Ratchet is the part of

Question

Question

This question was previously asked in

BPSC AE Paper 4 (General Engineering Science) 10 Nov 2022 Official Paper

Answer 1

Explanation:

Micrometer:

A micrometer is a precision instrument used to measure a job, generally within an accuracy of 0.01 mm.
Micrometers used to take the outside measurements are known as outside micrometers.
The ratchet stop ensures uniform pressure between the measuring surfaces.

micrometer1

Important Points

The parts of a micrometer are listed here.

Ratchet stop: The ratchet stop ensures uniform pressure between the measuring surfaces.

Frame: The frame is made of drop-forged steel or malleable cast iron. All other parts of the micrometer are attached to this.
Barrel/Sleeve: The barrel or sleeve is fixed to the frame. The datum line and graduations are marked on this.
Thimble: On the beveled surface of the thimble also, the graduation is marked. The spindle is attached to this.
Spindle: One end of the spindle is the measuring face. The other end is threaded and passes through a nut. The threaded mechanism allows for the forward and backward movement of the spindle.
Anvil: The anvil is one of the measuring faces which is fitted on the micrometer frame. It is made of alloy steel and finished to a perfectly flat surface.
Spindle lock nut: The spindle lock nut is used to lock the spindle at the desired position.