MANUFACTURING TECHNOLOGY Set 1

Its end tapered for about three or four threads ✘ Its end tapered for about eight or ten threads ✘ Full threads for the whole of its length ✘ None of the above ✔

L-type slots ✘ T-type slots ✘ I-type slots ✘ Any one of these ✔

Taper tap ✘ Second tap ✘ Bottoming tap ✘ Any one of these ✔

Counter-sinking ✘ Counter-boring ✘ Trepanning ✘ Spot facing ✔

Improves ✘ Deteriorates ✘ Does not effect ✘ None of these ✔

Internal screw threads ✘ External screw threads ✘ No threads ✘ Tapered threads ✔

Hard and brittle materials ✘ Soft and ductile materials ✘ Hard and ductile materials ✘ Soft and brittle materials ✔

Tungsten ✘ Chromium ✘ Silicon ✘ Cobalt ✔

250 ✘ 350 ✘ 500 ✘ 900 ✔

Soft materials ✘ Tough materials ✘ Ductile materials ✘ All of these ✔