CE142P Exercise No. 02

HYDRAULICS |2ND Qtr. AY 2016-2017 | ENGR. KEVIN PAOLO V. ROBLES

CE142P Exercise no. 02 (Homework)

Name : __________________________________ Section: ________

1.

A raised water tank has a leak at the bottom which causes the water surface to drop from elevation 4.88m to elevation 4.57 m in a period of 12 hours. (a) What will be the elevation of the water surface in the tank after 5 full days (starting from elevation 4.88m) if no water other than the leaking water is either added or drained from the tank? The bottom of the tank is at elevation zero. (b) How long will it take to empty the tank due to leakage? (c) How long will it take to lower the water in the tank by 1.2m

2.

A cylindrical water storage 12. in diameter and 8 m high, is filled through a 100 mm pipe carrying a velocity of 40 m/s. (a) How long will it take to fill the tank? (b) If the tank has an out flow pipe at the bottom with a capacity of 0.12 m 3/s discharge rate and both inflow and outflow pipes are opened at the same time, compute the time rate of the rise of the water level. (c) Compute the time needed to fill it with both pipes opened.

3.

A circular vessel 2m in diameter and 3 meters high as shown in the figure is filled with liquids A, B, and C, respectively. At the bottom of the vessel is a 0.09 m2 standard orifice, C = 0.60. (a) Find the time to remove liquid A out of the container. (Find the time to remove liquid A and B out of the container. (c) Find the total time to empty the container.

4.

The orifice in the side of a closed tank is 50 mm square with C = 0.60 and Cc = 0.62. An open mercury manometer indicates the pressure in the air at the top of the tank. (a) Compute the rate of discharge when the liquid in the tank is water. (b) Compute the rate of discharge when the upper 3m of liquid in the tank is oil having a specific gravity of 0.82 and the remainder is water. (c) Compute the rate of discharge when the liquid in the tank is oil (sp. Gr. = 0.82)

HYDRAULICS |2ND Qtr. AY 2016-2017 | ENGR. KEVIN PAOLO V. ROBLES

5.

(a) Determine the time required to raise the right hand surface of the figure by 0.90m. (b) Determine the volume of water that flows towards the right hand surface. (c) How long will the water level on both tanks be on the same level?