In single u-joint applications, their performance is best at angles: a) more than 15 deg b) more than 30 deg c) more than 38 deg d) less than 15 deg

The power source in a certain welding setup generates 3500w that is transferred to the low carbon steel work with a heat transfer factor of 0.85. the melting factor in the operation is 0.45. a continuous fillet weld is to be made with a cross-sectional area of 23 mm2 determine the travel speed at which the welding can be accomplished.