Micrometer screw – problems and solutions

1. The measurement of the diameter of the wire with a micrometer is 2.48 mm. The image corresponding to the measurement result is…

Micrometer screw - problems and solutions 1

Micrometer screw - problems and solutions 2

Solution :

A. Wire diameter = 4, …..

B. Wire diameter = 3, …..

C. Wire diameter = 2, …..

D. Diameter of wire = 1, …..

E. Wire diameter = 4, …..

The correct answer is C.

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2. The measurement of the diameter of the wire with a micrometer is 1.95 mm. The image that matches with the measurement results is…

Micrometer screw - problems and solutions 3

Micrometer screw - problems and solutions 4

Solution :

A.

Main scale = 1.5 mm

Swivel scale = 38 x 0.01 mm = 0.38 mm

0.01 mm is the threshold of micrometer screws accuracy.

Wire diameter = 1.5 mm + 0.38 mm = 1.88 mm.

B.

Main scale = 1.5 mm

Swivel scale = 39 x 0.01 mm = 0.39 mm

0.01 mm is the threshold of micrometer screws accuracy

Wire diameter = 1.5 mm + 0.39 mm = 1.89 mm

C.

Main scale = 1.5 mm

Swivel scale = 43 x 0.01 mm = 0.43 mm

0.01 mm is the threshold of micrometer screws accuracy

Wire diameter = 1.5 mm + 0.43 mm = 1.93 mm

D.

Main scale = 1.5 mm

Swivel scale = 42 x 0.01 mm = 0.42 mm

0.01 mm is the threshold of micrometer screws accuracy

Wire diameter = 1.5 mm + 0.42 mm = 1.92 mm

E.

Main scale = 1.5 mm

Swivel scale = 45 x 0.01 mm = 0.45 mm

0.01 mm is the threshold of micrometer screws accuracy

Wire diameter = 1.5 mm + 0.45 mm = 1.95 mm

The correct answer is E.

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3. The result of the measurement of the diameter of the metal granule sphere by using screw micrometer is 2.75 mm. The image that matches with the measurement results is…

Micrometer screw - problems and solutions 5

Micrometer screw - problems and solutions 6

Solution :

A.

Main scale = 2.5 mm

Swivel scale = 20 x 0.01 mm = 0.20 mm

Wire diameter = 2.5 mm + 0.20 mm = 2.7 mm

B.

Main scale = 2.5 mm

Swivel scale = 15 x 0.01 mm = 0.15 mm

Wire diameter = 2.5 mm + 0.15 mm = 2.65 mm

C.

Main scale = 2.5 mm

Swivel scale = 25 x 0.01 mm = 0.25 mm

Wire diameter = 2.5 mm + 0.25 mm = 2.75 mm

The correct answer is C.

4. The measurement of the diameter of the steel cylinder with a screw micrometer is 4.47 mm. The correct measurement result shown in the following figure is…

Micrometer screw - problems and solutions 7

Micrometer screw - problems and solutions 8

Micrometer screw - problems and solutions 9

Solution :

A.

Main scale = 4.5 mm

Swivel scale = 47 x 0.01 mm = 0.47 mm

0.01 mm is the threshold of micrometer screws accuracy

Wire diameter = 4.5 mm + 0.47 mm = 4.97 mm

B.

Main scale = 4 mm

Swivel scale = 47 x 0.01 mm = 0.47 mm

0.01 mm is the threshold of micrometer screws accuracy

Wire diameter = 4 mm + 0.47 mm = 4.47 mm

C.

Main scale = 5.5 mm

Swivel scale = 47 x 0.01 mm = 0.47 mm

0.01 mm is the threshold of micrometer screws accuracy

Wire diameter = 5.5 mm + 0.47 mm = 5.97 mm

D.

Main scale = 3 mm

Swivel scale = 47 x 0.01 mm = 0.47 mm

0.01 mm is the threshold of micrometer screws accuracy

Wire diameter = 3 mm + 0.47 mm = 3.47 mm

E.

Main scale = 7.5 mm

Swivel scale = 47 x 0.01 mm = 0.47 mm

0.01 mm is the threshold of micrometer screws accuracy

Wire diameter = 7.5 mm + 0.47 mm = 7.97 mm

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