Question

How much time does a centrifugal muller take to mix the core ingredients?

(a) 20 – 50 seconds

(b) 10 – 40 seconds

(c) 50 – 80 seconds

(d) 60 – 90 seconds

This question was addressed to me in a national level competition.

The query is from Preparation of Core Mix topic in portion Molding and Core Sands of Casting-Forming-Welding I

Answer 1

Correct option is (d) 60 – 90 seconds

To elaborate: A centrifugal muller takes around 60 seconds to 90 seconds to get the core ingredients mixed properly, whereas a normal muller takes about 4 minutes for mixing the ingredients.