Which of the following is not the essential requirement for accuracy of measurement with a sine bar?

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Option C: Parallelism between top and bottom surfaces

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Practice and solve "Which of the following is not the essential requirement for accuracy of measurement with a sine bar?..." for Electrical - Measurement & Instrumentation. The correct answer is Option C: Parallelism between top and bottom surfaces. Detailed step-by-step solution, conceptual clarity, and formulas on Examoogle.

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Option A: Flatness of upper surface

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Option B: Exact distance between roller axes and mutual parallelism

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Option D: Parallelism of rollers to upper surface and equality of axis distance as from surface

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