391. 1000 kg of sewage contains________________? A. 0.112 kg in suspension B. 0.112 kg in solution C. 0.225 kg in solution D. Both A. and C. of above ✅ The correct answer is option D.
392. In detritus tanks______________________? A. Flow velocity is kept 0.09 m/sec B. Detention period is kept 3 to 4 minutes C. Organic and inorganic materials are separated D. All the above ✅ The correct answer is option D.
393. The settlement of a particle in sedimentation tank, is affected by_____________________? A. Velocity of flow B. Viscosity of water C. Size and shape of solid D. All the above ✅ The correct answer is option D.
394. The increase of temperature results in_________________? A. increase in viscosity of gas B. increase in viscosity of liquid C. decrease in viscosity of gas D. decrease in viscosity of liquid ✅ The correct answer is option D.
395. The financial health of the company is measured in terms of______________? A. Liquidity B. Solvency C. Relative risk D. All of the above ✅ The correct answer is option D.
396. In a forced vortex, the velocity of flow everywhere within the fluid is__________________? A. maximum B. minimum C. zero D. non-zero finite ✅ The correct answer is option D.
397. For large sewers, maximum distance between manholes may be_______________? A. 50 m B. 100 m C. 200 m D. 300 m ✅ The correct answer is option D.
398. No treatment of the sewage is given if dilution factor is_____________? A. Less than 150 B. Between 150 to 200 C. Between 200 to 300 D. More than 500 ✅ The correct answer is option D.
399. A nuisance is experienced in diluting water if dilution factor is less than_________________? A. 100 B. 60 C. 40 D. 20 ✅ The correct answer is option D.
400. For evaporation and measurement of settable solids, the apparatus used, is________________? A. A jar B. A breaker C. A test tube D. An Imhoff cone ✅ The correct answer is option D.