To measure the thickness of a given sheet using a screw gauge.

1) What is the pitch of a screw?

The length between the two closest threads along the screw’s axis is called the pitch of a screw.

2) What is the minimum count of a screw gauge?

The minimum count on a screw gauge is 0.001 cm.

3) Explain the zero error of screw gauges?

The error arises when the zero point of the circular scale does not meet with the zero point of the main scale upon connecting the two studs.

4) When is the positive zero error?

When zero division on the scale appears above the reference line, it is considered a positive zero error.

5) Explain the range of the screw gauge?

The screw gauge range is the maximum length of the main scale.

6) Does the screw diameter depend on the temperature?

Yes, the screw diameter depends on the temperature. The diameter of the screw increases when the temperature rises.

7) What are measuring tools?

They are the instruments that help to measure physical quantities of a body such as height, width, length, temperature, etc.

8) What is the purpose of a vernier calliper?

Vernier calliper is a measuring device. It helps in measuring purposes when a component is to be calculated to the second to decimal.

9) What is the minimum value that can be calculated using a micrometre and vernier calliper?

The minimum value that can be calculated using a micrometre or vernier calliper scale is known as its least count.

It can be calculated using the formula;

\(\begin{array}{l}Least count = \frac{Smallest division on mainscale}{Total number of division on vernier or micrometre scale}\end{array} \)

11) Which are the main stationary screw gauge parts?

The main stationary screw gauge parts are the anvil, spindle, sleeve, thimble and frame.

12) What are the main types of screw gauges?

Universal micrometre sets, blade micrometres, tube micrometres, bench micrometres and ball micrometres are the main types of screw gauges.

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