171. The units of viscosity are__________________? September 7, 2025 by Admin A. metres2 per sec B. kg sec/metre C. newton-sec per metre2 D. newton-sec per metre ✅ The correct answer is option B.
172. If is the rugosity coefficient, is the bed slope of sewer, the velocity of flow in m/sec may be obtained by the formula V = (1/n) r2/3 s1/2 evolved by_________________? September 7, 2025 by Admin A. Chezy B. Manning C. Bazin D. Kutter ✅ The correct answer is option B.
173. The coagulant widely used for sewage treatment, is_________________? September 7, 2025 by Admin A. Alum B. Ferric chloride C. Ferric sulphate D. Chlorinated copperas ✅ The correct answer is option B.
174. The flow velocity in detritus tanks is________________? September 7, 2025 by Admin A. 0.05 m/sec B. 0.09 m/sec C. 1.25 m/sec D. None of these ✅ The correct answer is option B.
175. 15 cumecs, the depth d and width are related by For drains up to___________________? September 7, 2025 by Admin A. d = 0.2 B B. d = 0.5 B C. B = 0.2 d D. B = 0.5 d ✅ The correct answer is option B.
176. The design period of sewage treatment works in normally_________________? September 7, 2025 by Admin A. 5 – 10 years B. 15 – 20 years C. 30 – 40 years D. 40 – 50 years ✅ The correct answer is option B.
177. What is another term for “acid-test ratio” ? September 7, 2025 by Admin A. Current ratio B. Quick ratio C. Profit margin ratio D. Price-earnings ratio ✅ The correct answer is option B.
178. What is a secondary book of accounts, the information of which is obtained from the journal is called ? September 7, 2025 by Admin A. Balanced sheet B. Ledger C. Worksheet D. Trial balance ✅ The correct answer is option B.
179. In sewage having fully oxidised organic matter, the nitrogen exists in the form of________________? September 7, 2025 by Admin A. Nitrites B. Nitrates C. Free ammonia D. Aluminoid nitrogen ✅ The correct answer is option B.
180. Metacentre is the point of intersection of _________________________? September 7, 2025 by Admin A. vertical upward force through e.g. of body and center line of body B. buoyant force and the center line of body C. mid point between e.g. and center of buoyancy D. all of the above ✅ The correct answer is option B.