Question

When a screw gauge is completely closed, zero of circular scale is 6 division below the reference line of graduation. If least count of screw gauge is 0.001 cm, the zero correction is​

Answer 1

As zero of circular scale is below the reference line of graduation, zero correction is negative. 0.004 cm.

When zero of the circular scale in screw gauge stands below the main scale then error is?

• The zero error is said to be positive if, when the dial and spindle of a micrometre screw gauge are brought together, the circular scale's zero mark is below the central scale line.
• The division on the circular scale that corresponds with the main scale line can be used to determine positive zero error.

What will be the least count of the screw gauge if it has a pitch of 1 mm and 200 divisions on the circular scale?

• If the screw's pitch is 1 mm and 200 divisions are on the circular scale, then the least count of the screw gauge will be 0.005 m.

How many divisions are there in screw gauge?

• The pitch of a screw gauge is 1 mm and there are 100 divisions on the circular scale.

According to the question:

Its magnitude is 4xx 0.001 cm

= 0.004 cm

Hence, the zero of the circular scale is below the graduation reference line, the zero adjustment is negative 0.004 centimetre.

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