# Practice Test: Question Set - 11

**1. A single lane carriage way whenever changes to two-lane carriage way, is affected through a taper of**

- (A) 1 in 10

- (B) 1 in 15

- (C) 1 in 20

- (D) 1 in 15 to 1
in 20

**2. If**

*N*is deviation angle, the length*L*, of a parabolic vertical curve for safe stopping distance*S*, is- (A) NS

^{2}/4.4 if

*L*>

*S*

- (B) 2

*S*- 4.4/

*N*if

*L*<

*S*

- (C) 2

*S*- 4.4/

*N*if

*L*>

*S*

- (D) Both (

*a*) and (

*b*)

**3. Softening point of bitumen to be used for read construction at a place where maximum temperature is 40°C should be**

- (A) Less than
40°C

- (B) Greater than
40°C

- (C) Equal to
40°C

- (D) None of the
above

**4. According to IRC : 52-1973, for a single lane National Highway in hilly region,**

- (A) Width of the
carriageway must be 3.75 m

- (B) Shoulders on
either side must be 1.25 m

- (C) Total
width of the road-way must be 6.25 m

- (D) All of the
above

**5. If a Lemniscate curve of transition throughout is introduced to connect two parallel roads, the maximum polar angle of the curve, is**

- (A) 10°

- (B) 15°

- (C) 20°

- (D) 30°

**6. Minimum thickness of a layer of fine sand required to cut off capillary rise of water completely, should be**

- (A) 40 cm

- (B) 52 cm

- (C) 64 cm

- (D) 76 cm

**7. The standard equation of a cubical spiral transition curve provided on roads, is**

- (A)

*y*=

*l*

^{2}/6

*RL*

- (B)

*y*=

*x*

^{3}/6

*RL*

- (C)

*y*=

*x*

^{2}/6

*RL*

- (D)

*y*=

*x*/6

*RL*

**8. If**

*N*is the algebraic difference of grades,*S*is the head light beam distance in metres, the length (*L*) of a valley curve, is- (A) NS

^{2}/4

- (B) NS

^{2}/6

- (C) NS

^{2}/9.6

- (D) NS

^{2}/4.8

**9. To prevent compressive stresses in a rigid concrete pavement, the joint provided, is**

- (A) Expansion
joint

- (B) Contraction
joint

- (C) Hinged joint

- (D) All the
above

**10. Along high ways confirmatory route markers are generally fixed**

- (A) Before the
crossing on the left side

- (B) After the
crossing on the left side

- (C) Before the
crossing on the right side

- (D) After the
crossing on the right side

**11. If the width of carriage way is 12.5 meters, outer edge 50 cm higher than the inner edge, the required super elevation is**

- (A) 50 cm

- (B) 1 in 25

- (C) 1 in 400

- (D) 1 in 40

**12. If**

*N*

**is the net difference of grades,**

*S*

**is the minimum overtaken sight distance in meters, the length (**

*L*

**) of a summit curve, is**

- (A)

*NS*/4

- (B) NS

^{2}/4

- (C) NS

^{2}/4.8

- (D) NS

^{2}/9.6

**13. Super-elevation on roads in snow bound areas, should generally not exceed**

- (A) 15 %

- (B) 12 %

- (C) 10 %

- (D) 7 %

**14. Passing zones are generally not provided on**

- (A) Summit
curves

- (B) Horizontal
curves

- (C) Two lane highways

- (D) All the
above

**15. In a braking test, a vehicle traveling at 36 km ph was stopped at a braking distance of 8.0 m. The average value of the vehicle's skid resistance (friction coefficient) is**

- (A) 0.64

- (B) 6.25

- (C) 0.16

- (D) None of
these

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