PE Civil Practice Test 5

10 free PE Civil practice questions in the real exam format, covering the official content areas, with an explanation for every answer.

PE Civil Practice Test 5Tutor mode

Question 1 of 10

Geotechnical

A levee embankment will be built over an 8.0-m-thick layer of soft clay. The clay is underlain by dense sand and overlain by a sand drainage blanket, so it drains at both boundaries. Laboratory consolidation tests give cv = 2.5 m²/yr. Time factors are T50 = 0.197 and T90 = 0.848. The time required to reach 90% average primary consolidation is most nearly: