31) The maximum spacing contraction joints in rigid pavements is
a) 2.5 m
b) 3.5 m
c) 4.5 m
d) 5.5 m
32) The ductility value of bitumen for suitability in road construction should not be less than
a) 30 m
b) 40 m
c) 50 m
d) 60 m
33) The group index of a soil sub-grade is 7. The sub-grade soil is rate as
a) poor
b) very poor
c) good
d) fair
34) What is the recommended grade of tar of grouting purpose ?
a) RT-1
b) RT-2
c) RT-3
d) RT-5
All The Best!!