3) Pilot hole drilling means
Answer is:
A small hole drilled into a material to guide a larger drill
Related ISRO Technician-B Turner Question Paper - 2019 (Set-1) with Answer Key
Answer is:
lock the reading after setting it over the work piece
Explanation:
The lock nut is simply a quarter turn nut that locks the spindle from turning. The sleeve contains the scale which is used to determine the measurement and the internal threads which allow the spindle to move.
