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SSC JE 2019-20: Transportation Engg. Quiz-4

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Question 1

Camber is provided on the roads to

1) Prevent the entry of surface water into the subgrade soil through pavement.

2) Prevent entry of water into the bituminous layers.

3) To remove the water from pavement surface at eh earliest so that the skid resistance of pavement is recouped fast.

Of the above statements

Question 2

For a design speed of 100 kmph, if the deviation angle of valley curve is 1/25, then the length of a curve for comfort consideration is nearly. (Given c = 0 .516)

Question 3

If a descending gradient of 1 in 30 meets an ascending gradient of 1 in 40, then the length of valley curve required for a headlight sight distance of 150 m will be.

Question 4

In a light rainfall region with WBM pavement, 10.5m road is to be constructed. Then the height of crown with respect to the edges is _____mm.

Question 5

Consider the following statements related to Ruling gradient:

(i) Ruling gradient is the minimum gradient which must be provided to design the vertical profile of the road.

(ii) IRC has recommended Ruling gradient value of 1 in 30 on mountainous terrain.

Which of the above statements are true?

Question 6

Consider the following statements related to summit curves:

(i) Summit curves also known as crest curves have upward convexity.

(ii) Summit curves are mainly designed for impact free movement of vehicles at design speed.

(iii) Adequate sight distance must be provided throughout the length of summit curves.

(iv) Simple parabola is the ideal shape for summit curve

Which of the above statements are correct?

Question 7

Statement 1: Comfort of the passengers is the prime consideration while designing valley curves.

Statement 2: Adequate head light sight distance should be available throughout the length of curve for night driving.

Question 8

Generally preferred shape for vertical valley curves is

Question 9

The rate of change of gradient, in case of summit curves and sag curves respectively, should not exceed

Question 10

The equation for parabolic summit curve is given by:

Find the value of “a” for a summit curve if the deviation angle is 4.5% and length of the curve is 240 m

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Feb 11ESE & GATE CE