# GATE Mechanical 2014 Set 3 | Question: 25

The hot tearing in a metal casting is due to

1. high fluidity
2. high melt temperature
3. wide range of solidification temperature
4. low coefficient of thermal expansion

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## Related questions

A cylindrical blind riser with diameter d and height h , is placed on the top of the mold cavity of a closed type san d mold as shown in the figure. If the riser is of constant volume, then the rate of solidification in the riser is the least when the ratio h:d is $1:2$ $2:1$ $1:4$ $4:1$
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