GATE ME 2014 Set 3 — Question 32

MCQ+1 / -0.33EasyCasting Defects & YieldCastingManufacturing Processes

Manufacturing Processes → Casting → Casting Defects & Yield

Last updated 5 September 2026

Question

Match the casting defects (Group A) with the probable causes (Group B): Group A Group B P: Hot tears 1: Improper fusion of two streams of liquid metal Q: Shrinkage 2: Low permeability of the sand mould R: Blow holes 3: Volumetric contraction both in liquid and solid stage S: Cold Shut 4: Differential cooling rate

Group A	Group B
P: Hot tears	1: Improper fusion of two streams of liquid metal
Q: Shrinkage	2: Low permeability of the sand mould
R: Blow holes	3: Volumetric contraction both in liquid and solid stage
S: Cold Shut	4: Differential cooling rate

Correct answer (B) P-4, Q-3, R-2, S-1 Solution The matching of casting defects with their causes is as follows: Hot tears (P) : These are cracks caused by tensile stresses during cooling, often due to differential cooling rates (4) . Shrinkage (Q) : Caused by volumetric contraction (3) during solidification and cooling. Blow holes (R) : Caused by trapped gases when the permeability of the sand mould is low (2) . Cold Shut (S) : Occurs due to improper fusion of two streams of liquid metal (1) . Thus, the correct match is P-4, Q-3, R-2, S-1. Turn this into a strength. Explore AI-powered practice and doubt support with Success Tracker.

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Correct answer (B) P-4, Q-3, R-2, S-1 Solution The matching of casting defects with their causes is as follows: Hot tears (P) : These are cracks caused by tensile stresses during cooling, often due to differential cooling rates (4) . Shrinkage (Q) : Caused by volumetric contraction (3) during solidification and cooling. Blow holes (R) : Caused by trapped gases when the permeability of the sand mould is low (2) . Cold Shut (S) : Occurs due to improper fusion of two streams of liquid metal (1) . Thus, the correct match is P-4, Q-3, R-2, S-1.

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