62. What are the parameters that metal shrinkage depends?
63. Match the casting defects in Group 1 with cause given in Group 2.
Group 1
Group 2
P. Hot tear
1. Insufficient melt superheat
Q. Misrun
2. High residual stresses
R. Blister
3. Improper venting
S. Rat tail
4. Expansion of sand
Group 1 | Group 2 |
P. Hot tear | 1. Insufficient melt superheat |
Q. Misrun | 2. High residual stresses |
R. Blister | 3. Improper venting |
S. Rat tail | 4. Expansion of sand |