Q. Arrange the following processes in INCREASING magnitude of surface roughness of the casting.
P. Investment casting
Q. Permanent mould casting
R. Pressure die casting
S. Sand casting
(A) R < S < Q < P
(B) P < S < Q < R
(C) R < P < Q < S
(D) Q < P < R < S
Ans: R < P < Q < S
![Determine the correctness (or otherwise) of the following Assertion [A] and the Reason [R]](https://www.gkseries.com/blog/wp-content/uploads/2023/10/Determine-the-correctness-or-otherwise-of-the-following-Assertion-A-and-the-Reason-R.jpg)
