Exam (elaborations)
Irrigation Hydraulics: Questions & Complete Answers
- Course
- Institution
Irrigation Hydraulics: Questions & Complete Answers
[Show more]
Seller
Follow
LeCrae
Reviews received
Content preview
Irrigation Hydraulics: Questions & Complete AnswersHydraulics Right Ans - The study of fluids while in motion or at rest
Hydraulics Principles Right Ans - 1. Unlike air, water is not compressible.
2. Water is subject to gravity and will seek its own lowest level.
3. Water weighs 8.3 pounds per gallon
4. A cubic foot of water weighs 64.2 pounds
5. Water exerts pressure ( or force)
How much does water weight? Right Ans - 8.3 pounds per gallon
How much does a cubic foot of water weight? Right Ans - 62.4 pounds.
How is water force created? Right Ans - Is a result of its weight above the
point of measure, the higher the column of water the greater the pressure.
How much does a cubic inch of water weight? Right Ans - 62.4 lbs ( cubic ft
weight) / 1728 cubic inches ( 12"x12"12"= 1728) = .0361 pounds per cubic
inch
How to determine PSI in a column of water 1' ft high? Right Ans -
Multiply .0361 (1 cubic inch of water weight) x 12"( 1' ft ) = .433 PSI
How much pressure is there per vertical ft of water? Right Ans - .433 PSI
Water Pressure Formula Right Ans - P (pressure) = F (force)/ A(area in
square inches)
P= Pressure
F= Force in pounds
A= area in square inches
Note: .0361 pounds per cubic inch.
How to get water pressure in pounds per square inch? Right Ans - Every ft
in h eight of water (foot of head) x .433 = water pressure in pounds per square
inch.
, What does PSI stand for? Right Ans - Pressure per square inch
What's the PSI ( Pressure per square inch) formula Right Ans - Foot of head
x .433 = PSI
Example: 100 ft of head x .433 = 43.4 PSI ( Pressure per square inch)
How to find the elevation or ft of head from only having the PSI? Right Ans
- Divide given PSI by .433( pounds per cubic foot)
Example: 43.3 psi / .433 = 100 ft of head
How many feet of hear are there for every 1 PSI ( Pressure per square inch) ?
Right Ans - 2.31 feet of head.
Static Pressure Right Ans - Pressure at rest, stays the same unless affected
by elevation.
Feet of head Right Ans - Relationship between elevation and pressure.
* Every ft of height in water (ft of head) multiplied by .433 gives us the water
pressure in pounds per square inch.*
Static Water Right Ans - Water at rest and that is not moving.
How is static pressured achieved? Right Ans - By elevation in the water or
by a mechanical means such as a pump.
What does a gain in elevation result of ? Right Ans - Loss of pressure.
What does a loss in elevation result of ? Right Ans - Gain of pressure.
POC (Point of connection) Right Ans - Area where irrigation contractor can
tap into the service line ( anywhere between meter and the house. Also the
starting point of the main line for the irrigation system after backflow device
installation.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through EFT, credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller LeCrae. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for R189,03. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
73243 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy summaries for 14 years now