Hydraulics

Question 1

What is the weight of a cubic foot of water

Answer 1

62.5 pounds

Question 2

How many gallons are in 1 cubic foot of water?

Answer 2

7.48 gallons in a cubic foot of water

Question 3

How much does 1 gallon of water weigh?

Answer 3

8.35 pounds

Question 4

How much does a 1 foot high column of water weigh?

Answer 4

.434 pounds

Therefore a container is exerting .434psi per foot of elevation regardless of the width of the container.

Question 5

What is the maximum height water can be suctioned at sea level?

Answer 5

33.9 feet

However a rule of thumb is 22.66 feet or 2/3 max due to the inability to obtain perfect suction.

Question 6

How much does elevation effect the height water can be suctioned?

Answer 6

Decreases 1 foot per 1000 feet of elevation gain

Question 7

What is the main determining factor of friction loss?

Answer 7

The velocity flow

Question 8

What does nozzle reaction depend on?

Answer 8

The size of the tip and the pressure

Question 9

How much stronger is the momentary nozzle reaction when the nozzle is first open verses after water has been flowing?

Answer 9

20% stronger

Question 10

The greatest horizontal range of a hose stream is reached at what degree angle?

Answer 10

30 degree angle

Question 11

What is the definition of a good stream?

Answer 11

90% of water falls in a 15’ circle

75% of water falls in a 10” circle