27) It is required to finish grind a Dia 50 mm mild steel shaft on a cylindrical grinding machine. What will be the surface speed if r.p.m. of the wheel is 191 ?
Answer is:
30 metres/min.
Related Grinding MCQ - Machinist(Set-1) with Answers
Answer is:
All of the above
Explanation:
Natural abrasives are
* Corrundum
* Diamond
* Emery
Answer is:
Aluminium oxide
Explanation:
A grinding wheel consists of the abrasive that does the cutting, and the bond that holds the abrasive particles together.
There are two types of abrasives.
1. Natural abrasive The natural abrasives are emery and corrundum,These are impure forms of aluminium oxide.
2. Artificial abrasive Artificial abrasives are silicon carbide and aluminium oxide.
Answer is:
Diamond wheel is used
Explanation:
For grinding carbide materials diamond wheel is used.
