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  • A screw gauge with a pitch of 0.5 mm and a circular scale with 50 divisions is used to measure the thickness of a sheet. If the main scale reading is 2 mm and the thimble scale reading is

A screw gauge with a pitch of 0.5 mm and a circular scale with 50 divisions is used to measure the thickness of a sheet. If the main scale reading is 2 mm and the thimble scale reading is 25, what is the thickness of the sheet in mm?

Option: 1

2.13 mm


Option: 2

2.23 mm


Option: 3

2.25 mm

 


Option: 4

2.27 mm


Answers (1)

best_answer

The total reading of the screw gauge is given by the sum of the main scale reading, the product of the pitch and the number of complete rotations of the thimble scale, and the product of the pitch and the thimble scale reading divided by the number of circular scale divisions:

\text{Total reading} = 2 \text{ mm} + 0.5 \text{ mm} \times 0 \text{ rev} + \frac{0.5 \text{ mm}}{50} \times 25 = 2.25 \text{ mm}

Therefore, the thickness of the sheet is 2.25 mm, which is option (3).

Posted by

SANGALDEEP SINGH

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