# 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

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

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

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

(A) 15 cm
(B) 20 cm
(C) 30 cm
(D) 45 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

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

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

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