Homework Answers
vii) a) it will be larger in upper reservoir
since the height of water in a upper reservoir is 25 m which greater than that of lower reservoir.
higher the depth , higher will be the absolute pressure , since absolute pressure = density of water x acceleration due to gravity x height of water
viii) c) pressure head of flow decreases is the wrong answer. unless there is increase in pressure head, flow cannot occur over the uphill
ix) a) greater than the atmoshperic pressure... flow only occurs if and only if, pressure is greater than the atmospheric pressure
x) relative density = weight of object in air / weight of water that displaced
weight of object in air = m g = 10 x 10 = 100 N
weight of water that displaced = volume displaced x unit weight of water
= 0.1 x 10x 103
= 1000 N
relative density = 100 N / 1000 N = 0.1
option a) 0.1
Add Answer to:
(Q1 contd) (vii) A pumped storage hydroelectric scheme comprises two reservoirs. The water surface of the...
Water is pumped from reservoir A to B. The water-surface elevations in the reservoirs A and...
Water is pumped from reservoir A to B. The water-surface elevations in the reservoirs A and B WCalier enange is 4.1 kPa. 7.11 and 318 m, respectively. The suction line is 9.5 cm, which is short enough that the are 300 m head losses may be neglected. The pressure pipe is 400 m long and 79 cm in diameter. There are three 90° and two 45° bends. Calculate the annual power bill for pumping 0.30 m?/s. Unit power cost is...
In a hydroelectric power station, the turbine is driven by water flowing from a reservoir at...
In a hydroelectric power station, the turbine is driven by water flowing from a reservoir at the rate of 551 m s. The water is pumped through a pipe 2.06 km long of 2.53 m intemal diameter with a friction factor of 0.004. The water is assumed to have a kinematic viscosity of 13x10 mʻls. The elevation of the upper reservoir above sea level is 400 m and that of the lower reservoir is 40 m. Determine the following Mean...
A pumped-storage hydroelectric plant generates high value electricity during peak demand times, b...
A pumped-storage hydroelectric plant generates high value electricity during peak demand times, by allowing water (density 1,000 kg/m3) to run through a pipe from an elevated reservoir through a bank of turbines and then into a lower level reservoir. It then uses low-cost, off-peak electricity to pump the water back up into the upper reservoir The water surface in the very large upper reservoir (A) is 600 m above datum whilst that in the very large lower reservoir (B) is...
Two reservoirs whose difference of level is 15 m are connected by a pipe ABC whose highest point ...
Two reservoirs whose difference of level is 15 m are connected by a pipe ABC whose highest point B is 2 m below the level in the upper reservoir A. The portion AB has a diameter of 200 mm and the portion BC a diameter of 150 mm, the friction coefficient being the same for both portions. The total length of the pipe is 3 km. Find the maximum allowable length of the portion AB if the pressure head at...
Q2. 50 marks Water at 20°C is pumped at 5.7 m3 min-1 from the lower to...
Q2. 50 marks Water at 20°C is pumped at 5.7 m3 min-1 from the lower to the upper reservoir, as in Fig. 2. The free surface of the upper reservoir is at height Z2 = 46 m, and of the lower reservoir at 21 = 15 m. The pipe diameter before and after the pump is D= 15 cm. Pipe friction losses are approximated by h = 27v2/(29), where V is the average velocity in the pipe. The gravitational acceleration...
Question 23 Glycerine at 30°C is flowing between two large reservoirs. These reservoirs have differences in...
Question 23 Glycerine at 30°C is flowing between two large reservoirs. These reservoirs have differences in the level of 10 m and connected through a plastic pipe. This pipe is 75 m long and goes up to a height of 3 m above the upper reservoir for a distance of 25 m where its diameter is 50 cm from the sharp-edged' entrance. The average velocity of glycerine along this distance is 62.79 m/s. After 5 m declining from the highest...
Question a. Two reservoirs are connected together by a pipeline which is 200 mm in diameter...
Question a. Two reservoirs are connected together by a pipeline which is 200 mm in diameter and 2000 m long for which the friction factor f, is constant and equal to 0.0045. The head difference between the reservoirs is 25 m and remains constant. Under these conditions, determine the flow in the pipeline. Minor losses can be ignored, however the rejected kinetic energy should be taken into account. b. In this case, is the rejected kinetic energy worth taking into...
NO QUESTIONS DURING T Water is to be pumped from a reservoir (ZA30 /s- to another reservoir at a higher elevati rate...
NO QUESTIONS DURING T Water is to be pumped from a reservoir (ZA30 /s- to another reservoir at a higher elevati rate of elevation (Zn THE EXAM! n) through a long pipe, as shown in the figure at a volume ow olume flow rate has been calculated and is 11 m he head loss in the pipe at this usefuf pump ) Demostrate that wh en a pump moves a fluid from one reservoir to ano e elevation difference between...
