DRILLING - Quiz

1) What is the included angle of metric V threads?

45 Degree 29 Degree 60 Degree 47.5 Degree

2) What 46 represent in standard marking system of grinding wheel (32A46H8V)?

Grade Grain size Type of bond Type of abrasive

3) What is the colour of aluminium metal?

Dull white White Bright white Bluish grey colour

4) What H denotes in the specifications of grinding wheel 32A46H8V?

Grain size Type of abrasive Grade Structure

5) Why precision instruments are made of invar steel?

Durability Cheaper in cost Surface finishing is fine Least coefficient of expansion