Highway Engineering

51. Floating gradients are generally provided

1. Along maximum gradients
2. Along minimum gradients
3. At summit curves
4. At valley curves

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52. Following type of pavement is generally known as flexible pavement

1. Water-bound macadam roads
2. Stabilised soil roads
3. Road constructed with various layers of building material well compacted
4. All the above

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53. For a 6.6 m wide two lane pavement, berms are provided on either side having a width of

1. 1.00 m
2. 1.25 m
3. 1.50 m
4. 1.75 m

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54. For a comfortable travel on Highways, the centrifugal ratio should not exceed

1. 0.10
2. 0.15
3. 0.20
4. 0.25

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55. For a poorly graded sub-grade soil, thickness of sub-base, is

1. 10 cm
2. 15 cm
3. 20 cm
4. 30 cm

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56. For a properly designed vehicle, the resistance generally ignored, is

1. Wind resistance
2. Rolling resistance
3. Grade resistance
4. Axle resistance

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57. For a vehicle moving with a speed of 80 km per hour, the brake reaction time, in ordinary cases, is

1. 1 sec
2. 1.5 sec
3. 2.0 sec
4. 2.5 sec

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58. For calculating the tractive force along an upgrade of an asphalt road, the most probable value of the co-efficient of traction resistance is assumed

1. 43739
2. 43831
3. 10959
4. 1/100

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59. For clear distinct vision, images of obstructions should fall on the retina with a cone of

1. 2°
2. 3°
3. 4°
4. 5°

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60. For Indian conditions, the water bound macadam roads, are suitable if daily traffic does not exceed

1. 2000 tonnes
2. 2500 tonnes
3. 3000 tonnes
4. 3500 tonnes

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