(English Medium) ICSE Class 9 - CISCE Question Bank Solutions

Which part of vernier callipers is used to measure the internal length of a hollow cylinder?

The circular scale of a screw gauge has 50 divisions. Its spindle moves by 2 mm on the sleeve, when given four complete rotations calculate

1. pitch
2. least count

The circular scale of a screw gauge has 100 divisions. Its spindle moves forward by 2.5 mm when given five complete turns. Calculate

1. pitch
2. least count of the screw gauge

Figure shows a screw gauge in which circular scale has 200 divisions. Calculate the least count and radius of the wire.

Figure shows a screw gauge in which circular scale has 100 divisions. Calculate the least count and the diameter of a wire.

A micrometre screw gauge having a positive zero error of 5 divisions is used to measure diameter of a wire, when reading on the main scale is 3rd division and the 48th circular scale division coincides with baseline. If the micrometer has 10 divisions to a centimetre on the main scale and 100 divisions on a circular scale, calculate

1. Pitch of screw
2. Least count of screw
3. Observed diameter
4. Corrected diameter.

A micrometre screw gauge has a positive zero error of 7 divisions, such that its main scale is marked in 1/2 mm and the circular scale has 100 divisions. The spindle of the screw advances by 1 division complete rotation.
If this screw gauge reading is 9 divisions on the main scale and 67 divisions on the circular scale for the diameter of a thin wire, calculate

1. Pitch
2. L.C.
3. Observed diameter
4. Corrected diameter

The thimble of a screw gauge has 50 divisions for one rotation. The spindle advances 1 mm when the screw is turned through two rotations.

1. What is the pitch of the screw?
2. What is the least count of screw gauge?
3. When the screw gauge is used to measure the diameter of wire the reading on the sleeve is found to be 0.5 mm and reading on thimble is found, 27 divisions. What is the diameter of the wire in centimetres?

A micrometre screw gauge has a negative zero error of 8 divisions. While measuring the diameter of a wire the reading on the main scale is 3 divisions and the 24th circular scale division coincides with baseline.
If the number of divisions on the main scale are 20 to a centimetre and circular scale has 50 divisions, calculate

1. pitch
2. observed diameter.
3. least count
4. corrected diameter.

A micrometre screw gauge has a negative zero error of 7 divisions. While measuring the diameter of a wire the reading on the main scale is 2 divisions and 79th circular scale division coincides with baseline.
If the number of divisions on the main scale is 10 to a centimetre and circular scale has 100 divisions, calculate

1. pitch
2. observed diameter
3. least count
4. corrected diameter.

For what range of measurement is micrometre screw gauge used?

What do you understand by the following term as applied to micrometre screw gauge?

Sleeve cylinder

What do you understand by the following term as applied to micrometre screw gauge?

Sleeve scale

What do you understand by the following term as applied to micrometre screw gauge?

Thimble

What do you understand by the following term as applied to micrometre screw gauge?

Thimble scale

What do you understand by the following term as applied to micrometre screw gauge?

Baseline

What is the function of ratchet in the screw gauge?

What do you understand by the term least count of screw?

State the formula for calculating the pitch of screw.

State the formula for calculating the least count of screw.