Question

The fluidity of molten metal of cast alloys (without any addition of fluxes) increases with increase in
1. viscosity
2. surface tension
3. freezing range
4. degree of superheat

Answer 1

Correct Answer - Option 4 : degree of superheat

Explanation:

• Fluidity is defined as ability of a metal to flow and fill the mold.
• The higher the pouring temperature, higher the fluidity.
• Pouring temperature increases with increase in degree of superheat and hence fluidity increases.