Question

Which of the following is correct about smaller ball using in the method of checking angle of tapered hole by using balls?

(a) Small ball should be of the size so that it will be seated somewhere in between hole

(b) Small ball should be of the size so that it will be seated at the bottom most position in the hole

(c) Small ball should be of the size so that it will be seated at the top most position in the hole

(d) There is no effect of ball position on the method

The question was asked in unit test.

This question is from Check the Angle of a Tapered Hole in division Miscellaneous Measurements (EM) of Engineering Metrology

Answer 1

The correct option is (a) Small ball should be of the size so that it will be seated somewhere in between hole

Easy explanation: In this method to check the angle of tapered hole, balls are used. Smaller ball is of such size that it will be seated somewhere between the hole that is not at the bottom and not at the top. Above it bigger ball will be placed.