22 Questions
What is the purpose of the gating system in a sand casting mold?
All of the above
Which of the following pattern materials is least commonly used for sand casting?
Steel
What is the purpose of the shrinkage allowance in a sand casting pattern?
To account for the volumetric contraction of the metal during solidification
According to Chvorinov's Rule, which part of a casting will solidify first?
The thinnest section
What is the purpose of the riser in a sand casting process?
To provide a reservoir of molten metal to compensate for shrinkage
Which type of pattern is typically used for complex geometries in sand casting?
Cope-and-drag pattern
What is the purpose of the shrinkage allowance when designing a pattern for casting?
To account for the shrinkage of the metal as it solidifies
What is the purpose of the finish allowance in pattern design?
To allow for additional material to be removed during machining for a better surface finish
Which type of sand mold is typically used for larger castings due to its high strength?
Skin-dried mold
What is the purpose of the draft (taper) allowance in pattern design?
To facilitate the removal of the pattern from the mold
According to Chvorinov's Rule, which factors influence the solidification time of a casting?
All of the above
What is the purpose of the rap (shake) allowance in pattern design?
To facilitate the removal of the pattern from the mold
What is the main purpose of a riser in casting?
To facilitate directional solidification
According to Chvorinov's Rule, which casting will solidify faster?
A casting with a lower volume-to-surface area ratio
What is the main cause of shrinkage during casting?
The solid phase having a higher density than the liquid phase
What is the purpose of chills in casting?
To encourage rapid freezing in certain regions of the casting
What happens during the solidification process of a casting?
The volume of the metal decreases
Which statement about Chvorinov's Rule is correct?
It relates the total solidification time to the volume-to-surface area ratio
What is the purpose of achieving directional solidification in casting?
To minimize the damaging effects of shrinkage
What is the main factor that determines the success of the pouring step in casting?
All of the above
Which of the following statements about volumetric changes during casting is correct?
The volume of the metal decreases during solidification and cooling
What is the main advantage of casting processes?
All of the above
Test your knowledge on the different types of expendable-mold casting processes covered in ME 205, such as sand casting, shell molding, full-mold casting, and more. This quiz is based on the lecture materials by Dr. Ramazan Hakkı Namlu from Atılım University.
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