The group index for a soil, whose liquid limit is 40 percent, plasticity index is 10 percent and percentage passing 75 micron IS sieve is 35, is______________?
A. 0
B. 3
C. 5
D. 7
Highway Engineering
Softening point of bitumen to be used for read construction at a place where maximum temperature is 40° C should be______________?
Softening point of bitumen to be used for read construction at a place where maximum temperature is 40° C should be______________?
A. less-than 40°C
B. greater than 40°C
C. equal to 40°C
D. none of the above
Bitumen of grade 80/100 means______________?
Bitumen of grade 80/100 means______________?
A. its penetration value is 8 mm
B. its penetration value is 10 mm
C. its penetration value is 8 to 10 mm
D. its penetration value is 8 to 10 cm
Which of the following represents hardest grade of bitumen ?
Which of the following represents hardest grade of bitumen ?
A. 30/40
B. 60/70
C. 80/100
D. 100/120
The ductility value of bitumen for suitability in road construction should not be less than____________?
The ductility value of bitumen for suitability in road construction should not be less than____________?
A. 30 cm
B. 40 cm
C. 50 cm
D. 60 cm
The maximum allowable Los Angeles abrasion value for high quality surface course is_______________?
The maximum allowable Los Angeles abrasion value for high quality surface course is_______________?
A. 10%
B. 20 %
C. 30%
D. 45 %
In CBR test the value of CBR is calculated at_______________?
In CBR test the value of CBR is calculated at_______________?
A. 2.5 mm penetration only
B. 5.0 mm penetration only
C. 7.5 mm penetration only
D. both 2.5mm and 5.0 mm penetrations
Percentage of free carbon in bitumen is______________?
Percentage of free carbon in bitumen is______________?
A. more than that in tar
B. less than that in tar
C. equal to that in tar
D. none of the above
If aggregate impact value is 20 to 30 percent, then it is classified as_______________?
If aggregate impact value is 20 to 30 percent, then it is classified as_______________?
A. exceptionally strong
B. strong
C. satisfactory for road surfacing
D. unsuitable for road surfacing
Which of the following tests measures the toughness of road aggregates ?
Which of the following tests measures the toughness of road aggregates ?
A. crushing strength test
B. abrasion test
C. impact test
D. shape test