Schlumberger Instrumentation Designer Interview Questions and Answers

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
Ans. 
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. How much you earn
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Q1. How many years experience?
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Q2. What is tha qualification?
Ans. 
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?
Ans. 
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?
Ans. 
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?
Ans. 
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

Good technical questions After that group discussion on social subject, technical and hr round

Group discussion on social subject

Q1. Good technical round with basic knowledge
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Q2. Field instrumentation working principle Standard and codes using in industry
Ans. 
Field instrumentation measures and controls process variables using sensors and transmitters. Industry standards and codes ensure safety and reliability.
• Field instrumentation uses sensors and transmitters to measure and control process variables such as temperature, pressure, flow, and level.

• Industry standards and codes ensure safety and reliability of instrumentation systems.

• Examples of standards and codes include ISA...read more
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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. What will you do if i give you to handle a project...
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Q1. What are your salary expectations?
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Q2. Why should we hire you?
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Q3. Tell me about yourself.
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Q1. Question about selection instrument for hazardous area, and it's classification
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