Production and Industrial Engineering
GATE PI Casting PYQs
Build your understanding with focused practice from past exam papers.
How to practice 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 1–10 of 19. Imported answers require independent review unless marked reviewed.
Question 25
Open questionPIMSQ1 markNeeds review
Which ONE or MORE among the following tube cross-sections shown can be produced by true centrifugal casting method?
Note: The cross-sections shown are perpendicular to the axis of rotation. Figures are not to scale.
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 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?
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Open questionPIMCQ1 markNeeds review
Which one of the following casting defects is caused due to the supply of the molten metal through two gates?
Your answerChoose one option.
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Open questionPINAT2 marksNeeds review
In casting a cube of 80 mm side, the volumetric shrinkages due to solidification and solid contraction are 4.5% and 2%, respectively. Assume uniform cooling in all directions. The side (in mm) of the cube pattern for getting the required size casting is________. (Rounded off to two decimal places)
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The solidification of a casting starts at 10 AM. However, the solidification of the molten metal at the center-line of the mold starts at 10:03 AM and ends at 10:10 AM. The casting is considered solidified completely when the solidification is completed at the center-line of the mold. The center-line feeding resistance (CFR) in percentage is________. (Answer in integer)
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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 54
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In a sand mold, a sprue of height
mm is to be provided for maintaining the molten metal flow rate of
mm
/s. The height of liquid column above the point 2 is kept constant at
mm. The cross-sectional areas of the sprue at points 2 and 3 are
and
, respectively. The points 1 and 3 are at the atmospheric pressure. Assuming the gauge pressure at point 2 to be zero as the limiting case to prevent aspiration effect, the ratio
is ________. (Rounded off to 2 decimal places) 
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Open questionPINAT2 marksNeeds review
The solidification of a cubic casting of side 100 mm takes place with volumetric solidification shrinkage and solid contraction of 10 % each. The shape of the casting is retained on cooling to room temperature. The side of the cubical cast, in mm, at room temperature is _____ (round off to 2 decimal places).
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A cylindrical casting has 10 cm diameter and a mass of 12.56 kg. The material density is 7.85 × 10⁻³ kg/cm³. The value of exponent ‘n’ is 2 and solidification time is 12 min. The Chvorinov’s constant, in min/cm², is _____ (round off to 2 decimal places).
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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
Match the casting methods with products.
Casting method | Products |
|---|---|
P. Continuous casting | 1. Thin and intricate shaped components |
Q. Investment casting | 2. Hollow asymmetric parts (such as pipes) |
R. Centrifugal casting | 3. Slabs and strips |
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