An open tank 1.82m square, weighs 3,425 N and contains 0.91 m of water. It is acted upon by an unbalanced force of 10,400 N parallel to a pair of sides. What must be the height in m of the sides. What must be the height in m of the sides of the tank so that no water will be spilled?
Solution:
Weber Number is defined as:
a) The ratio of inertia forces to surface tension
b) The ratio of inertia forces to the pressure forces
c) The ratio of inertia forces to the elastic forces
d) The ratio of inertia forces to the gravity forces
Answer:
Determine the discharge over a triangular weir with angle = 73.74 deg. And H = 1.2m and Cw = 0.70.
Solution:
It is the increased pressure developed on impact with a pilot tube as a result of localized kinetic energy reduction to zero.
a) Oritical Pressure
b) Stagnation Pressure
c) Hydrodynamics
d) Pressure Relief
Answer:
The water supply for city is pumped to a distribution reservoir. The pumping rate is 600 cu.m. per 4 hours. The estimated water requirements every 4 hours. The estimated water requirements every 4 hours is shown below.
HOUR DEMAND
0400 200
0800 800
1200 1100
1600 700
2000 500
2400 300
What is the maximum requirement from the reservoir?
Solution:
A rectangular channel has a base width of 7.0m. and a depth of 2.5m. carries a discharged of 21.81 m3/s. It is required to change this channel into a most efficient trapezoidal section having the same material. Determine the increase in discharge of the new section.
Solution:
The maximum quantity of water which can be guaranteed during a critical dry period.
a) Reservoir reliability
b) Secondary yield
c) Safe yield
d) reservoir yield
Answer:
The removal of course and settle able solids by interception.
a) Screening
b) Comminution
c) Flocculation
d) Floatation
Answer:
A vertical jet of water supports a load of 200 N at a constant vertical height of 12m. from the tip of the nozzle. The diameter of the jet is 25mm Ø. Find the velocity of the jet nozzle tip:
Solution:
Evaporation of water from the leaves of plants is called.
a) Eutrophication
b) Saturation
c) Transpiration
d) Interception
Answer:
The science that treats of the water on earth, their occurrence, circulation and distribution, their chemical and physical properties and their reaction with their environment including their relation to living things:
a) Hydrology
b) Hydrograph
c) Kinetics
d) Unography
Answer:
Pipes 1, 2 and 3 are 300m., 150 and 250m. long and lf 25cm., 12cm. and 20cm. diam. With f1, f2 and f3 equal to 0.019, 0.019, 0.021 and 0.02 respectively and are connected in series. If the difference in elevation of the ends of the pipe is 10m., what is the rate of flow in cu.m./sec.
Solution:
A submarine, which maybe supposed to approximate a cylinder 3m Ø and 15m long travels submerged at 1.55 m/s at sea water at 5°C. Viscosity is 1.519x 10-6 m2/s. Find the Reynolds Number for this condition:
Solution:
What spillway of a dam is used when a space is limited:
a) shaft spillway
b) siphon spillway
c) side channel spillway
d) none of these
Answer:
The water supply for city is pumped to a distribution reservoir. The pumping rate is 600 cu.m. per 4 hours. The estimated water requirements every 4 hours. The estimated water requirements every 4 hours is shown below.
HOUR DEMAND
0400 200
0800 800
1200 1100
1600 700
2000 500
2400 300
What is the required reservoir capacity?
Solution:
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