Transportation Engineering (Test 3)

Gate Exam : Ce Civil Engineering

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Transportation Engineering

Transportation Engineering
| Transportation Engineering |
Q.1
As per IRC : 67 : 2001, a traffic sign indicating the Speed Limit on a road should be of
A. Circular Shape with white Background and Red Border
B. Triangular Shape with White Background and Red Border
C. Triangular Shape with Red Background and White Border
D. Circular Shape with Red Background and White Border
Answer : Option A
Explaination / Solution:
No Explaination.


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Q.2
A runway is being constructed in a new airport as per the International Civil Aviation Organization (ICAO) recommendations. The elevation and the airport reference temperature of this airport are 535 m above the mean sea level and 22.65°C, respectively. Consider the effective gradient of runway as 1%. The length of runway required for a design-aircraft under the standard conditions is 2000 m. Within the framework of applying sequential corrections as per the ICAO recommendations, the length of runway corrected for the temperature is
A. 2223 m
B. 2250 m
C. 2500 m
D. 2750 m
Answer : Option C
Explaination / Solution:



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Q.3
A super-elevation e is provided on a circular horizontal curve such that a vehicle can be stopped on the curve without sliding. Assuming a design speed v and maximum coefficient of side friction fmax, which one of the following criteria should be satisfied?
A. e ≤ fmax
B. e > fmax
C. no limit on e can be set
D. e = (1 - (fmax)2)/fmax
Answer : Option A
Explaination / Solution:



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Q.4
Consider the following statements in the context of geometric design of roads. 
I : A simple parabolic curve is an acceptable shape for summit curves 
II : Comfort to passengers is an important consideration in the design of summit curves. 
The correct otption evaluating the above statements and their relationship is
A. I is true, II is false
B. I is true, II is true, and II is the correct reason for I
C. I is true, II is true, and II is NOT the correct reason for I
D. I is false, II is true
Answer : Option A
Explaination / Solution:
No Explaination.


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Q.5
The accuracy of an Electronic Distance Measuring Instrument (EDMI) is specified as ± (a mm + b ppm). Which one of the following statements is correct?
A. Both a and b remain constant, irrespective of the distance being measured.
B. a remains constant and b varies in proportion to the distance being measured.
C. a varies in proportion to the distance being measured and b remains constant.
D. Both a and b vary in proportion to the distance being measured.
Answer : Option B
Explaination / Solution:

Accuracy of EDMI is generally stated in terms of constant instrument error and measuring error proportional to distance being measured. ± (a mm + b ppm) The first part in this expression indicates a constant instrument error that is independent of length of line measured. Second component is distance related error.

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Q.6
The design speed for a two-lane road is 80 km/h . When a design vehicle with a wheelbase of 6.6 m is negotiating a borizontal curve on that road, the off-tracking is measured as 0.096 m. The required widening of carriageway of the two-lane road on the curve is approximately
A. 0.55 m
B. 0.65 m
C. 0.75 m
D. 0.85 m
Answer : Option C
Explaination / Solution:
No Explaination.


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Q.7
Consider the following statements in the context of cement concrete pavements 
I : Warping stresses in cement concrete pavements are saused by the seasonal variation in temperature. 
II : Tie bars are generally provided across transverse joints of cement concrete pavements. 
The correct option evaluating the above statements is
A. I true II False
B. I False II True
C. I True II True
D. I False II False
Answer : Option D
Explaination / Solution:
No Explaination.


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Q.8
The queue length (in number of vehicles) versus time (in seconds) plot for an approach to a signalized intersection with the cycle length of 96 seconds is shown in the figure (not drawn to scale).

At time t = 0, the light has just turned red. The effective green time is 36 seconds, during which vehicles discharge at the saturation flow rate, s (in vph). Vehicles arrive at a uniform rate v (in vph), throughout the cycle. Which one of the following statements is TRUE?

A. v = 600 vph, and for this cycle, the average stopped delay per vehicle = 30 seconds
B. s = 1800 vph, and for this cycle, the average stopped delay per vehicle = 28.125 seconds
C. v = 600 vph, and for this cycle, the average stopped delay per vehicle = 45 seconds
D. s = 1200 vph, and for this cycle, the average stopped delay per vehicle = 28.125 seconds
Answer : Option B
Explaination / Solution:
No Explaination.


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Q.9
The radius of a horizontal circular curve on a highway is 120 m. The design speed is 60 km/hour, and the design coefficient of lateral friction between the tyre and the road surface is 0.15. The estimated value of superelevation required (if full lateral friction is assumed to develop), and the value of coefficient of friction needed (if no superelevation is provided) will, respectively, be
A. 1/11.6 and 0.10
B. 1/10.5 and 0.37
C. 1/11.6 and 0.24
D. 1/12.9 and 0.24
Answer : Option C
Explaination / Solution:



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CE Civil Engineering