Water is released from a 0.8-m-deep reservoir into a 4-m-wide open channel through a sluice gate with a 0.1-m-high opening at the channel bottom. The flow depth after all turbulence subsides is 0.5 m. The rate of discharge is $(a) 0.92 m^3/s\ (b) 0.79 m^3/s\ (c) 0.66 m^3/s\ (d) 0.47 m^3/s\ (e) 0.34 m^3/s$

After heavy rain, water flows on a concrete surface at an average velocity of 1.3 m/s. If the water depth is 2 cm, determine whether the flow is subcritical or supercritical.

Water is to be transported in a 4-m-wide rectangular open channel. The flow depth to maximize the flow rate is (a) 1 m(b) 2 m(c) 4 m(d) 6 m(e) 8 m

Water flows in a 10-m-wide open channel with a flowrate of $5 \mathrm{m}^{3} / \mathrm{s}$. Determine the two possible depths if the specific energy of the flow is E = 0.6 m.

The speed of a spacecraft is given to be 1250 km/h in atmospheric air at $240^\circ C$. The Mach number of this flow is (a) 35.9 (b) 0.85 (c) 1.0 (d) 1.13 (e) 2.74

Consider water flow in a rectangular open channel of height 2 m and width 5 m containing water of depth 1.5 m. The hydraulic radius for this flow is (a) 0.47 m(b) 0.94 m(c) 1.5 m(d) 3.8 m(e) 5 m

Water discharges into a rectangular horizontal channel from a sluice gate and undergoes a hydraulic jump. The flow depth and velocity before the jump are 1.25 m and 6 m/s, respectively. The percentage available head loss due to the hydraulic jump is (a) 4.7%(b) 6.2%(c) 8.5%(d) 13.9%(e) 17.4%

If mass, heat, and work are not allowed to cross the boundaries of a system, the system is called(a) Isolated(b) Isothermal(c) Adiabatic(d) Control mass(e) Control volume

Water is to be transported in a finished-concrete rectangular channel with a bottom width of 1.2 m at a rate of $5 m^3/s$. The channel bottom drops 1 m per 500 m length. The minimum height of the channel under uniform-flow conditions is (a) 1.9 m (b) 1.5 m (c) 1.2 m (d) 0.92 m(e) 0.60 m

Water discharges into a rectangular horizontal channel from a sluice gate and undergoes a hydraulic jump. The channel is 25-m-wide and the flow depth and velocity before the jump are 2 m and 9 m/s, respectively. The flow depth after the jump is (a) 1.26 m(b) 2 m(c) 3.61 m(d) 4.83 m(e) 6.55 m

A 1.8-m-diameter and 3.6-m-long cylindrical container contains a fluid with a specific gravity of 0.73. The container is positioned vertically and is full of the fluid. Disregarding atmospheric pressure, the hydrostatic force acting on the top and bottom surfaces of this container, respectively, are (a) 0 kN, 65.6 kN(b) 65.6 kN, 0 kN(c) 65.6 kN, 65.6 kN(d) 25.5 kN, 0 kN(e) 0 kN, 25.5 kN

Water at $10^{\circ} \mathrm{C}$ flows in a 6-m-wide rectangular channel at a depth of 0.55 m and a flow rate of 12 $m^3/s$. Determine (a) the critical depth, (b) whether the flow is subcritical or supercritical, and (c) the alternate depth.

Which choices are examples of open-channel flow? I. Flow of water in riversII. Draining of rainwater off highwaysIII. Upward draft of rain and snowIV. Sewer lines (a) I and II(b) I and III(c) II and III(d) I, II, and IV(e) I, II, III, and IV

Water flows in a rectangular open channel of width 0.6 m at a rate of $0.25 m^3/s$. If the flow depth is 0.2 m, what is the alternate flow depth if the character of flow were to change? (a) 0.2 m(b) 0.26 m(c) 0.35 m(d) 0.6 m(e) 0.8 m