Introduction Bourdon tube uses a coiled tube which as it expands due to pressure increase causes a rotation of an arm connected to the tube Working principle The pressure sensing element is a closed coiled tube connected to the chamber or pipe in which pressure is to be sensed. As the gauge pressure increases the tube will tend …
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: …
300+ Instrumentation Engineering Interview Questions – Part 2 Read More »
1. Explain the working principle of the variable inductance type transducer? A. The working principle of the variable inductance type transducer is based on the variation of self-inductance, variation of the mutual inductance, and also due to the production of the eddy currents. 2. What is an active and passive transducer? A. The active transducer …
1. How to select a proper flange facing? A. The selection of a proper flange facing is depended on certain factors like flange material. Gasket material, Bolt strength, operating pressure, and temperature, and also fluid properties contained. 2. What is a flange? A. A flange is a mechanical connection with two pipes, basically, it connects …
A diaphragm is a material that would be elastic and if we apply pressure to this then it would displace. This type of pressure gauge would use the elastic property of the diaphragm to determine the difference between reference pressure and unknown pressure. The operating principle of this device is the same as the bourdon …
1.What are the major functions of a supervisory control system? A. There are three major functions for a supervisory control systems and they are Set point generation Process monitoring Operator interface 2.Explain automation ? A. Automation is a process that can reduce human efforts, we can see the use of automation in many industrial applications. …
What is Pressure The pressure is the ratio of force to the area over which that force is distributed, it is the force per unit area applied in a direction perpendicular to the surface of an object. An action of one force against another force can be called as pressure, the pressure is force applied …
Pressure measurement and types of pressure measurement Read More »
Hey guys without any further a due Here are the 43 interview questions about Piping/instrumentation 1.What are instrument categories? Ans: General, flow, temperature, pressure, level, density.etc. 2.Which instruments are handled by piping department ? Ans: flame arrestor, breather valve. 3.What are basic functions of instruments? Ans: To sense, transmit, indicate, read and control. 4.Why block valve is …
43 TOP PIPING/INSTRUMENTATION INTERVIEW QUESTIONS Read More »
What is Process control? A process control is continuous changing of a process variable to desire variable according to the measured feedback variable from the process. A Process control system always aim to achieve a process variable at the desired quantity, so that the system is said to be in controlled What is transmitter? A transmitter is …
Introduction For the purposes of this section, we will define high-pressure instruments as devices that are capable of measuring pressures in excess of 10,000 to 20,000 PSIG (700 to 1,400 bars) One might group these sensors by other characteristics, such as: 1. Mechanical, such as pressure repeaters, helical bourdon tubes, or dead weight testers 2. …
