Hot cracks occur in the weld and fusion zone as die metal solidifies. Which of the following are the causes for hot cracks? 1. Presence of sulphur and phosphorous for hot cracks. 2. High carbon or alloy content of the base metal. 3. Moisture in the joint or electrode. 4. Joint restraint. Select the correct answer using the code given below:

Hot cracks occur in the weld and fusion zone as die metal solidifies.

1.	Hot cracks occur in the weld and fusion zone as die metal solidifies. Which of the following are the causes for hot cracks? 1. Presence of sulphur and phosphorous for hot cracks. 2. High carbon or alloy content of the base metal. 3. Moisture in the joint or electrode. 4. Joint restraint. Select the correct answer using the code given below:
A.	1, 2 and 4
B.	1, 2 and 3
C.	laminar flow
D.	1, 2, 3 and 4
Answer» B. 1, 2 and 3

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