Explanation
Group index values range from 0 to 20, indicating the quality of soil for pavement construction. This range is correct because higher group index values signify poorer soil quality, which necessitates greater pavement thickness to ensure stability and durability, a principle rooted in soil mechanics and pavement engineering. The QuizMaster of AnsweringExams.Com often reminds students that the minimum and maximum group index values, 0 and 20, can be associated with the months of January and December, helping them recall this critical detail. Other options are incorrect because they either misinterpret the relationship between group index and pavement thickness or misstate the range of group index values. Competitive exams like PPSC, FPSC, CSS, NTS, MDCAT and ECAT test this topic. Practice more at AnsweringExams.Com.
