# Civil Engineering - GATE Exam Questions

### Exercise :: GATE Exam Questions - Section 1

16.

The Prandtl mixing length for turbulent flow through pipes is

 A. independent of shear stress B. a universal constant C. zero at the pipe wall D. independent of radial distance from pipe axis

Explanation:

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17.

A 40° slope is excavated to a depth of 10 m in a deep layer of saturated clay of unit weight 20 kN.m3; the relevant shear strength parameters are cu = 70 kN/m2 and φu = 0. The rock ledge is at a great depth. The Taylor's stability coefficient for φu = 0 and 40° slope angle is 0.18. The factor of safety of the slope is :

 A. 2 B. 2.1 C. 2.2 D. 2.3

Explanation:

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18.

Lysimeter and Tensiometer are used to measure respectively, one of the following groups of quantities :

 A. Capillary potential and permeability B. Evapotranspiration and capillary potential C. Velocity in channels and vapour pressure D. Velocity in pipes and pressure head

Explanation:

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19.

The ruling minimum radius of horizontal curve of a national highway in plain terrain for ruling design speed of 100 km/hour with e = 0.07 and f = 0.15 is close to

 A. 250 m B. 360 m C. 36 m D. 300 m

Explanation:

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20.

Principle involved in the relationship between submerged unit weight and saturated weight of a soil is based on

 A. Equilibrium of floating bodies B. Archimedes' principle C. Stokes' law D. Darcy's law