Highway Engineering
If aggregate impact value is 20 to 30 percent, then it is classified as

unsuitable for road surfacing
satisfactory for road surfacing
exceptionally strong
strong

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Highway Engineering
The effect of grade on safe overtaking sight distance is

to decrease it on descending grades and to increase it on ascending grades
to increase it on descending grades and to decrease it on ascending grades
to decrease it on both descending and ascending grades
to increase it on both descending and ascending grades

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Highway Engineering
In soils having same values of plasticity index, if liquid limit is increased, then

Compressibility, permeability and dry strength decrease
Compressibility and permeability decrease and dry strength increases
Compressibility and permeability increase and dry strength decreases
Compressibility, permeability and dry strength increase

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