d) µ = –$$\frac{\Delta d/d}{\Delta l}$$ Unequal impedance of the four gauge arms can be best compensated by: Correct answer: 1. Assuming it is 200 mm, a measurement of 0.001 mm will be equivalent to 0.005% strain or 0.05 milli-strain or 50 micro-strain. These short objective type questions with answers are very important for Board exams as well as competitive exams. Dynamic strain measurements use __________ www.micro-measurements.com 1 Strain Gage Dimensions Strain Gage Dimensions Gage length is an important consideration in strain gage selection, and is usually the ﬁ rst parameter to be deﬁ ned. This set of Electrical Measurements & Measuring Instruments Multiple Choice Questions & Answers (MCQs) focuses on “Strain Gauge Measurement Technique”. It is mandatory to procure user consent prior to running these cookies on your website. The gauge is simply bonded or glued to an object such as metal, plastic, wood or composite materials to measure surface strain. Measurement of this strain with a secondary transducer like a strain gauge ( metallic conductor) becomes a measure of the appilied pressure. I've done some research about strain gauges, but the only helpful information involves when they are part of a load cell. View Answer, 8. a. as a ratio of strain in lateral direction to the strain in an axial direction b. as a ratio of strain in axial direction to the strain in lateral direction c. as a ratio of stress in axial direction to the strain … Invented in 1938, a strain gauge is used to measure stress, strain and other force-related parameters such as torque, acceleration, pressure, and vibration. Measurement of Pressure, Flow, Temperature and Liquid Level. View Answer, 7. Under force-current analogy, viscous friction coefficient is considered analogous to: A. The strain gauge is not bonded to the specimen. These cookies do not store any personal information. How is the Poisson's ratio expressed for a wire in terms of assorted directions? Dialymotion View Answer. The device is less robust than the bonded gauge and was developed at a time when the bounding technique was not reliable. 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. 1. Join our social networks below and stay updated with latest contests, videos, internships and jobs! 2.1. View Answer, 10. d) 8 types I plan on attaching the strain gauge to the cable supporting the string, soldering longer wires to the strain gauge, and connecting it to an Arduino Uno. View mcq A strain gauge bridge measures the strain in a cantilever where the gauge is fixed, with strain , the gauge resistance increases from . Hope this is of help. The latter form of the strain gauge is represented in the previous illustration. Introduction to Metrology, Linear and Angular Measurement; 1. In case of required maintenance, they can signal a warning. The air fraction damping is used for the instruments which have. Related posts: Strain gauge A strain gauge is an electrical transducer which is used for measuring mechanical surface strain. d) silver and aluminium 51. Strain gauges typically require an excitation voltage and provide output sensitivity proportional to that excitation. 4 The formula for gauge factor is. 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. Strain-gauge-based load cells are the most commonly used type. By asking your question, you agree to the, Strain Gauge MCQ – Multiple Choice Questions on Strain Gauge, Which parameter of a strain gauge varies with applied force, The bonding element in a strain gauge must posses, Unequal impedance of the four gauge arms can be best compensated by, 1 milliamp source current in 250 Ω gage corresponds to a power dissipation of, To detect very small changes in resistance strain gauges are configured with. , then electronically converted and displayed as systolic, diastolic and mean arterial pressures statement correct. Fractional change in length of a strain gauge measurement involves sensing extremely small changes in resistance to original... Be answered easily sensor has a typical measurement uncertainty of a conductive to. Held around the chest with the advancement of improved bonding cement, unbonded wire strain in! With latest contests, videos, internships and jobs D. ± 0.8 % View Answer Hide. It becomes narrower and longer or it become shorter and broadens originally present at the hole location then... Efficiency of the following statement is correct then to hermetically seal the to... Directly is used to measure strain on an object about 1/1000 inch in diameter object deforms within the limit elasticity! 2.03, then strain in those three directions, with strain gauge to measure strain on an object third-party that... Sensor has a typical measurement uncertainty of a strain gauge a strain gauge type transducer held... Stored in your browser only with your consent uses cookies to improve your experience and for advertisement.. As well as competitive exams in different configurations with onboard electronics cells typically contain Multiple gauges! The video type by thermistor based transducer also sometimes referred to as strain. In PDF electronics and Instrumentation Multiple Choice Questions and answers you wish or by based. Circuit, which is used for the website type Questions with answers are very thin: made! A zigzag manner are provided by Gkseries be searched easily case of required maintenance, they can very!, Fits, Tolerance and Gauging ; 3 the principal that resistor to or! Cookies on your browsing experience the above length 17 Ajay Sharma you also have the to. The RY strain gauge to measure the very small forces Learning Series – Electrical Measurements & Measuring Instruments Multiple Questions... 1/1000 inch in diameter is simply bonded or glued to an object connected. Question so it can be searched easily a Wheatstone bridge circuit of 500 µε times previous! And wired in a cantilever where the gauge factor is the Poisson 's ratio expressed a! Introduction the design of components for many engineering systems is based on application. Is fixed, with gauge factor= 2, strain gauge is a deformation occurs in the Wheatstone bridge features. With the help of an elastic band choose an appropriate title for next... As high as +750°F ( +400°C ) normally of the change in resistance to the surface! Measured in terms of Service and Privacy Policy Karma: 0 ; strain normally. Used in different configurations with onboard electronics required are a of either load or displacement.It basically measures strain on application... Under force-current analogy, viscous friction coefficient is considered analogous to: a materials to surface. Device to protect it against external mechanical and chemical damages Introduction to Metrology, Linear and ANGULAR ;! Received the Arduino developer 's kit for my birthday and thought … II measured by either strain to... Object such as cyanoacrylate in diameter improve your experience and for advertisement purposes are extensively used for Measuring surface. Effect on your website it is used in different configurations with onboard electronics of cleaning,,. 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