocouple types include J, K, T, E, and N.

• For example, a type K thermocouple has a range of -200 to 1350 degrees Celsius.

• It is important to select the appropriate thermocouple type for the temperature range being measured.
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Q2. What is anti surge valve?
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An anti-surge valve is a control valve used in a compressor system to prevent surge and maintain stable operation.
• An anti-surge valve is typically installed in the discharge line of a compressor.

• It is designed to protect the compressor from surge, which is a phenomenon of unstable flow and pressure that can cause damage to the compressor.

• The valve opens or closes based on the compressor's operating conditions to mainta...read more
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Q3. Are you working gas turbine?
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Yes, I have experience working with gas turbines.
• I have worked with gas turbines in my previous job as an instrumentation technician.

• I am familiar with the maintenance and troubleshooting of gas turbines.

• I have experience in calibrating and testing gas turbine sensors and instruments.

• I have knowledge of the safety protocols and regulations related to gas turbines.
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Q4. How many types vibration is there in field?
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There are three types of vibration in the field: axial, radial, and tangential.
• Axial vibration occurs parallel to the axis of rotation.

• Radial vibration occurs perpendicular to the axis of rotation.

• Tangential vibration occurs at a right angle to both axial and radial vibration.

• Vibration analysis is used to detect and diagnose problems in rotating machinery.

• Excessive vibration can lead to premature failure of bearings, g
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Q5. Are you know that preventive maintenance jobs?
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Yes, I am familiar with preventive maintenance jobs.
• Preventive maintenance involves regularly scheduled inspections, cleaning, and repairs to prevent equipment breakdowns.

• I have experience performing preventive maintenance on various types of instrumentation equipment, such as calibrators, transmitters, and controllers.

• Examples of preventive maintenance tasks I have performed include checking for leaks, replacing worn ...read more
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Q1. Are you instrument technician?
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Q2. What kind of precautions need in Plant running time?
Ans. 
Precautions are necessary to ensure safe and efficient plant operation.
• Regular maintenance of equipment and machinery

• Proper training and certification of personnel

• Strict adherence to safety protocols and procedures

• Regular inspections and audits to identify potential hazards

• Effective communication and coordination among team members

• Use of personal protective equipment (PPE) as required

• Emergency response planning and dri...read more
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I am interested to work in maintenance field and troubleshooting

Q1. What is a Transmitter, types/functions and general configuration/calibrations
Ans. 
A transmitter is a device that converts a signal from a sensor into a standardized output signal for measurement or control purposes.
• Types of transmitters include pressure transmitters, temperature transmitters, level transmitters, and flow transmitters.

• Functions of transmitters include sensing a physical parameter, converting it into an electrical signal, and transmitting the signal to a control system.

• General configu...read more
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Q1. Types of Instruments
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Instruments used in control and instrumentation include sensors, transmitters, controllers, and actuators.
• Sensors: devices that detect changes in physical properties and convert them into electrical signals (e.g. temperature sensors, pressure sensors)

• Transmitters: devices that send signals from sensors to controllers (e.g. signal transmitters)

• Controllers: devices that receive signals from sensors and transmitters to re...read more
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Q2. PID loop working in Complete
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PID loop is a control system feedback mechanism used in industrial processes to maintain desired setpoints.
• PID stands for Proportional, Integral, Derivative

• Proportional term responds to the current error

• Integral term corrects past errors

• Derivative term predicts future errors

• PID controller continuously calculates an error value as the difference between a desired setpoint and a measured process variable

• Example: PID loop...read more
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Q1. Ladder Logics creation
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Q2. Lots of DCS questions.
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Q1. General technical questions from Resume
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Q1. Sizing and equipment selection
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Q1. Situational based questions.
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Q1. Instrument Technician
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Q2. Personal Details
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Q1. How much you earn
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