Mechanical Engineering - Workshop Technology - Discussion

How answer is none of these because we use v-block to location center of cylinder workpiece in the fixture.

The correct answer is to locate the centres of round rods.

A V-block is a precision tool used to:

- Locate the centres of round rods or cylinders.
- Hold and support round parts for measurement or machining.
- Ensure accurate alignment and positioning of round components.

The V-block's V-shaped groove cradles the round part, allowing for precise centring and support.

The other options are incorrect because:
- Checking the trueness of flat surfaces is typically done using a straightedge, precision square, or surface plate.
- Checking surface roughness is typically done using a surface roughness tester or profilometer.

=> V-blocks are an essential tool in precision measurement, machining, and quality control, particularly when working with round or cylindrical parts.

Specially v-block is used for holding round/circular cross sectional bar.

The V block are used to check roundness of the circular bar.

V-block is a locating device which is used to hold the round bars. Due to v-shape, it can hold easily round bars.

What is used to measure the surface roughness and trueness of flat surface?

@Harshit.

Angle plate is used for trueness.

It is used to locate cylindrical surface.

It's also used to check the roundness of the cylinder.

It is used for checking the roundness. So, C is answer.