DRILLING - Quiz

1) What is the purpose of flute in drill?

To drive out the chips To reduce the weight To reduce the cost To increase the speed

2) What is the angle of countersink tool used on holes to be threaded?

75 Degree 80 Degree 90 Degree 120 Degree

3) What is the formula to calculate the blank size of external thread (where p=pitch and d=depth)?

D = d ? p/10 D = d + p/10 D = d x p/10 D = d ? p/10

4) Which type of thread, the crest and roots are rounded to form a semi circle?

Acme thread Square thread Knuckle thread Trapezoidal thread

5) What 5 denotes in grinding wheel specification 41A46H5U8?

Bond Abrasive Structure Grain size