The characteristic strength of concrete is defined as that compressive strength

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Question
The characteristic strength of concrete is defined as that compressive strength below which not more than
Options
A. 10% of results fall
B. 5% of results fall
C. 2% of results fall
D. None of the above.

Correct Answer

5% of results fall

GATE Exam Questions problems

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1. 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
Options
A. 32.4
B. 36
C. 324
D. 32400

2. The modulus of subgrade reaction is obtained from the plate bearing test in the form of load-deformation curve. The pressure corresponding to the following settlement value should be used for computing modulus of subgrade reaction
Options
A. 0.375 cm
B. 0.175 cm
C. 0.125 cm
D. 0.250 cm

3. Shear stress develops on a fluid element, if :
Options
A. the fluid is at least
B. the fluid-container is subject to uniform linear acceleration
C. the fluid is inviscid
D. the fluid is viscous and the flow is nonuniform

7. 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
Options
A. 250 m
B. 360 m
C. 36 m
D. 300 m

9. The microbial quality of treated piped water supplies is monitored by
Options
A. Microscopic examination
B. Plate count of heterotrophic bacteria
C. Coliform MPN test
D. Identification of all pathogens

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