ENGINEERING FUNDAMENTALS
6th Edition
ISBN: 9781337705011
Author: MOAVENI
Publisher: CENGAGE L
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Chapter 8, Problem 56P
To determine
Show that 355 billion gallons of water consumed per day is equal to 397,000 acre-feet per year.
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An issue of a magazine contained the following statement.
Dropping less than two inches per mile after emerging from the mountains, a river drains into the ocean. One day's discharge at its mouth,
3
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five
months.
Based on this statement, determine how much water an average household uses each month. Assume that there are
100
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Lake Mead near Hoover Dam in Nevada is the largest manmade lake in the U.S. It contains 28,537,000 acre-ft of water when filled to capacity. (An acre-ft is the amount of water that covers 1 acre to a depth of 1 ft). Express Lake Mead's water volume in gallons and m3.
Thirty (30) liters/second of stream water must be pumped up a vertical height of 12 meters to irrigate a farm. If head loss in casing and pump results in 62% pump efficiency and the electric motor used has 91% efficiency, what horsepower rating should the motor have and how many kilowatts will it use while pumping?
GIVEN:
q=30 l/s 0r 108 cu.m/hr
h=12 m
ME=91%
PE=62%
density of water =997 kg/cu.m
Chapter 8 Solutions
ENGINEERING FUNDAMENTALS
Ch. 8.2 - Prob. 1BYGCh. 8.2 - Prob. 2BYGCh. 8.2 - Prob. 3BYGCh. 8.2 - Prob. 4BYGCh. 8.2 - Prob. BYGVCh. 8.4 - Prob. 1BYGCh. 8.4 - Prob. 2BYGCh. 8.4 - Prob. 3BYGCh. 8.4 - Prob. BYGVCh. 8.5 - Prob. 1BYG
Ch. 8.5 - Prob. 2BYGCh. 8.5 - Prob. 3BYGCh. 8.5 - Prob. 4BYGCh. 8.5 - Prob. BYGVCh. 8 - Prob. 1PCh. 8 - Prob. 3PCh. 8 - Prob. 4PCh. 8 - Prob. 9PCh. 8 - Prob. 10PCh. 8 - Prob. 11PCh. 8 - Prob. 12PCh. 8 - Prob. 13PCh. 8 - Prob. 14PCh. 8 - Prob. 15PCh. 8 - Prob. 17PCh. 8 - Prob. 18PCh. 8 - Prob. 19PCh. 8 - Prob. 20PCh. 8 - Prob. 21PCh. 8 - Prob. 22PCh. 8 - Prob. 23PCh. 8 - Prob. 24PCh. 8 - Prob. 25PCh. 8 - Prob. 26PCh. 8 - Prob. 27PCh. 8 - Prob. 28PCh. 8 - Prob. 29PCh. 8 - Prob. 30PCh. 8 - Prob. 31PCh. 8 - Prob. 32PCh. 8 - Prob. 33PCh. 8 - Prob. 34PCh. 8 - Prob. 35PCh. 8 - Prob. 36PCh. 8 - Prob. 37PCh. 8 - Prob. 38PCh. 8 - Prob. 39PCh. 8 - Prob. 40PCh. 8 - Prob. 41PCh. 8 - Prob. 42PCh. 8 - Prob. 43PCh. 8 - Prob. 44PCh. 8 - Prob. 45PCh. 8 - Prob. 46PCh. 8 - Prob. 47PCh. 8 - Prob. 48PCh. 8 - Prob. 49PCh. 8 - Prob. 50PCh. 8 - Prob. 51PCh. 8 - Prob. 52PCh. 8 - Prob. 53PCh. 8 - Prob. 54PCh. 8 - Prob. 55PCh. 8 - Prob. 56PCh. 8 - Prob. 57PCh. 8 - Prob. 58PCh. 8 - Prob. 59P
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- The total water supply of the world is about 326 million cubic miles. Express this supply in: 1. Ca ft. 2. Gallons 3. Cubic meters 4. Acre-ft 5. Cubic kilometers 6. Kilimetersmeters 7. Liters 8. Tonsarrow_forwardA system of three pipes 600 m, 800 m, and 1000 m long that are connected in series carries 600 L/sec of water. If the three pipes are 450 mm, 340 mm, and 400 mm in diameter respectively, what is the diameter of a single pipe that can replace the system? Assume f =0.016 for all pipes.arrow_forwardinformation Convert the quantities into the corresponding Sl units 4.183E7 U.S. gallons per day. m/sarrow_forward
- The total water supply of the world is about 326 million cubic miles. Express this supply in: 1.Acre-ft 2. Cubic kilometers 3. Kilimetersmeters 4. Liters 5. Tonsarrow_forwardThe volume of water in large scale reservoirs is often measured in units of an acre-foot, which is the amount of water covering one acre of surface to a depth of one foot. An acre-foot is equivalent to 43,560 ft³. A particular water tower in town was constructed to hold 3.75 acre-feet of water. What is the volume of water in liters that the water tower will hold? ( 1 US liquid gallon = 231 cubic inches, 3.785 liters = 1 US liquid gallon)arrow_forwardWhat is the cost to pump 1000 liters of water to the top of a 30 m high water tank? Assume a pumping efficiency of 50% and an electrical cost of $0.15 per KW-h. P(h2O) = 1000 ?g/m^3 . 1 m^3 = 1000 litersarrow_forward
- Q3: Calculate the quantity of water in a reservoir in the following units: (a): : (b): m: (c): liter: (d): gallon. The acre-foot unit is used. The area of the reservoir is equivalent to the area of 3 acres, and it has a depth of 6 fl.arrow_forwardA sylo can contain 3.75*10^4 lb of liquid. The volume of water it would take is 552.885 ft3 if the weight of liquid contained by the sylo is 1,575,000 lb, what is the weight density of the fluid?arrow_forwardOf the earth’s total volumetric supply of water, approximately how much is fresh water and how much is underground water?arrow_forward
- calculate the volume of the water in ft3.arrow_forwardQUESTION 7 Calculate the flowrate of water passing through a pump in which the power is 22.1 kW, the change in head is 81.7 m and the efficiency is 79%. Please give your answer in l/s to 3 significant figures.arrow_forwardQuestion 2/10 The water supply for the city is pumped to a distribution reservoir. The pumping rate is 400 m3 per 4 hours. The estimated water requirements every 4 hours is shown below. What is the required reservoir capacity? 400 m3 Hour 0400 0800 1200 1600 2000 2400 700 m3 500 m3 600 m3 What is the maximum requirement from the reservoir? 600 m3 O 500 m3 300 m3 400 m3 200 m3 300 m3 At 0800 hours, the reservoir contains 600 cu. m, how much water is in the reservoir at 2000 hours? 150 m3 Demand 300 600 800 500 350 200 Jay 250 m3arrow_forward
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