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Optical gauges make use of _______(a) pulleys(b) electricity(c) mirrors(d) rack and pinionI got this question at a job interview.My doubt stems from Types of Strain Gauges topic in portion Transducers of Electrical Measurements |
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Answer» CORRECT choice is (C) mirrors The explanation: Optical GAUGES are similar to mechanical gauges. They make use of prisms and mirrors for obtaining magnification. A plain mirror is FIXED onto a MOVABLE knife edge. |
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