Question

Which of the following is the blind hole?

(a) All ordinary holes are called blind holes

(b) Those hole which has specified depth without breaking through the other side

(c) Those holes which goes all the way through metal

(d) Clearance holes are the blind holes

I had been asked this question during an internship interview.

My question is based upon Measure an Internal Taper in Blind Hole topic in division Miscellaneous Measurements (EM) of Engineering Metrology

Answer 1

The correct answer is (b) Those hole which has specified depth without breaking through the other side

Easiest explanation: Blind holes are those which are drilled or reamed etc. at a specified depth. It is drilled without breaking through the other side. Those holes which go all the way through the work piece are known as through holes.