Objective Questions Civil Highway Engineering - Set 20 - ObjectiveBooks

# Practice Test: Question Set - 20

1. An exceptional grade may be provided upto 1 in 12 along hill roads, if the length does not exceed
(A) 45 m per km
(B) 60 m per km
(C) 75 m per km
(D) 90 m per km

2. Shoulders for high traffic volume roads, should
(A) Be stable throughout the year to be used by vehicles in the case of emergency
(B) Support and protect the ends of carriage ways
(C) Not allow entrance of water to sub-grade
(D) All the above

3. If the designed speed on a circular curve of radius 1400 m is 80 km/hour, no super-elevation is provided, if the camber, is
(A) 4 %
(B) 3 %
(C) 2 %
(D) 1.7 %

4. If d is the thickness of a concrete pavement, the equivalent radius b of resisting section for an interior loading, is
(A) b = √(0.6 + d2) - 0.675 d
(B) b = √(1.6 + d2) + 0.675 d
(C) b = √(1.6 + d2) - 3.675 d
(D) b = √(1.6 + d2) - 0.675 d

5. Roughness index of roads, is expressed as
(A) Size of the stone on the pavement
(B) Number of patches on the pavement
(C) Cumulative deformation of surface per horizontal distance
(D) Type of the road surface

6. To indicate proper control of consistency of a freshly mixed concrete for pavement construction, the slump should be between
(A) 3 to 5 cm
(B) 4 to 6 cm
(C) 5 to 7 cm
(D) 7 to 10 cm

7. If the cross slope of a country is 25% to 60%, the terrain is classified as
(A) Plain
(B) Rolling
(C) Steep
(D) Mountainous

8. To prevent movement of moisture from sub-grade to road pavement at the same level as that of water-table, thickness of a cut off layer of coarse sand, is
(A) 15 cm
(B) 20 cm
(C) 30 cm
(D) 45 cm

9. Retaining walls are generally constructed with dry rubble stones with 60 cm top width and
(A) 1 : 2 front batter
(B) 1 : 3 front batter
(C) 1 : 4 front batter
(D) 1 : 5 front batter

10. Pick up the incorrect statement from the following:
(A) Tresguet did not provide the top camber for the drainage of surface water
(B) Tresguet provided the top camber for the drainage of surface water
(C) Telford provided two layers of stones in the central 5.4 m width and one layer was provided on the sides
(D) Macadam provided a camber to the formation at the dug-up state, to drain percolated water

11. In cement concrete pavements, tensile stress is due to:
(A) Bending or deflection under wheel loads
(B) Difference in temperature of the top and bottom of pavement
(C) Contraction of slab during falling temperature
(D) All the above

12. If L is the length of vehicles in meters, C is the clear distance between two consecutive vehicles (stopping sight distance), V is the speed of vehicles in km/hour, the maximum number N of vehicles/hour, is
(A) N = 1000 V / (L + C)
(B) N = (L + C) / 1000 V
(C) N = 1000 L / (C + V)
(D) N = 1000 C / (L + V)

13. Extra widening required at a horizontal curve on a single lane hill road of radius 80 m for a design speed of 50 kmph and for a vehicle with wheel base 6.0 m is
(A) 0.225 m
(B) 0.589 m
(C) 1.250 m
(D) None of these

14. When an up gradient of a highway meets a downgrade, the vertical curve provided, is known as
(A) Valley curve
(B) Sag curve
(C) Summit curve
(D) All the above

15. Customers prefer parking of their vehicles at
(A) 90° to aisles
(B) 85° to aisles
(C) 80° to aisles
(D) 75° to aisles