# Objective Questions Civil Highway Engineering – Set 20

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## Q1. If the rate of change of grade permitted along a vertical curve is r and total change of grade is g%, the length L of the curve to be provided, is

(A) L = (r × 100/g) m
(B) L = (g × 100/r) m
(C) L = (r + g) × 100 m
(D) L = [100/(r + g)] m

Answer: (B) L = (g × 100/r) m

## Q2. 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

Answer: (D) 7 to 10 cm

## Q3. The period of long term plan for the development of roads in India, known as Bombay Plan (Aug. 1958), is

(A) 5 years
(B) 10 years
(C) 15 years
(D) 20 years

Answer: (D) 20 years

## Q4. The standard equation of a cubic parabolic transition curve provided on roads, is

(A) y = x3/6 RL
(B) y = x/6 RL
(C) y = l2/6 RL
(D) y = l3/6 RL

Answer: (A) y = x3/6 RL

(A) Plain
(B) Rolling
(C) Steep
(D) Mountainous

## Q6. California Bearing Ratio method of designing flexible pavements is more accurate as it involves

(A) Characteristics of soils
(B) Traffic intensities
(C) Character of the road making materials
(D) None of these

Answer: (C) Character of the road making materials

## Q7. The traffic carrying capacity of a single lane, depends on

(A) Type of the vehicles
(B) Level crossings
(D) All the above

Answer: (D) All the above

## Q8. 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

Answer: (A) 15 cm

## Q9. The absolute minimum radius of horizontal curve for a design speed 60 km ph is

(A) 131 m
(B) 210 m
(C) 360 m
(D) None of these

Answer: (D) None of these

## Q10. In complex situations, total time required for a driver to form a judgement and to act, may be taken as

(A) 1.0 sec
(B) 1.5 sec
(C) 2.0 sec
(D) 3.0 sec

Answer: (D) 3.0 sec

## Q11. 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

Answer: (B) 1 : 3 front batter

## Q12. If V is the design speed of vehicles in km/hour, the change of radial acceleration in meters/sec3, is

(A) 65/(70 + V)
(B) 60/(70 + V)
(C) 70/(65+ V)
(D) 70/(60 + V)

Answer: (C) 70/(65+ V)

## Q13. Full amount of extra width of a pavement on the curve, is provided at

(A) Beginning of the transition curve
(B) Centre of the transition curve
(C) Beginning of the circular curve
(D) Centre of the circular curve

Answer: (C) Beginning of the circular curve

## Q14. 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

Answer: (A) Tresguet did not provide the top camber for the drainage of surface water

## Q15. If the number of lanes on the carriageway of a road is more than two, the total width of lane ways is equal to 3.0 m

(A) + 0.60 m
(B) + 0.70 m
(C) + 0.90 m
(D) + 1.50 m

Answer: (B) + 0.70 m

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