Instrumentation and Control Engineering Interview Question and Answers 1. What Is Instrumentation Control? Answer: In addition to measuring field parameters, instrumentation is also responsible for providing the ability to modify some field parameters. Some examples include :- Device Field Parameter(s) Valve Flow, Pressure Relay Voltage, Current Solenoid Physical Location, Level Circuit breaker Voltage, Current. 2. What Is Instrumentation Engineering? Answer: Instrumentation engineering is the engineering specialization focused on the principle and operation of measuring instruments which are used in design and configuration of automated systems in electrical, pneumatic domains etc. They typically work for industries with automated processes, such as chemical or manufacturing plants, with the goal of improving system productivity, reliability, safety, optimization and stability. Read also:- Instrumentation and control engineering   3. What Is Instrumentation? Answer: The technolo

  Project Management Multiple Choice Questions and Answers  1. Developing a technology is an example of a) Process b) Project c) Scope d) All of the above Answer: Project 2. A ____ is a set of activities which are networked in an order and aimed towards achieving the goals of a project. a) Project b) Process c) Project management d) Project cycle Answer: Project 3. Resorce requirement in project becomes constant while the project is in its _____ progress stage. a) 40 to 55% b) 55 to 70% c) 70 to 80% d) 80 to 95% Answer: 80 to 95% 4. Project performance consists of a) Time b) Cost c) Quality d) All of the above Answer: All of the above 5. Following is(are) the responsibility(ies) of the project manager. a) Budgeting and cost control b) Allocating resources c) Tracking project expenditure d) All of the above Answer: All of the above 6. Resources refers to a) Manpower b) Machinery c) Materials d) All of the above Answer: All of the above 7. The project life cycle consists of a) Understand

  Stepper Motor Introduction The motor which moves in discrete steps is known as the stepper motor. A stepper motor is an electromechanical device it converts electrical power into mechanical power. Also, it is a brushless, synchronous electric motor that can divide a full rotation into an expansive number of steps. Stepper motors operate differently from DC brush motors, which rotate when voltage is applied to their terminals. Stepper motors, on the other hand, effectively have multiple toothed electromagnets arranged around a central gear-shaped piece of iron. The electromagnets are energized by an external control circuit, for example, a microcontroller. The motor’s position can be controlled accurately without any feedback mechanism, as long as the motor is carefully sized to the application. Stepper motors are similar to switched reluctance motors. The stepper motor uses the theory of operation for magnets to make the motor shaft turn a precise distance when a pulse of electrici

  Process Control Multiple Choice Questions 1. Which of the following parameters is not useful in the construction of pressure bellows? a) Hysteresis b) Sensitive to changing pressures c) Corrosion d) pH Answer: pH 2. Who invented the Bourdon tube? a) Eugene b) Howe c) Flynn d) Royce Answer: Eugene 3. Which of the following is a desirable characteristic of an instrument ? a) High fidelity b) High drift c) Poor reproducibility d) High measuring lag Answer: High fidelity 4. Thermistor, which has high temperature co-efficient of resistivity, is used as the sensing element in resistance thermometer. It is a/an a) insulator b) conductor c) solid semi-conductor d) liquid semi-conductor Answer: solid semi-conductor 5. Which of the following temperature measuring instruments need not touch the object whose temperature is being measured ? a) Thermo electric pyrometer b) Mercury in glass thermometer c) Filled system thermometer d) Radiation/infrared pyrometer Answer: Radiation/infrared pyrometer

  Temperature Measurement Multiple Choice Questions 1. Reference junction compensation is necessary in thermocouple-based temperature instruments because ___________  a) Copper extension wire has a tendency to corrode b) Thermocouples are inherently nonlinear c) The reference junction generates a temperature-dependent voltage d) The junction’s electrical resistance varies with temperature Answer: The reference junction generates a temperature-dependent voltage 2. Which of the following is made up of mixtures of pure oxides of iron and nickel? a) Thermistors b) Mercury thermometers c) Radiation thermometers d) Metallic thermometers Answer: Thermistors 3. The heat control at large-scale in the fermenter is carried out by _________ a) Inter heating coils b) Heating jacket c) Controlled bath d) Cold-water circulation Answer: Cold-water circulation 4. The negative lead of a thermocouple is always colored a) Blue b) Yellow c) Red d) White Answer: Red 5. The resistance _________ with increase

  Working of Hydraulic Actuator The figure below represents the schematic representation of the hydraulic actuator. The major component of the unit is pilot valve also known as spool valve and main cylinder (or power cylinder). It operates in a way that difference in pressure created at the two regions of the main cylinder leads to the occurrence of translational motion of the piston. Let us see the functioning of the hydraulic linear actuator is main cylinder has two regions. These two regions are obtained by dividing the main cylinder with a main piston. Thus, there are two chambers of the main cylinder. The rate with which the fluid flows inside the cylinder is controlled by the spool valve. The spool valve has 4 ports and each port is connected to a different part of the system. Two separate ports are connected to the fluid supply and drain region respectively. While the other two ports are connected separately to the two chambers of the main cylinder. Initially, the spool is prese

Ultrasonic Flow Meter Working Animation

  Level Measurement Multiple Choice Questions 1. Which of the following devices are used for a level to force conversion? a) Load cell b) Membrane c) Diaphragm d) Voltmeter Answer: Load cell 2. If the specific gravity of the liquid inside the vessel increases, what aspects of the transmitter’s calibration will we need to change in order to maintain accurate liquid level measurement? a) We will need to change the transmitter’s LRV and linearity b) We will need to change the transmitter’s linearity and span c) We will need to change the transmitter’s LRV and URV d) We will need to change the transmitter’s linearity and zero Answer : We will need to change the transmitter’s LRV and URV 3. Suppose a storage vessel holds a liquid of unpredictable density. Identify which level measurement technology will not maintain accurate measurement of liquid height in the vessel as the liquid density changes a) Differential pressure transmitter b) Guided-wave radar c) Ultrasonic d) Float and tape Answe