Question

V-block used in the workshop to check:

• A. Surface roughness of workpiece
• B. Dimensions of oval job
• C. Taper on job
• D. Roundness of cylindrical job

Hint:

V-blocks are ideal for holding and measuring cylindrical objects, particularly for checking their roundness.

Answer 1

The Correct Option is D

Step 1: Understand the function of a V-block.
A V-block is a precision tool used in workshops for holding cylindrical workpieces for measurement and inspection. It is designed with a "V" shaped groove that ensures the workpiece is held securely, and it is commonly used for checking the roundness and straightness of cylindrical jobs. Step 2: Conclusion Thus, the V-block is primarily used to check the roundness of cylindrical jobs. Final Answer: \[ \boxed{\text{Roundness of cylindrical job}} \]