Instrumentation interview questions

1. What is the purpose of an inclined manometer? It is used to increase the instrument’s scale. Because the manometer is angled with respect to the vertical. 2. What is the output range of transmitter? 4 -20 ma or 0-10 V 3. What is the drift? Changes that occurred in the instrument calibration are called …

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1. What is the definition of a gas’s thermal conductivity? The quantity of heat (in calories) transferred in unit time (seconds) in a gas between two surfaces 1 cm2 in area when the temperature difference between the surfaces is 1oC is defined as thermal conductivity. 2. Define the term “humidity” It is the amount of …

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1. What are leveltrol’s limitations? A leveltrol’s limitations are that it cannot be used for lengths longer than 72 inches. 2. How will you check the zero of a level D.P. transmitter while it is in operation? a. Close the isolation valves on both sides. b. Open the vent valves on the L.P. and H.P. …

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1. What exactly is a SCADA network? Supervisory control and data acquisition is an abbreviation for a computer system that collects and analyses real-time data. SCADA systems are used to monitor and control industrial machinery. 2. Define Supervisory Control? Supervised control is a catch-all term for the control of a large number of individual controllers …

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1. What is RTD? RTDs (Resistance Temperature Detector) are temperature detectors whose resistance changes as the temperature rises. RTDs are used for continuous temperature measurement and have a positive temperature coefficient. When the temperature rises, the resistance of the RTD decreases. Advantages of RTD: 1). More accurate 2). Linear output 3). High sensitivity Disadvantages of RTD: …

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1.Define Instrumentation Engineering? Instrumentation engineering is a branch of engineering that focuses on the principles and operation of measuring instruments used in the design and configuration of automated systems in the electrical, pneumatic, and other domains. 2. What is the job of an Instrumentation Engineer?  The required tasks vary greatly depending on the domain; instrumentation …

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