Project ForgeManufacturing Engineering
Metal Casting
GATE 2019
Easy
The fluidity of molten metal of cast alloys (without any addition of fluxes) increases with increase in
- Aviscosity
- Bsurface tension
- Cfreezing range
- degree of superheat
Explanation
Fluidity (the distance molten metal can flow before solidifying) increases with the degree of superheat above the melting point, since the metal takes longer to cool down to its freezing temperature. Higher viscosity, surface tension, or freezing range all REDUCE fluidity.
Source: GATE ME 2019 Session 2 (Set 3) (2019)
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