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Which of the following are correct regarding butt joints over lap joints?

Which of the following are correct regarding butt joints over lap joints? Correct Answer Butt joints minimizes the size of connection

Butt joints eliminates eccentricity developed using lap joints. Butt joints minimizes the size of connection and are aesthetically pleasing over lap joints. Butt joint obtained from full penetration groove weld has 100% efficiency.

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