# Practice Test: Question Set - 15

**1. Reduction of load capacity in a ruling gradient of**

- (A) 1 in 10, is
10%

- (B) 1 in 15, is
15%

- (C) 1 in 20, is
10%

- (D) 1 in 25, is
25%

**2. The width of road pavements, depends upon**

- (A) Width
of traffic lane

- (B) Number of
traffic

- (C) Width of
median strip

- (D) All the
above

**3. While calculating the overtaking sight distance, the height of the object above road surface, is assumed**

- (A) 50 cm

- (B) 70 cm

- (C) 100 cm

- (D) 120 cm

**4. Minimum thickness of the base of a flexible pavement, is**

- (A) 10 cm

- (B) 15 cm

- (C) 20 cm

- (D) 25 cm

**5. Widening of the roads on curves in hilly region, is done**

- (A) On the outer
side

- (B) On the inner
side

- (C) On the outer
and inner sides equally

- (D) Less on
outer side and more on inner side

**6. The wall constructed for the stability of a back filling portion of a road on the downhill side, is known as**

- (A) Retaining
wall

- (B) Breast wall

- (C) Parapet wall

- (D) All the
above

**7. If**

*V*is speed of a moving vehicle,*r*is radius of the curve,*g*is the acceleration due to gravity,*W*is the width of the carriageway, the super elevation is- (A)

*WV*/

*gr*

- (B)

*W*

^{2}

*V*/

*gr*

- (C)

*WV*

^{2}/

*gr*

- (D)

*WV*/

*gr*

^{2}

**8. Side drains on both sides of a hill road, are essential when the road is**

- (A) Along the
spur curves

- (B) Along the
re-entrant curves

- (C) In cutting

- (D) None of
these

**9. In a right angle bend of a road provided with a transition throughout, the maximum polar angle will be**

- (A) 10°

- (B) 15°

- (C) 20°

- (D) 30°

**10. If**

*V*is the design speed in km/hour and*R*is the radius of the curve of a hill road, the super-elevation- (A)

*e*=

*V*/ 127

*R*

- (B)

*e*=

*V*

^{2}/ 127

*R*

- (C)

*e*=

*V*

^{2}/ 225

*R*

- (D)

*e*=

*V*/ 225

*R*

**11. Along a hill road, a side drain is provided on**

- (A) Outer side
of a spur curve

- (B) Outer side
of a re-entrant curve

- (C) Outer side
of both (

*a*) and (

*b*)

- (D) Inner side
of both (

*a*) and (

*b*)

**12. The total length of a valley formed by two gradients - 3% and + 2% curve between the two tangent points to provide a rate of change of centrifugal acceleration 0.6 m/sec**

^{2}, for a design speed 100 kmph, is- (A) 16.0 m

- (B) 42.3 m

- (C) 84.6 m

- (D) None of
these

**13. If**

*V*is speed in km/hour and*R*is radius of the curve, the super-elevation*e*is equal to- (A)

*V*

^{2}/125

*R*

- (B)

*V*

^{2}/225

*R*

- (C)

*V*

^{2}/325

*R*

- (D)

*V*

^{2}/25

*R*

**14. The weaving length of a roadway is the distance**

- (A) Between the
channelizing islands

- (B) Equal to
half circumference

- (C) Equal to
total width of adjoining radial roads

- (D) Equal to
diameter of rotary

**15. Following type of pavement is generally known as flexible pavement**

- (A) Water-bound
macadam roads

- (B) Stabilized
soil roads

- (C) Road
constructed with various layers of building material well compacted

- (D) All the
above

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