Highway Engineering

71. Gradient resistance of moving vehicles along down slopes, is

1. + 7 kg/tonne
2. + 9 kg/tonne
3. - 9 kg/tonne
4. - 7 kg/tonne

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72. Group index method of design of flexible pavement is

1. A theoretical method
2. An empirical method based on physical properties of sub-grade soil
3. An empirical method based on strength characteristics of sub-grade soil
4. A semi empirical method

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73. Hill roads are

1. Provided camber along spur curves
2. Provided camber along valley curves
3. Seldom provided a camber
4. None of these

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74. Horizontal curves on highways are provided

1. To break the monotony of driving
2. To discourage the tendency to increase speed
3. To decrease the mental strain on drivers
4. All the above

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75. I.R.T.D.A. (Indian Roads and Transport Development Association) was set up at Bombay in

1. 1907
2. 1917
3. 1027
4. 1937

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76. If A is the projected area of a vehicle in square metres, V is speed of the vehicles in kilometres per hour and C is a constant, then the wind resistance R to the moving vehicles, is given by

1. R = CAV
2. R = CAV²
3. R = CAV³
4. R = C²AV

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77. If a Lemniscate curve of transition throughout is introduced to connect two parallel roads, the maximum polar angle of the curve, is

1. 10°
2. 15°
3. 20°
4. 30°

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78. If aggregate impact value is 20 to 30 percent, then it is classified as

1. Exceptionally strong
2. Strong
3. Satisfactory for road surfacing
4. Unsuitable for road surfacing

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79. If At is the area of steel cross-section, t is working stress, L is width of road and W is weight of slab per square metre, the spacing of the tie bars for a longitudinal joint, is

1. (100 A_t × t)/WL
2. 100 A_t/tWL
3. (100 WA_t × t)/tL
4. 100 WL/A_tt

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80. If brakes of vehicles are effective, the vehicle-running at 30 km/hour comes to a stop in

1. 10 metres
2. 12 metres
3. 15 metres
4. 18 metres

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