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Highway Engineering

Highway Engineering
Bottom most layer of pavement is known as

subgrade
wearing course
sub-base course
base course

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Highway Engineering
If ruling gradient is I in 20 and there is also a horizontal curve of radius 76 m, then the compensated grade should be

6%
4%
5 %
3 %

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

exceptionally strong
satisfactory for road surfacing
strong
unsuitable for road surfacing

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Highway Engineering
When two equally important roads cross roughly at right angles, the suitable shape of central island is

elliptical
tangent
circular
turbine

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Highway Engineering
The function of an expansion joint in rigid pavements is to

Relieve warping stresses
Resist stresses due to expansion
Relieve shrinkage stresses
Allow free expansion

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Highway Engineering
When the bituminous surfacing is done on already existing black top road or over existing cement concrete road, the type of treatment given is

Tack coat
Spray of emulsion
Seal coat
Prime coat

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