question_answer

Match List-I (Welding problems) with List-II (Causes) and select the correct answer using the codes given below the list:

List-I		List-II
A.	Cracking of weld	1.	Excessive metal stresses
B.	Cracking of base	2.	High joint metal  rigidity
C.	Porosity	3.	Oxidation
D.	Inclusions	4.	Excessive \[{{H}_{2}},{{O}_{2}},{{N}_{2}}\] in the welding atmosphere

Codes:

A) A\[\to \]2, B\[\to \]1, C\[\to \]4, D\[\to \]3

B) A\[\to \]3, B\[\to \]4, C\[\to \]2, D\[\to \]1

C) A\[\to \]2, B\[\to \]4, C\[\to \]2, D\[\to \]1

D) A\[\to \]3, B\[\to \]1, C\[\to \]4, D\[\to \]2