V-block is used to
A. Check the trueness of flat surfaces
B. Locate centres of round rods
C. Check the surface roughness
D. None of these
Answer: Option D
Solution(By Examveda Team)
V-Blocks are precision metalworking jigs typically used to hold round metal rods or pipes for performing drilling or milling operations.They consist of a rectangular steel or cast iron block with a 90 degree channel rotated 45 degrees from the sides, forming a V-shaped channel in the top.
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v block use for locate centre of round bar as well as checking roundness of cylindrical surfaces
Ans is B
Ans is C.