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GATE 2019 Transportation Engineering Day 7 Quiz
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Question 1
If the self-weight of the pavement slab is considered, the temperature stresses at the top of the slab during night time will be
Question 2
The variation of rigidity factor for a tyre pressure is stated as:
Question 3
Consider the following statements in the context of cement concrete pavements.
I: Warping stresses in cement concrete pavements are caused 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 statement is
I: Warping stresses in cement concrete pavements are caused 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 statement is
Question 4
Using IRC: 37 - 1984 “Guidelines for the Design of Flexible Pavements” and the following data, choose the total thickness of the pavement.
No. of commercial vehicles when construction is completed= 2723 veh/day
Annual growth rate of the traffic = 5.0%
Design life of the pavement = 10 years
Vehicle damage factor = 2.4
CBE value of the subgrade soil = 5%
Data for 5% CBR value
No. of commercial vehicles when construction is completed= 2723 veh/day
Annual growth rate of the traffic = 5.0%
Design life of the pavement = 10 years
Vehicle damage factor = 2.4
CBE value of the subgrade soil = 5%
Data for 5% CBR value
Question 5
A subgrade soil sample was tested using standard CBR apparatus and the observations are given below
Assuming that the load-penetration curve is convex throughout, the CBR value (%) of the sample is
Assuming that the load-penetration curve is convex throughout, the CBR value (%) of the sample is
Question 6
For a portion of national highway where a descending gradient of 1 in 25 meets with an ascending gradient of 1 in 20, a valley curve needs to be designed for a vehicle travelling at 90 kmph based on the following conditions.
(i) headlight sight distance equal to the stopping sight distance (SSD) of a level terrain considering length of valley curve > SSD.
(ii) comfort condition with allow ablerate of change of centrifugal acceleration = 0.5 m/sec3.
Assume total reaction time = 2.5 seconds; coefficient of longitudinal friction of the pavement = 0.35; height of head light of the vehicle = 0.75 m; and beam angle = 1 °.
(i) headlight sight distance equal to the stopping sight distance (SSD) of a level terrain considering length of valley curve > SSD.
(ii) comfort condition with allow ablerate of change of centrifugal acceleration = 0.5 m/sec3.
Assume total reaction time = 2.5 seconds; coefficient of longitudinal friction of the pavement = 0.35; height of head light of the vehicle = 0.75 m; and beam angle = 1 °.
What is the length of valley curve (in m) based on the head light sight distance condition? _________
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Jul 14ESE & GATE CE
