Question

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

(a) Lap joints eliminates eccentricity whereas butt joints develops eccentricity

(b) Butt joints minimizes the size of connection

(c) Lap joints are aesthetically pleasing over butt joints

(d) Butt joint obtained from full penetration groove weld has 50% efficiency

I got this question during an interview for a job.

The origin of the question is Weld Defects & Types of Joints in section Welded Connections of Design of Steel Structures

Answer 1

Correct answer is (b) Butt joints minimizes the size of connection

Easy explanation: 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.