This change in resistance of the strain gauge becomes a measure of the extent to which the structure is strained and a measure of the applied force when calibrated. The unbonded strain gauge can measure the very small motion of the order of 50, μm and very small forces. Which of the following is a practical application of Strain Gauge: Given below are practical application of Strain Gauges. What is Strain? One B. Strain-gauge - MCQs with answers 1. Introduction to Metrology, Linear and Angular Measurement; 1. Commonly used elements for wire strain gauges are __________ Resistance value B. The main purpose of a strain gauge is to indirectly determine stress and its variation with time, quantitatively. The last fabrication step is then to hermetically seal the device to protect it against external mechanical and chemical damages. Therefore, to measure the strain requires accurate measurement of very small changes in resistance. MCQ ON DISPLACEMENT MEASUREMENT,STRAIN MEASUREMENT,MEASUREMENT OF ANGULAR VELOCITY,ACCELERATION MEASUREMENT. Measurement of Screw Thread and Gear; 4. Strain Gauge MCQ. A. Please choose suitable Keywords Ex: question, poll. 0.2% . ANSWER: D. Four . b) 2 types They can be manufactured to very small sizes. This involves the steps of cleaning, smoothing, roughening, and marking. Please type your E-Mail. If the displacement is measured with strain gauge then the number of strain gauge normally required are A. The basic hole drilling procedure involves drilling a small hole into the surface of a component, at the centre of a special strain gauge rosette and measuring the relieved strains. The RY strain gauge rosettes have three measuring grids for analyzing biaxial stress states with unknown principle directions. Measurement Computing • 10 Commerce Way • Norton, MA 02766 • (508) 946-5100 • info@mccdaq.com • mccdaq.com An MCC strain gage module uses a Kelvin connection to measure and regulate the voltage at the bridge. In case of required maintenance, they can signal a warning. your electrical guide . View Answer, 10. MCQ . For better results a strain gauge should have low. strain gauge transducers usually employ four strain gauge elements that are electrically connected to form a Wheatstone bridge circuit. How is the Poisson's ratio expressed for a wire in terms of assorted directions? Join our social networks below and stay updated with latest contests, videos, internships and jobs! This set of Electrical Measurements & Measuring Instruments Multiple Choice Questions & Answers (MCQs) focuses on “Operation of Strain Gauges”. Strain Gage Rosettes: Selection, Application and Data Reduction t e c H n o t e Strain Gages and Instruments tech note tn-515 For technical support, contact micro-measurements@vishay.com www.vishaymg.com 151 revision 25-mar-08 1.0 Introduction A strain gage rosette is, by definition, an arrangement of two or more closely positioned gage grids, separately oriented to measure the normal … The Change in the output of sensor with a change in input is known as, Thermistor MCQ – Thermistor Multiple Choice Questions with Answers, Which of the following is not an analog sensor, Mobile Phone Sensors MCQ – Multiple Choice Questions on Sensors used in Phones, Equivalent Resistance Multiple Choice Questions [MCQ] – Series and Parallel Circuits, ΔR is the change in resistance caused by strain, Adding a parallel resistor to one or more of the gauge arms, Bridges are often installed with a gauge that detects wind speed and its strain on bridge cables, In railways, a strain gauge is employed for measuring strain on rails. I'm working on a side project with my dad to measure the tension force being applied to the cables supporting a swing in our backyard. This category only includes cookies that ensures basic functionalities and security features of the website. The gauge is attached to the object by a suitable adhesive, such as cyanoacrylate. c) µ = –\(\frac{d}{\Delta l/l}\) Note that non-bonded strain gauges also exist, but their use is not as prevalent. This set of Electrical Measurements & Measuring Instruments Multiple Choice Questions & Answers (MCQs) focuses on “Operation of Strain Gauges”. These short objective type questions with answers are very important for Board exams as well as competitive exams. They can be manufactured to very small sizes. A strain gauge rosette is a term for an arrangement of two or more strain gauges that are positioned closely to measure strains along different directions of the component under evaluation. Facebook Strain is the ratio of the change in length of a material to the original, unaffected length. A strain gauge (also spelled strain gage) is a device used to measure strain on an object. This website uses cookies to improve your experience while you navigate through the website. Bonded strain gauge fabrication involves attaching a length of a conductive strip to a thin backing. Sanfoundry Global Education & Learning Series – Electrical Measurements. 1. These strain gauges are used to measure the normal strain in those three directions. a) True Free download in PDF Electronics and Instrumentation Multiple Choice Questions(MCQs) & Answers for competitive exams. 2. a) nickel and copper Electrical Engineering MCQ [ hide] 1 Which parameter of a strain gauge varies with applied force. It supplies the voltage to the strain gage with one pair of … 5 Unequal impedance of the four gauge arms can be best compensated by. Adding a parallel resistor to one or more of the gauge arms. d) silver and aluminium When an object deforms within the limit of elasticity, either it becomes narrower and longer or it become shorter and broadens. A strain gauge with high sensitivity and high gauge factor is Which of the following statement is correct? Q1) The detectors used in optical sensors is. a) 1 to 1.5 b) 1.5 to 2 c) 0.5 to 1 d) 5 to 10 Ans: (b) 229. b) stress One way of validating a math model is to use a strain gage measurement system to measure the strain at the surface of a structure. C. 90 0 to the shaft axis. Keywords: instrumentation, strain gauge, uncertainty 1 INTRODUCTION Strain gauges are one of the tools most often used in strain measurement owing to their apparent accu- Strain measurement involves a very small quantity (a few 푚휀) Therefore to measure strain, requires accurate measurement of a very small change of resistance. Definition: Strain gauge is a device which is when subjected to some force results change in resistance of the material. Question Title* Q2. a) S = \(\frac{\Delta R/R}{\Delta l}\) View Answer, 4. The sensitivity factor of strain gauges is normally of the order of. Measurement of Pressure, Flow, Temperature and Liquid Level. c) 6 types That is, if strain gauges are attached to the container subjected to the applied pressure, the strain guages also will change in dimension depending on the expansion or contraction of the container. Proper functioning of a strain gauge depends on __________ Alternatively, strain gauge conductors may be thin strips of the metallic film deposited on a nonconducting substrate material called the carrier. Put Video ID here: https://www.youtube.com/watch?v=sdUUx5FdySs Ex: "sdUUx5FdySs". c. Laser. d) length of wire Q3. b. Phototransistors. c) nickel cadmium alloy Fundamentals of CAM; 2. A strain gauge (also spelled strain gage) is a device used to measure strain on an object. As such, further developments also involve metal foil gauges. View Answer, 8. 1. You also have the option to opt-out of these cookies. Two C. Three D. Four View Answer / Hide Answer. 221. Strain gauges are made up of a long, thin strip of conductive material arranged in a zigzag manner. View Answer, 3. Strain gauge directly is used for the measurement of load and indirectly it is used for the measurement of displacement. Electrical strain gauge works on the principle of _____ a) variation of resistance b) variation of capacitance c) variation of … Invented by Edward E. Simmons and Arthur C. Ruge in 1938, the most common type of strain gauge consists of an insulating flexible backing which supports a metallic foil pattern. 푮. Measuring strain gauge circuits In order to measure strain with a bonded resistance strain gauge, it must be connected to an electric circuit that is capable of measuring the minute changes in resistance corresponding to strain. Transducers, Measurement & Instrumentation. Proper bonding causes errors in strain gauges. © 2011-2020 Sanfoundry. II. 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