Civil Engineering - Highway Engineering

26. 

Pick up the incorrect statement from the following:

A. Highways are always constructed in straight line
B. Highways may be provided horizontal curves
C. Highways may be provided vertical curves
D. Highways may be provided both horizontal and vertical curves.

Answer: Option A

Explanation:

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27. 

If the width of carriage way is 12.5 metres, outer edge 50 cm higher than the inner edge, the required super elevation is

A. 50 cm
B. 1 in 25
C. 1 in 400
D. 1 in 40
E. 1 in 24

Answer: Option B

Explanation:

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28. 

In cement concrete pavements, tensile stress is due to :

A. bending or deflection under wheel loads
B. difference in temperature of the top and bottom of pavement
C. contraction of slab during falling temperature
D. all the above.

Answer: Option D

Explanation:

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29. 

If L is the length of the transition curves provided on either side of a circular curve of radius R, the maximum angle of deflection with tangent for the junctions of the transition curve and circular curve, is

A. L/R
B. L/2R
C. L/3R
D. L/4R
E. none of these.

Answer: Option E

Explanation:

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30. 

Interior thickness of concrete road slab for design wheel load 6300 kg and permissible flexural stress 21 kg/cm2, is

A. 17.0 cm
B. 25.5 cm
C. 34.0 cm
D. 42.5 cm
E. 50.0 cm

Answer: Option B

Explanation:

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