Principles Flashcards
1
Q
1st principle of friction loss
A
‘Doubling the length of hose, doubles the friction loss.’
2
Q
2nd principle of friction loss
A
‘If flow rate is doubled the friction loss will be four times greater’
FL varies with the square of the increase.
Double flow=4 times original FL
Triple flow=9 times original FL
3
Q
3rd principle of friction loss
A
FL in a hose will decrease when the diameter of the hose is increased
4
Q
4th principle of friction loss
A
Velocity of water through a hose line, not pressure, causes FL.
FL is velocity based, meaning the faster you move water, the more FL that occurs.
