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A combined double screw gauge as shown in the figure is used as
image
If the readings on the two scales with the tips of the screws touching each other are 2.97 mm and 6.04 mm when a rod is held between the screws readings are 12.55 mm and 5.96 mm what is the diameter of the ord ?
A. 9.5 mm
B. 9.6 mm
C. 9.58 mm
D. Not possible to determine

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Best answer
Correct Answer - D
`{:(,,"Scale 1",,"Scale 2 ",,"Total"),("With rod ",,12.55,,5.96,,18.51),("Without rod ",,2.97,,6.04,,9.01),("Movement " ,,9.58 ,,-0.08,,=9.5"mm"):}`
Diameter of the rod =9.5 mm

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