6 Questions with Solution of Hydraulics - Final Exam | CE 34000, Exams of Civil Engineering

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CE 340 FINAL EXAM SPRING 2001 The numbers in brackets after each question refer to the points carried by the question. Answer all questions, 1. Are the following statements true (T) or false(F)? (10 points) « a, When no pumps are present, it is impossible for the hydraulic grade line to increase in direction of fiow. When flowing full, the hydraulic radius of a circular pipe is one half of the pipe radius. <,. l K ¢. For laminar flow in a pipe, head loss due to friction increases linearly with velocity. A 4 d. For uniform flow in a rectangular channel, the slope of the energy grade line is equal to the slope of the channel bottom. { X e. The rougher the bottom and side surfaces of an open channel, the smaller the Manning’s n value will be, « f. In open channels, critical flow occurs when discharge is a minimum, A & 8. In open chanmels, the water surface is the energy grade line only for uniform flows. h. In static fluids, pressure always increases in the vertically downwards direction. {i The HGL and the EGL differ only by the velocity head. « J. Ina uniform flow field, the streak lines and stream lines are coincident irrespective of where they originate.