# Practice Test: Question Set - 21

**1. Parapet walls along hill roads, are provided**

- (A) To retain
the back filling

- (B) To
prevent the hill from sliding

- (C) To
prevent the wheels of the vehicle from coming on the retaining wall

- (D) None of
these

**2. An ideal vertical curve is**

- (A) True spiral

- (B) Cubic spiral

- (C) Cubic
parabola

- (D) None
of these

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

- (A) 1/10

- (B) 1/20

- (C) 1/30

- (D) 1/100

**4. If the ruling gradient on any highway is 3%, the gradient provided on the curve of 300 metre radius, is**

- (A) 2.00 %

- (B) 2.25 %

- (C) 2.50 %

- (D) 2.75 %

**5. If**

*P*is the number of vehicles per day at last census,*r*is the increase in traffic and*n*is the number of years passed after last census, number of vehicles*A*per day for design, is- (A)

*P*(1 +

*r*)

^{n}- (B)

*P*(1 -

*r*)

^{n}- (C)

*P*(1 +

*r*)

^{-n+5}

- (D)

*P*(1 +

*r*)

^{5n}

**6. 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

**7. 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

**8. 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

**9. If**

*V*

**is the design speed of vehicles in km/hour, the change of radial acceleration in meters/sec**

^{3}

**, is**

- (A) 65/(70 +

*V*)

- (B) 60/(70 +

*V*)

- (C) 70/(65+

*V*)

- (D) 70/(60 +

*V*)

**10. 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

**11. The convexity provided to the carriageway between the crown and edge of the pavement, is known as**

- (A) Super-elevation

- (B) Camber

- (C) Height
of the pavement

- (D) None of
these

**12. If**

*N*is the algebraic difference of grades,*S*is the minimum sight distance in metres, the length (*L*) of a summit curve is- (A)

*NS*/4

- (B)

*NS*

^{2}/4

- (C)

*N*

^{2}

*S*/4

- (D) (

*NS*)

^{2}/4

**13. If the elevations along a road increase, the slope of the road along the longitudinal direction, is known as**

- (A) Gradient

- (B) Grade

- (C) Positive
grade

- (D) Negative
grade

**14. Cement grouted pavement is classified as**

- (A) Rigid
pavement

- (B) Semi-rigid
pavement

- (C) Flexible
pavement

- (D) None of
these

**15. Non-passing sight distance along a road is the longest distance at which the driver of a moving vehicle, may see an obstacle on the pavement**

- (A) 10 cm high

- (B) 25 cm high

- (C) 50 cm high

- (D) 100 cm high

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