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GATE CE 2020 Transport Engg. & Survey Quiz 5

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Question 1

During midnight in summer the stresses of a pavement are as follows; load stress = 15 kg/cm2, warping stress = 11.5 kg/cm2 and frictional stresses are 3 kg/cm2. Determine the critical stress at the top of the pavement.

Question 2

In a dual wheel assembly if P is equal to each wheel load, S is centre to centre distance of dual wheels and d is the distance between walls of wheels then

Question 3

The spacing between the contraction joints of a cement concrete pavement is 4.8 m. if the coefficient of friction between the bottom of pavement and the supporting layer is 1.25 and unit weight of cement concrete is 2500 kg/m³, then the tensile stress developed in the cement concrete pavement due to contraction (in kg/cm²) is

Question 4

The warping stress at corner during night of a 30 cm thick cement concrete pavement with transverse joints at 5.0 m interval and longitudinal joints at 4.0 m interval is _________kg/cm³.
The modulus of subgrade reaction, is 7.6 kg/cm³ and radius of loaded area is 16 cm.
[Assume maximum temperature differential of 0.5℃ per cm slab thickness during the night, ∝ = 10 x 10^-6 per℃, E = 3.5 x 10⁵ kg/cm² and μ = 0.15]

Question 5

The equivalent radius resisting section of 20 cm slab, if the ratio of radius of wheel load distribution to thickness of slab is 0.73 is

Question 6

The radii of relative stiffness of the rigid pavements P and Q are denoted by

and

, respectively. The geometric and material properties of the concrete slab and underlying soil are given below:

The ratio (up to one decimal place) of

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ESE & GATE CE Highway Engineering

Dec 20ESE & GATE CE