Question

Which of the following is not true for rigid borescopes?

(a) Operates like telescope in reverse

(b) Good for rapid examination

(c) Video adaptation is present

(d) Semi Rigid sheathing is present

I have been asked this question in an interview.

I want to ask this question from Visual Inspection in portion Machine Vision Systems of Engineering Metrology

Answer 1

Right option is (d) Semi Rigid sheathing is present

Easiest explanation: Semi rigid borescopes are operated like telescope in reverse. A borescope spreads the field of view. Semi Rigid sheathing is present in flexible illuminated fibrescopes and it allows the inspection at most difficult to reach spots.