DRILLING - Practice Mode

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

45 Degree 29 Degree 60 Degree 47.5 Degree

Correct Answer: 60 Degree

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

Grade Grain size Type of bond Type of abrasive

Correct Answer: Grain size

3) What is the colour of aluminium metal?

Dull white White Bright white Bluish grey colour

Correct Answer: White

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

Grain size Type of abrasive Grade Structure

Correct Answer: Grade

5) Why precision instruments are made of invar steel?

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

Correct Answer: Least coefficient of expansion

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