Question

During the clear, cool night followed by a hot sunny day, the edges and corners of slab will ____________

(a) wrap downward

(b) wrap upward

(c) wrap upwards and downwards

(d) wrap laterally

I got this question during an internship interview.

This interesting question is from Design of Rigid Pavements in section Design of Flexible & Rigid Pavement of Geotechnical Engineering II

Answer 1

Right option is (b) wrap upward

For explanation I would say: During the clear, cool night followed by a hot sunny day, the edges and corners of slab will wrap upward. When this occurs, the corners may be partially supported or even unsupported in some cases.