Arc blow
Distortion
Uneven bead
Slag inclusion
T joint, Lap joint
T joint, Corner joint
Corner joint, Edge joint
T joint, Lap joint, Corner joint, Edge joint
More chances of distortion
More penetration will result
Likely defects like blowhole, porosity
Base metal not fused till the bottom of joint
Long arc length
Short arc length
Normal arc length
Too long arc length