GATE CE Transportation Infrastructure PYQs & Answers — Page 2

Questions 11–20 of 50. Imported answers require independent review unless marked reviewed.

Road A and Road B are joined by a circular horizontal curve of radius 200 m as shown in the figure. Road A and Road B are tangent to the curve at the points C and D, respectively. Had the curve not been there, straight roads A and B would have met at the point E. The distance from C to E is 92 m. The value of angle

(in degrees) is __________ (rounded off to 1 decimal place).

Note: The value of angle

is to be calculated only from the consideration of Euclidean geometry and the data given in the problem.

Diagram for Civil Engineering question 35

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On a two-lane highway, a horizontal curve of radius 300 m is provided. The design speed is 80 km/h.

If the long wheelbase of vehicle expected on this highway is 7 m, then the extra widening required (in m) is ______ (round off to two decimal places).

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A car is traveling at a speed of 60 km/hr on a section of a National Highway having a downward gradient of 2%. The driver of the car suddenly observes a stopped vehicle on the car path at a distance 130 m ahead, and applies brake. If the brake efficiency is 60%, coefficient of friction is 0.7, driver’s reaction time is 2.5 s, and acceleration due to gravity is 9.81 m/s², the distance (in meters) required by the driver to bring the car to a safe stop lies in the range

Your answerChoose one option.

126 to 130

41 to 45

33 to 37

75 to 79

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As per the International Civil Aviation Organization (ICAO), the basic runway length is increased by x (%) for every y (m) raise in elevation from the Mean Sea Level (MSL). The values of x and y, respectively, are

Your answerChoose one option.

7% and 300 m

5% and 200 m

4% and 500 m

10% and 1000 m

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The longitudinal sections of a runway have gradients as shown in the table.

End to end for sections of runway (m)	Gradient (%)
0 to 200	+1.0
200 to 600	−1.0
600 to 1200	+0.8
1200 to 1600	+0.2
1600 to 2000	−0.5

Consider the reduced level (RL) at the starting point of the runway as 100 m. The effective gradient of the runway is

Your answerChoose one option.

0.02%

0.35%

0.28%

0.18%

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In general, the outer edge is raised above the inner edge in horizontal curves for

Your answerChoose one option.

Highways, Railways, and Taxies

Highways and Railways only

Railways and Taxies only

Highways only

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The number of trains and their corresponding speeds for a curved Broad Gauge section with 437 m radius, are

• 20 trains travel at a speed of 40 km/hr • 15 trains travel at a speed of 50 km/hr • 12 trains travel at a speed of 60 km/hr • 8 trains travel at a speed of 70 km/hr • 3 trains travel at a speed of 80 km/hr

If the gauge (center-to-center distance between the rail heads) is taken as 1750 mm, the required equilibrium cant (in mm) will be ____________ (rounded off to the nearest integer).

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A horizontal curve of radius 1080 m (with transition curves on either side) in a Broad Gauge railway track is designed and constructed for an equilibrium speed of 70 kmph. However, a few years after construction, the Railway Authorities decided to run express trains on this track. The maximum allowable cant deficiency is 10 cm.

The maximum restricted speed (in kmph) of the express trains running on this track is ______________ (rounded off to the nearest integer).

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A vertical summit curve on a freight corridor is formed at the intersection of two gradients, +3.0% and −5.0%.

Assume the following: Only large-sized trucks are allowed on this corridor Design speed = 80 kmph Eye height of truck drivers above the road surface = 2.30 m Height of object above the road surface for which trucks need to stop = 0.35 m Total reaction time of the truck drivers = 2.0 s Coefficient of longitudinal friction of the road = 0.36 Stopping sight distance gets compensated on the gradient

The design length of the summit curve (in meters) to accommodate the stopping sight distance is __________ (rounded off to 2 decimal places).

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and

are the slopes of the approach and departure grades of a vertical curve, respectively.

Given

and

Statement 1:

followed by

results in a sag vertical curve. Statement 2:

followed by

results in a sag vertical curve. Statement 3:

followed by

results in a crest vertical curve.

Which option amongst the following is true?

Your answerChoose one option.

Statement 1 and Statement 3 are correct; Statement 2 is wrong

Statement 1 and Statement 2 are correct; Statement 3 is wrong

Statement 1 is correct; Statement 2 and Statement 3 are wrong

Statement 2 is correct; Statement 1 and Statement 3 are wrong

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GATE CE Transportation Infrastructure PYQs

Question 35

Question 64

Question 22

Question 23

Question 27

Question 28

Question 62

Question 62

Question 63

Question 21