Civil Engineering - Highway Engineering

31. 

If R is the radius of a main circular curve, Δ is the angle of deflection and α is the polar deflection angle of any point, its radial distance is

A. 3 R sin Δ/3 sin 2α
B. 3 R sin Δ/2 sin 3α
C. 3 R sin Δ/3 sin α/2
D. 3 R sin 2Δ sin α

Answer: Option A

Explanation:

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32. 

Super-elevation on roads in snow bound areas, should generally not exceed

A. 15%
B. 12%
C. 10%
D. 7%
E. 6%

Answer: Option D

Explanation:

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33. 

If the width of a pavement slab is 7.5 m, thickness 20 cm and working stress 1400 kg/cm2, spacing of 10 mm tie bars for the longitudinal joint, is

A. 10 cm
B. 20 cm
C. 30 cm
D. 40 cm
E. 50 cm

Answer: Option C

Explanation:

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34. 

Minimum number of 50 kg cement bags per cubic metre of concrete for a mix corresponding to crushing strength 280 kg/cm2 at 28 days, are

A. 5.0
B. 6.5
C. 7.0
D. 7.5
E. 8.0

Answer: Option B

Explanation:

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35. 

Three points, A, B and C 500 m apart on a straight road have 500 m, 505 m and 510 m as their reduced levels. The road is said to have

A. no gradient between A and C
B. a positive gradient between A and C
C. a negative gradient between A and C
D. a negative gradient between A and B
E. a positive gradient between A and B followed by a negative gradient between B to C.

Answer: Option E

Explanation:

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