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- Question
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
- Correct Answer
- 32400
- 1. 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 Discuss
- 2. 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 Discuss
- 3. The treatment that should be given to the water from a deep tube well is :
Options- A. pre-settling only
- B. coagulation and flocculation only
- C. filtration only
- D. disinfection only Discuss
- 4. The permissible bending tensile stress in concrete for the vertical wall of an R.C. water tank made of M 25 concrete is :
Options- A. 8.5 N/mm2
- B. 6.0 N/mm3
- C. 2.5 N/mm2
- D. 1.8 N/mm2 Discuss
- 5. Consolidation in soils
Options- A. is a function of the effective stress
- B. does not depend on the present stress
- C. is a function of the pore water pressure
- D. is a function of the total stress Discuss
- 6. 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. Discuss
- 7. In an iceberg, 15% of the volume projects above the sea surface. If the specific weight of sea water is 10.5 kN/m3 , the specific weight of iceberg ir kN/m3 is
Options- A. 12.52
- B. 9.81
- C. 8.93
- D. 7.83 Discuss
- 8. 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 Discuss
- 9. The depth of tension crack in a soft clay (?u = 0) is
Options- A.
- B.
- C.
- D.
Discuss
- 10. 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 Discuss
GATE Exam Questions problems
Search Results
Correct Answer: 0.125 cm
Correct Answer: the fluid is viscous and the flow is nonuniform
Correct Answer: disinfection only
Correct Answer: 1.8 N/mm2
Correct Answer: is a function of the pore water pressure
Correct Answer: 5% of results fall
Correct Answer: 8.93
Correct Answer: 360 m
Correct Answer:
Correct Answer: Coliform MPN test
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