Water (density 998 kg/mº, dynamic viscosity 0.001 Pa s) is pumped between two reservoirs at a...
Water (density 998 kg/mº, dynamic viscosity 0.001 Pa s) is pumped between two reservoirs at a volumetric flow rate of 0.006 m/s through a 120-m long pipe of 5 cm diameter. The roughness ratio of the pipe is a/d = 0.001. There are some fittings and valves in the pipe system, as shown in Figure Q1. The loss coefficients of the valves and fittings can be found in Table Q1. The Darcy friction factor can be found in the Moody...
Two reservoirs, the water levels in which are at elevations 180 m and 150 m respectively,...
Two reservoirs, the water levels in which are at elevations 180 m and 150 m respectively, are connected by a pipe 3000 m long, 600 mm diameter and friction factor 0.025. The elevation of the ground along the line of the pipeline is given in the table below. Distance (m) o Elevation (m) 17!5 150 165 300 190 1800 140 3000 147 Assuming a rounded inlet and an abrupt outlet calculate the quantity of flow. Find the maximum depth of...
Water is pumped from reservoir A to B. The water-surface elevations in the reservoirs A and B WCalier enange is 4.1 kPa. 7.11 and 318 m, respectively. The suction line is 9.5 cm, which is short enough that the are 300 m head losses may be neglected. The pressure pipe is 400 m long and 79 cm in diameter. There are three 90° and two 45° bends. Calculate the annual power bill for pumping 0.30 m?/s. Unit power cost is...
In a hydroelectric power station, the turbine is driven by water flowing from a reservoir at the rate of 551 m s. The water is pumped through a pipe 2.06 km long of 2.53 m intemal diameter with a friction factor of 0.004. The water is assumed to have a kinematic viscosity of 13x10 mʻls. The elevation of the upper reservoir above sea level is 400 m and that of the lower reservoir is 40 m. Determine the following Mean...
A pumped-storage hydroelectric plant generates high value electricity during peak demand times, by allowing water (density 1,000 kg/m3) to run through a pipe from an elevated reservoir through a bank of turbines and then into a lower level reservoir. It then uses low-cost, off-peak electricity to pump the water back up into the upper reservoir The water surface in the very large upper reservoir (A) is 600 m above datum whilst that in the very large lower reservoir (B) is...
Q2. 50 marks Water at 20°C is pumped at 5.7 m3 min-1 from the lower to the upper reservoir, as in Fig. 2. The free surface of the upper reservoir is at height Z2 = 46 m, and of the lower reservoir at 21 = 15 m. The pipe diameter before and after the pump is D= 15 cm. Pipe friction losses are approximated by h = 27v2/(29), where V is the average velocity in the pipe. The gravitational acceleration...
Question 23 Glycerine at 30°C is flowing between two large reservoirs. These reservoirs have differences in the level of 10 m and connected through a plastic pipe. This pipe is 75 m long and goes up to a height of 3 m above the upper reservoir for a distance of 25 m where its diameter is 50 cm from the sharp-edged' entrance. The average velocity of glycerine along this distance is 62.79 m/s. After 5 m declining from the highest...
Question a. Two reservoirs are connected together by a pipeline which is 200 mm in diameter and 2000 m long for which the friction factor f, is constant and equal to 0.0045. The head difference between the reservoirs is 25 m and remains constant. Under these conditions, determine the flow in the pipeline. Minor losses can be ignored, however the rejected kinetic energy should be taken into account. b. In this case, is the rejected kinetic energy worth taking into...
NO QUESTIONS DURING T Water is to be pumped from a reservoir (ZA30 /s- to another reservoir at a higher elevati rate of elevation (Zn THE EXAM! n) through a long pipe, as shown in the figure at a volume ow olume flow rate has been calculated and is 11 m he head loss in the pipe at this usefuf pump ) Demostrate that wh en a pump moves a fluid from one reservoir to ano e elevation difference between...
Water (density 998 kg/mº, dynamic viscosity 0.001 Pa s) is pumped between two reservoirs at a volumetric flow rate of 0.006 m/s through a 120-m long pipe of 5 cm diameter. The roughness ratio of the pipe is a/d = 0.001. There are some fittings and valves in the pipe system, as shown in Figure Q1. The loss coefficients of the valves and fittings can be found in Table Q1. The Darcy friction factor can be found in the Moody...
Two reservoirs, the water levels in which are at elevations 180 m and 150 m respectively, are connected by a pipe 3000 m long, 600 mm diameter and friction factor 0.025. The elevation of the ground along the line of the pipeline is given in the table below. Distance (m) o Elevation (m) 17!5 150 165 300 190 1800 140 3000 147 Assuming a rounded inlet and an abrupt outlet calculate the quantity of flow. Find the maximum depth of...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago