Civil Engineering - GATE Exam Questions

31. 

In reinforced concrete, pedestal is defined as compression member, whose effective length does not exceed its least dimension by

A. 12 times
B. 3 times
C. 16 times
D. 8 times

Answer: Option B

Explanation:

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32. 

Flexible pavements derive stability primarily from :

A. aggregate interlock, particle friction and cohesion
B. cohesion alone
C. the binding power of bituminous materials
D. the flexural strength of the surface course

Answer: Option A

Explanation:

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33. 

The permissible bending tensile stress in concrete for the vertical wall of an R.C. water tank made of M 25 concrete is :

A. 8.5 N/mm2
B. 6.0 N/mm3
C. 2.5 N/mm2
D. 1.8 N/mm2

Answer: Option D

Explanation:

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34. 

The cylinder strength of the concrete is less than the cube strength because of

A. the difference in the shape of the cross section of the specimens
B. the difference in the slendeness ratio of the specimens
C. the friction between the concrete specimens and the steel plate of the testing machine
D. the cubes are tested without capping but the cylinders are tested with capping

Answer: Option B

Explanation:

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35. 

A water treatment plant is required to process 28800 m3/d of raw water (density = 1000 kg/m3, kinematic viscosity = 10-6 m2/s). The rapid mixing tank imparts tank a velocity gradient of 900s-1 to blend 35 mg/l of alum with the flow for a detention time of 2 minutes. The power input (W) required for rapid mixing is

A. 32.4
B. 36
C. 324
D. 32400

Answer: Option D

Explanation:

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