Question

In given screw gauge, if pitch is 1 mm and circular scale has 100 divisions. When nothing is put between the jaws A and B which just closed then 13 divisions of C.S. are below the zero of reference line on linear or main scale. When a wire is placed between the jaws two linear scale divisions are clearly visible while 73 divisions on circular scale coincide with reference line. The error in this question is –

• A. (a) + 0.13 mm
• A. (b) + 1.30 mm
• A. (c) – 0.73 mm
• A. (d) – 7.30 mm

Answer 1

(a)

Sol. e = 13 × 0.01 = 13 mm