Highway Engineering

291. The suitable surfacing material for a bridge deck slab is

1. Sheet asphalt
2. Bituminous carpet
3. Mastic asphalt
4. Rolled asphalt

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292. The tangent length of a simple circular curve of radius R

1. R tanθ
2. R tanθ/2
3. R sinθ
4. R sinθ/2

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293. The thickness of bituminous carpet varies from

1. 20 to 25 mm
2. 50 to 75 mm
3. 75 to 100 mm
4. 100 to 120 mm

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294. The top height of a route marker above crown level is

1. 1.50 m
2. 1.75 m
3. 2.00 m
4. 2.25 m

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295. The total length of a valley formed by two gradients - 3% and + 2% curve between the two tangent points to provide a rate of change of centrifugal acceleration 0.6 m/sec2, for a design speed 100 kmph, is

1. 16.0 m
2. 42.3 m
3. 84.6 m
4. None of these

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296. The total value of extra widening required at a horizontal curve on a two lane hill road of radius 42 m for a design speed of 50 kmph and for vehicles with wheel base 6 m, is

1. 0.500 m
2. 0.589 m
3. 1.089 m
4. 0.089 m

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297. The traffic carrying capacity of a single lane, depends on

1. Type of the vehicles
2. Level crossings
3. Road intersections
4. All the above

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298. The traffic manoeuvre means

1. Diverging
2. Merging
3. Crossing
4. All the above

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299. The type of curves generally provided on highways, is

1. Critical curve
2. Transition curve
3. Vertical curve
4. All the above

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300. The type of transition curves generally provided on hill roads, is

1. Circular
2. Cubic parabola
3. Lemniscate
4. Spiral

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