Question

Neglecting self weight, which of the following beams will have points of contraflexure ?

A. A simply supported beam with uniformly distributed load over part of the structure B. An overhanging beam with loading only over supported span and not on overhangs C. Fixed beam subjected to concentrated load D. Cantilever beam subjected to uniformly varying load with zero load at free end

Answer 1

D. Cantilever beam subjected to uniformly varying load with zero load at free end

Answer 2

D will have points of contraflexure, where the bending moments will sum to zero and there is no resultant bending of the beam.
This is because the load is zero at the end (at maximum distance) and is uniformly increasing towards the support, as the distance decreases.   Moment = load * distance.