Which one of the following material will require the largest size of riser for the same size of casting?
A. Aluminium
B. Cast iron
C. Steel
D. Copper
Answer: Option C
Solution (By Examveda Team)
Steel will require the largest size of riser for the same size of castingThis Question Belongs to Mechanical Engineering >> Workshop Technology
C how
C
Riser is provided to compensate the liquid shrinkage and
Aluminum has largest shrinkage which about 6.5%
If the total shrinkage is considered which is
Liquid shrinkage + solid shrinkage = total shrinkage
Then
In that case steel is right answer
Aluminium has the largest liquid shrinkages which is about 6.5%