PP 004: Pressure Loss Calculations Flashcards
1
Q
What are the two main reasons for a reduction in pressure, in the hose?
A
Frictional loss
Effects of gravity when working above the pump
2
Q
The amount of pressure loss is influenced by what factors?
Four answers
A
Diameter of hose
Output flow of water
Length of hose
Height in metres above or below the water source
3
Q
What is the frictional loss in a 45mm hose?
A
1 BAR
4
Q
What is the frictional loss in a 70mm hose?
A
0.2 BAR
5
Q
What is the frictional loss for every metre above the pump?
A
0.1 BAR
Every 3 floors is 1 BAR
6
Q
What is the frictional loss for a hose reel?
A
8.5 BAR
