Prompt Title: Q1. Screw gauge can give more precise length than vernier calipers.Briefly explain why?

A screw gauge can give more precise length measurements than vernier calipers because of its finer measurement resolution. The screw gauge works based on the principle of screw thread, which has a high degree of accuracy due to its precise and consistent thread pitch.

The screw gauge has a U-shaped frame with a spindle on one end and a thimble on the other. The spindle has a small tip that moves along a screw thread, which is precisely machined on the inside of the sleeve. The thimble is attached to the sleeve and has a circular scale on its circumference. When the spindle is turned, the tip moves along the screw thread and advances towards or away from the thimble.

The circular scale on the thimble is divided into 50 or 100 equal parts, and each part represents a small displacement of the spindle tip. This allows for

very precise measurement readings, up to 0.01 mm or even 0.001 mm, depending on the screw gauge's design. In contrast, vernier calipers typically have a measurement resolution of 0.1 mm or 0.05 mm.

In addition, the screw gauge has a ratchet stop mechanism that ensures consistent and repeatable measurement readings. This mechanism prevents the spindle from being over-tightened and ensures that the tip always makes contact with the object being measured in the same way.

Overall, the screw gauge's design and mechanism allow for more precise and accurate length measurements compared to vernier calipers, making it a better tool for applications that require high precision, such as in engineering and manufacturing industries.