CIVL 212 3. Hudson Valley Community College Exam #2 You need to deliver water from a reservoir to a community that is 20 miles away. The community requires 75000 gallons of water per hour. The water temperature is 50 °F. You decide to install an 8" diameter Schedule 80 steel pipe to service this community. You also decide to install a booster pump every two miles along the pipeline to maintain the flow. Find the velocity of the flow in feet/second, the amount of energy lost to friction for every 2 miles between the pumping stations and finally, discuss what needs to happen at each pumping station in order to replace the amount of energy lost to friction. What is the minimum pressure drop the pump must overcome? Multiple pumps (redundant) are often used at pumping stations. Please list some reasons why this is done. For another 5 points, if a pump is 87% efficient, what is the minimum power input for a single pump every two miles to handle the load? In real life, this would be the Points) size of the pump and then we would add more pumps for the reasons you stated above. (40 JUFD 2 miles Denotes a pumping station (typical) 2 miles 8 inch Schedule 80 Steel Pipe Flo CIVL 212 Hudson Valley Community College Exam #2 2. You are asked to drain another water bed identical to the set up in Problem 1 but you no longer have a frictionless hose and have to use a regular garden hose like the rest of us. Please calculate (in feet) the total losses in the drain hose. As you always keep a flow meter on you for just such problems, you measure that the velocity of the water out of the hose is 21.5 ft/s for the hose with friction included. To get full credit, please state the volume flow rate in gal/min, the time to drain and the Reynolds number. Is the flow laminar or turbulent? Compare the flow rate from Problem 1. Is this flow rate less, more or the same? State in a few words why the current flow rate makes sense compared to the ideal conditions from Problem 1. (30 Points) For an extra 5 points, what is the friction factor f if the hose roughness is 3.22x10-5 ft?
CIVL 212 3. Hudson Valley Community College Exam #2 You need to deliver water from a reservoir to a community that is 20 miles away. The community requires 75000 gallons of water per hour. The water temperature is 50 °F. You decide to install an 8" diameter Schedule 80 steel pipe to service this community. You also decide to install a booster pump every two miles along the pipeline to maintain the flow. Find the velocity of the flow in feet/second, the amount of energy lost to friction for every 2 miles between the pumping stations and finally, discuss what needs to happen at each pumping station in order to replace the amount of energy lost to friction. What is the minimum pressure drop the pump must overcome? Multiple pumps (redundant) are often used at pumping stations. Please list some reasons why this is done. For another 5 points, if a pump is 87% efficient, what is the minimum power input for a single pump every two miles to handle the load? In real life, this would be the Points) size of the pump and then we would add more pumps for the reasons you stated above. (40 JUFD 2 miles Denotes a pumping station (typical) 2 miles 8 inch Schedule 80 Steel Pipe Flo CIVL 212 Hudson Valley Community College Exam #2 2. You are asked to drain another water bed identical to the set up in Problem 1 but you no longer have a frictionless hose and have to use a regular garden hose like the rest of us. Please calculate (in feet) the total losses in the drain hose. As you always keep a flow meter on you for just such problems, you measure that the velocity of the water out of the hose is 21.5 ft/s for the hose with friction included. To get full credit, please state the volume flow rate in gal/min, the time to drain and the Reynolds number. Is the flow laminar or turbulent? Compare the flow rate from Problem 1. Is this flow rate less, more or the same? State in a few words why the current flow rate makes sense compared to the ideal conditions from Problem 1. (30 Points) For an extra 5 points, what is the friction factor f if the hose roughness is 3.22x10-5 ft?
Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter15: Fluid Mechanics
Section: Chapter Questions
Problem 69P
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Transcribed Image Text:CIVL 212
3.
Hudson Valley Community College
Exam #2
You need to deliver water from a reservoir to a community that is 20 miles away. The community
requires 75000 gallons of water per hour. The water temperature is 50 °F. You decide to install an
8" diameter Schedule 80 steel pipe to service this community. You also decide to install a booster
pump every two miles along the pipeline to maintain the flow. Find the velocity of the flow in
feet/second, the amount of energy lost to friction for every 2 miles between the pumping
stations and finally, discuss what needs to happen at each pumping station in order to replace
the amount of energy lost to friction. What is the minimum pressure drop the pump must
overcome? Multiple pumps (redundant) are often used at pumping stations. Please list some
reasons why this is done. For another 5 points, if a pump is 87% efficient, what is the minimum
power input for a single pump every two miles to handle the load? In real life, this would be the
Points)
size of the pump and then we would add more pumps for the reasons you stated above. (40
JUFD
2 miles
Denotes a pumping station
(typical)
2 miles
8 inch Schedule 80 Steel Pipe
Flo
Transcribed Image Text:CIVL 212
Hudson Valley Community College
Exam #2
2. You are asked to drain another water bed identical to the set up in Problem 1 but you no longer
have a frictionless hose and have to use a regular garden hose like the rest of us. Please calculate
(in feet) the total losses in the drain hose. As you always keep a flow meter on you for just such
problems, you measure that the velocity of the water out of the hose is 21.5 ft/s for the hose
with friction included. To get full credit, please state the volume flow rate in gal/min, the time to
drain and the Reynolds number. Is the flow laminar or turbulent? Compare the flow rate from
Problem 1. Is this flow rate less, more or the same? State in a few words why the current flow
rate makes sense compared to the ideal conditions from Problem 1. (30 Points) For an extra 5
points, what is the friction factor f if the hose roughness is 3.22x10-5 ft?
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