CIT - Certified Irrigation Technician Certified Irrigation Technician Irrigation Principles and Components 1

Question 1

What is the primary advantage of pressure-compensating (PC) drip emitters over standard drip emitters?

Accepted Answer

They deliver a consistent flow rate across a wide range of inlet pressures

Answer

They are less expensive to manufacture and install

Answer

They require no inline filtration to function properly

Answer

They can be buried at any depth without affecting output

Question 2

The Hazen-Williams formula is used in irrigation system design primarily to calculate:

Accepted Answer

Friction loss (pressure drop) in pressurized pipes

Answer

Evapotranspiration (ET) rates for a given climate zone

Answer

Soil infiltration capacity and percolation time

Answer

Sprinkler precipitation rate for a given nozzle

Question 3

Distribution Uniformity (DU) is a performance metric that measures:

Accepted Answer

How evenly water is applied across the entire irrigated area

Answer

The ratio of operating pressure to the design pressure of the system

Answer

The efficiency of the pump motor under full load

Answer

The percentage of applied water that reaches the root zone without surface evaporation

Question 4

A Reduced Pressure Zone (RPZ) backflow preventer is required in an irrigation application when:

Accepted Answer

There is a high-hazard cross-connection where contaminants could seriously harm human health if they entered the potable water supply

Answer

System operating pressure exceeds 80 psi at the point of connection

Answer

The irrigation system uses only drip emitters rather than spray heads

Answer

The total irrigated area exceeds one acre in size

Question 5

In sprinkler layout design, 'head-to-head coverage' means that:

Accepted Answer

Each sprinkler head is spaced so its throw radius reaches the adjacent sprinkler head

Answer

All sprinkler heads are installed flush with the finished grade

Answer

Pairs of sprinkler heads are installed back-to-back on a common riser

Answer

The arc of each head overlaps the adjacent head's arc by exactly 25%

Question 6

When sizing a lateral irrigation pipe, which two factors directly determine water velocity inside the pipe?

Accepted Answer

Flow rate (GPM) and the pipe's internal diameter

Answer

Soil texture and the sprinkler arc setting

Answer

Static water pressure and elevation of the water source

Answer

Emitter spacing and the irrigation scheduling interval