Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
13 Cards in this Set
- Front
- Back
|
List the friction loss per 30m length of hose for different hose size |
38mm - 150kPa 50mm - 75 kPa 65mm - 25 kPa 90mm - 5 kPa |
|
|
What is the maximum height water can be lifted? (Theoretically and practically) |
Theoretically - 10m Practically - 7.5m |
|
|
What is the atmospheric air pressure (kPa)? |
100kPa |
|
|
For every meter of head, what is the water pressure (kPa)? |
10kPa |
|
|
How many kPa is equal to 1 BAR? |
100kPa |
|
|
What does DRISL stand for? (Friction loss laws) |
D- Diameter of hose R- Roughness of hose I- Independent of pressure S- Square of the flow rate L- Length of hose |
|
|
Explain the D in DRISL? |
Friction loss increases directly with the decrease in Diameter. Smaller diameter hose = more friction loss |
|
|
Explain the R in DRISL |
Friction loss increases with the Roughness of the interior of the hose |
|
|
Explain the I in DRISL |
Friction Loss is Independent of pressure |
|
|
Explain the S in DRISL |
Friction loss increases directly as the Square of the flow rate. By halving the flow rate by twinning the lines you reduce friction loss to 1/4 while maintaining the same volume of water |
|
|
Explain the L in DRISL |
Friction loss increases directly with the Length of the hose. If hose length is doubled, friction loss is doubled. |
|
|
What is the water capacity of a rectangle (L)? |
Length x width x height x 1000 |
|
|
How do you calculate the water capacity a flowing source like a river or creek (L/min)? |
Depth x width x rate of flow |
