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.	Blow holes	2.	Low permeability of the sand mould
R	Shrinkage	3.	Volumetric contraction both in liquid and solid stage
S.	Cold shunt	4.	Differential cooling rate

• A. P-1, Q-4, R-4, S-3
• B. P-1, Q-3, R-2, S-4
• C. P-3, Q-4, R-2, S-1
• D. P-4, Q-3, R-2, S-1

Answer 1

The correct option is D P-4, Q-3, R-2, S-1

P-4, Q-3, R-2, S-1