MEASUREMENT and METROLOGY Set 3

250mm*3mm

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100mm*2mm

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150mm*3mm

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150mm*2mm

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is poor for smaller angles ✘ is maximum when angle of measurement is ✘ decreases appreciably with steep angle ✘ is dependent on accuracy of outer dimensions of sine bar ✔

sine bar and slip gauges ✘ dividing head ✘ height gauge ✘ clinometer ✔

trigonometry ✘ optimetry ✘ interferometry ✘ algebric ✔

Trammel ✘ Hermaphrodite caliper ✘ Divider ✘ Sine bar ✔

45 ✘ 60 ✘ 90 ✘ 120 ✔

Flatness of upper surface ✘ Exact distance between roller axes and mutual parallelism ✘ Parallelism between top and bottom surfaces ✘ Parallelism of rollers to upper surface and equality of axis distance as from surface ✔

center distance between the two rollers and size of rollers ✘ its total length ✘ weight of sine bar ✘ length and width of rollers ✔

0.001 mm

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0.005 mm

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0.01 mm

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0.05 mm

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High carbon ✘ High chromium ✘ Corrosion-resistant steel ✘ Aluminum ✔