DRILLING - Quiz

1) Determine the drill size for finishing Dia 19 mm reaming hole (as per table under size 0.2 & over size 0.05 mm)?

18.75 mm 19.00 mm 19.25 mm 19.05 mm

2) What is the reason if the drilled hole is larger than the drill size?

Drill is not sharp Feed rate is too high Cutting speed is too high Unequal angle of cutting edge

3) What is the term, the top surface joining the two sides of a thread?

Root Crest Flank Pitch

4) What V denotes in grinding wheel specification 32A46H8V?

Bond Grade Abrasive Grain size

5) What type of abrasive wheel is used for grinding die steel?

Silicon carbide Green silicon carbide White aluminium oxide Brown aluminium oxide