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a) Choose the correct answer: i. The term gP is known as: [17] potential energy pressure head pressure energy none of the above ii. If viscosity is , density is ,men medocity is V and charncteristic length is L; Reynolds number is given by: VL LV LV OpVL iii. The velocity distribution for fully dexeloped laminar flow through a circular pipes is constant across the cross section varies linearly from zero at walls to maximum at the center varies parabolically with maximum at the conter equal to zero at the center iv. The hydraulic grade line s: always above the center line of pipe never above the energy gradient line always sloping down in the direction of flow all of the above v. For a piping system involving two pipes of different diameters (but of ider length, material, and roughness) connected in series: the head loss is same through each pipe the discharge is same through each pipe The discharge through each pipe is added to obtain the total