69.

70.

71.

72.

73.

74.

From the statements given below, choose the wrong one with respect to Lacey’s regime
channels :

(A) Regime theory is not applicable to channels in initial regime

(B) Regime theory is applicable to channels which are either in true regime or in final
regime

(0 Coarser the silt, more nearly the section attains a semi circle

(D) Channels flowing through the alluvium has the tendency to assume a semi
elliptical section

A silty soil is having specific gravity (G) equal to 2.60 and porosity equal to 50%. The void
ratio for the soil is 1.00 and bulk density is 14kN/m°. The critical exit gradient for the soil is :

(ಸ) 0.00 (B) 0.80
(C) 2.40 (D) 3.20

The rate of change of centrifugal acceleration for the design speed of 78 kmph in designing
transition curve is :

(A) 0.504 (B) 0.490
(C) 0.495 (D) 0.510

If ruling gradient is 1 in 25 and there is also a horizontal curve of radius 100 m, then
compensated grade should be :

(A) 3.00% (B) 3.05%
(C) 3.90% (D) 3.25%

If the tyre pressure is 0.56 and Mpa and wheel load is 40 kN then the radius of tyre contact
area is:

(^) 20.04 cm (8) 15.07 ‏حص‎
‎(0 16.07 का (D) 16.00 ൩

Mixer of coarser filler material with bitumen to remove any internal voids is called as :
(A) Modified bitumen (B) Modified asphalt
(C) Mastic asphalt ൯൩) Straight-run bitumen

085/2023 14 A