CIT - Certified Irrigation Technician Hydraulics and Water Management 2

Question 1

A sprinkler system mainline has a static pressure of 65 PSI. After opening a zone with four spray heads, the pressure drops to 48 PSI. What is the pressure loss in the system?

Accepted Answer

17 PSI

Answer

48 PSI

Answer

65 PSI

Answer

113 PSI

Question 2

According to the Hazen-Williams equation, as pipe diameter increases, friction loss per unit length:

Accepted Answer

Decreases significantly

Answer

Increases proportionally

Answer

Remains the same

Answer

Fluctuates unpredictably

Question 3

What is the recommended maximum velocity of water flow in irrigation mainline pipes to minimize water hammer and friction loss?

Accepted Answer

5 feet per second

Answer

2 feet per second

Answer

10 feet per second

Answer

15 feet per second

Question 4

A pressure gauge at the base of a hill reads 60 PSI. The irrigation zone at the top of the hill is 46 feet higher in elevation. What is the approximate pressure available at the top of the hill (ignoring friction loss)?

Accepted Answer

40 PSI

Answer

60 PSI

Answer

80 PSI

Answer

20 PSI

Question 5

What is the purpose of a pressure regulator in an irrigation system?

Accepted Answer

To reduce and maintain constant downstream pressure regardless of supply pressure fluctuations

Answer

To increase pressure for zones at higher elevations

Answer

To eliminate water hammer

Answer

To filter debris from the water supply

Question 6

The 'flow rate' of an irrigation system is typically measured in which unit?

Accepted Answer

Gallons per minute (GPM)

Answer

Pounds per square inch (PSI)

Answer

Feet per second (FPS)

Answer

Cubic feet per hour (CFH)