Water flows in a rectangular culvert 6.0-ft wide and 4.0-ft high. The water depth is 3.5 ft and the velocity is 8.0 ft/s. Find: The minimum headloss in 500 feet of concrete culvert. [Hints: assume fully turbulent flow; the concrete roughness is smooth for pre-cast concrete; and, note that this pipe is a rectangular conduit designed not to flow full.]

Ariver flows from north to south at 8 km/h. a boat is to cross this river from west to east at a speed of 20 km/h (speed of the boat with respect to the earth/ground). at what angle (in degrees) must the boat be pointed upstream such that it will proceed directly across the river (hint: find the speed of the boat with respect to water/river)? a 288 b. 21.8 c. 326 d. 30.2

Vibration monitoring this technique uses the noise or vibration created by mechanical equipment and in seme cases by plant systems to detemine their actual condtion. a)- true b)- false

Aquick transition of the operating speed of a shaft from its critical speed will whirl amplitude. (a) increase (b) limit (c) not affect (d) zero