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GATE CE 2020 Transport Engg. & Survey Quiz 3 (App update required to attempt this test)
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Question 1
A valley curve has a descending gradient of 1 in 30 followed by an ascending of 1 in 50. The length of the valley curve required for a design speed of 80 kmph for comfort condition is ________ m. take C = 0.6 m/s2
Question 2
While aligning a hill road with a ruling gradient of 6 %, a horizontal curve of radius 50 m is encountered. The grade compensation (in percentage, up to two decimal places) to be provided for this case would be _____
Question 3
For a portion of a highway, a descending gradient of 1 in 30 meets an ascending gradient of 1 in 20. A valley curve needs to be designed for a velocity of 100 kmph based on
1). Headlight sight distance equal to stopping sight distance of level terrain. Consider the length of the curve > SSD.
2). Comfort condition if the rate of change of acceleration is 0.6 m/s3.
[Take Reaction time = 2.5 sec, coefficient of longitudinal friction, μ = 0.36, height of headlight = 0.75 m and beam angle = 1 °]
What is the length (in m) of the valley curve?
1). Headlight sight distance equal to stopping sight distance of level terrain. Consider the length of the curve > SSD.
2). Comfort condition if the rate of change of acceleration is 0.6 m/s3.
[Take Reaction time = 2.5 sec, coefficient of longitudinal friction, μ = 0.36, height of headlight = 0.75 m and beam angle = 1 °]
What is the length (in m) of the valley curve?
Question 4
A parabolic summit curve for a national highway is to be designed for a stopping sight distance of 210 m at the junction of a rising gradient of 1 in 60 and a falling gradient of 1 in 40. The profile of the curve is ___. (where 'x' is the horizontal distance from the start of the summit curve).
Question 5
A national highway passing through rolling terrain in heavy rainfall area has a horizontal curve of radius 450 m. For rolling in heavy rainfall area, the following data may be assumed as per standard practice:
Ruling design speed, V = 80 kmph
Normal pavement width, W = 7.0 m
Allowable rate of introduction of superelevation = 1 in 150
Also assume two lanes, wheel base of 6 m and pavement is rotated about inner edge. Neglect extra widening effect.
What is the length (in m) of transition curve?
Ruling design speed, V = 80 kmph
Normal pavement width, W = 7.0 m
Allowable rate of introduction of superelevation = 1 in 150
Also assume two lanes, wheel base of 6 m and pavement is rotated about inner edge. Neglect extra widening effect.
What is the length (in m) of transition curve?
Question 6
A vehicle moves at a speed of 20 m/s. Determine the length in metre of the transition curve for smooth transition from straight road to a curve of radius 275 m. (Correct upto two decimal places). Consider the terrain as flat.
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Oct 14ESE & GATE CE
