Production and Industrial Engineering
GATE PI concept:sand-casting PYQs
Build your understanding with focused practice from past exam papers.
How to practice concept:sand-casting
Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.
Questions 1–5 of 5. Imported answers require independent review unless marked reviewed.
Question 45
Open questionPIMSQ2 marksNeeds review
A steel cube of side 10 cm is made by the sand-casting process. A cylindrical side-riser with diameter,
, and height,
, needs to be used.Assume:
No surface sharing between the riser and casting.
.The connecting link between the riser and casting does not freeze before the cast.
All the surfaces of the riser and cast are subjected to identical cooling conditions.
In this situation, which ONE or MORE among the following values of d (in cm) can theoretically fully compensate for shrinkage during casting?
Your answerSelect all correct options. You can choose more than one.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 15
Open questionPIMCQ1 markNeeds review
The solidification time of a cube and a cylinder of the same material, produced through the same sand casting process, is found to be equal. Each side of the cube is
, and the radius and the length of the cylinder are
and
, respectively. If the solidification time is governed by Chvorinov’s equation, then the ratio
isYour answerChoose one option.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 8
Open questionPIMCQ1 markNeeds review
Match the component with the corresponding manufacturing process in the table below.
Component | Manufacturing process |
|---|---|
P: Aluminum alloy piston for IC engine | 1: Blow molding |
Q: Low carbon steel oil pan | 2: Powder metallurgy |
R: Tungsten carbide cutting tool insert | 3: Sand casting |
S: Plastic bottle | 4: Deep drawing |
Your answerChoose one option.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 45
Open questionPINAT2 marksNeeds review
A company is producing a disc-shaped product of 50 mm thickness and 1.0 m diameter using sand casting process. The solidification time of the above casting process is estimated by Chvorinov’s equation
, where B is the mold constant, and V and A are the volume and surface area of the casting, respectively. It is decided to modify both the thickness and diameter of the disc to 25 mm and 0.5 m, respectively, maintaining the same casting condition. The percentage reduction in solidification time of the modified disc as compared to that of the bigger disc is ________. [round off to one decimal place]Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 48
Open questionPINAT2 marksNeeds review
A sand casting process has a mold constant of 2 s/mm² and solidification exponent of 2. If the solidification time is to be doubled for a given unit volume of material, the corresponding reduction in the cast surface area (in %) is ______
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