301. Rotameter is a device used to measure____________________? A. absolute pressure B. velocity of fluid C. flow D. rotation ✅ The correct answer is option C.
302. Bernoulli equation deals with the law of conservation of____________________? A. mass B. momentum C. energy D. work ✅ The correct answer is option C.
303. The property of a fluid which enables it to resist tensile stress is known as________________? A. compressibility B. surface tension C. cohesion D. adhesion ✅ The correct answer is option C.
304. If the over land flow from the critical point to the drain is 8 km and the difference in level is 12.4 m, the inlet time is________________? A. 2 hours B. 3 hours C. 4 hours D. 5 hours ✅ The correct answer is option C.
305. Pick up the in-correct statement from the following? A. Manholes are provided in sewer pipes at suitable intervals B. Catch basins are generally provided in sewers for carrying drainage discharge C. Inlets are generally provided in all sewers D. None of these ✅ The correct answer is option C.
306. The time oscillation of a floating body with increase in metacentric height will be________________? A. same B. higher C. lower D. lower/higher depending on weight of body ✅ The correct answer is option C.
307. Pick up the incorrect statement from the following for allowing workers to enter sewers_______________? A. The particular manhole and one manhole on upstream and one manhole on downstream should remain open for 30 minutes B. Proper tests for the presence of poisonous gases must be carried out C. The men entering the manhole should be advised to smoke in the sewer D. Warning signals should be erected ✅ The correct answer is option C.
308. Maximum permissible velocity 1.5 m/sec, is adopted in drains_______________________? A. With beds of rocks and gravels B. Lined with stones C. Both A. and B. D. Neither A. nor B. ✅ The correct answer is option C.
309. In an immersed body, center of pressure is ____________________? A. at the center of gravity B. above the center of gravity C. below be center of gravity D. could be above or below e.g. depending on density of body and liquid ✅ The correct answer is option C.
310. Mercury does not wet glass. This is due to property of liquid known as_________________? A. adhesion B. cohesion C. surface tension D. viscosity ✅ The correct answer is option C.