WorksheetsDay 48-Nov 8-worksheet-Btech-Highway materials
Total questions: 15
Worksheet time: 10mins
In AASHTO soil classification, soils A1 to A3 are categorized as —
Fine-grained soils
Highly plastic clays
Granular soils
Peaty soils
In the CBR test, the correct criterion for good soil is —
CBR(5 mm) > CBR(2.5 mm)
CBR(2.5 mm) > CBR(5 mm)
CBR values equal
Load increases linearly
Modulus of subgrade reaction is determined using —
CBR test
Plate bearing test
Impact test
Soundness test
For bituminous concrete, the maximum permitted Los Angeles abrasion value is —
50%
40%
35%
30%
Flakiness Index is percentage by weight of particles whose least dimension is ————- of mean dimension
(a)
Rapid curing (RC) cutback bitumen uses which solvent?
Kerosene
Diesel oil
Light fuel oil
Naphtha
Tar is obtained by destructive distillation of coal or wood.
True
False
Specific gravity of aggregates should ideally lie between 2.5 and 3.0.
True
False
In the CBR test, the standard load at 5 mm penetration is how many kilograms?
(a)
Modulus of subgrade reaction 'k' is expressed in which units?
kg/cm^3
kN/m^2
kg/cm
MPa
Elongation Index uses which gauge for measurement?
(a)
Pensky–Marten is used to test—————— of bitumen
(a)
Which of the following statements are correct about Aggregate Crushing Value (ACV)?
1. ACV < 10% indicates exceptionally strong aggregate.
2. ACV > 35% indicates very weak aggregate.
3. ACV for surface course should not exceed 30%.
4. ACV for base course must be less than 20%.
1, 2, 3
1 and 3 only
2 and 4 only
1, 3, 4
In the —————,the hammer is dropped from a height of 380 millimetres
(a)
A stone sample gives a Toughness Number (TN) of 12 in the Page Impact Test. How is the stone classified?
Not tough
Moderately tough
Very tough
Strong
