CIT - Certified Irrigation Technician Electrical Systems and Wiring Questions and Answers

Question 1

A technician is installing a low-voltage irrigation system.
According to the National Electrical Code (NEC), what is the minimum required burial depth for low-voltage landscape wiring (under 30 volts)?

Accepted Answer

6 inches

Answer

3 inches

Answer

12 inches

Answer

18 inches

Question 2

When making a wire splice in an irrigation valve box, which of the following is the most critical feature of the connectors used?

Accepted Answer

They must be waterproof and approved for direct burial.

Answer

They must be color-coded.

Answer

They must be the twist-on type.

Answer

They must be rated for direct sunlight exposure.

Question 3

An irrigation system has a total load of 1.5 amps on a 24-volt circuit. To properly size the transformer, a technician should select a transformer with a VA (Volt-Amps) rating that is:

Accepted Answer

Slightly greater than 36 VA

Answer

Exactly 36 VA

Answer

Slightly less than 36 VA

Answer

At least double, 72 VA

Question 4

A technician measures the resistance (ohms) across the two wires leading to a normally closed solenoid and gets a reading of 'OL' or infinity. What is the most likely problem?

Accepted Answer

A broken wire or a bad splice.

Answer

A short circuit in the wiring.

Answer

A stuck-open valve.

Answer

The controller is sending too much voltage.

Question 5

Which type of wire is specifically designed and rated for direct burial in landscape and irrigation applications?

Accepted Answer

UF-B

Answer

THHN

Answer

Romex (NM-B)

Answer

Coaxial

Question 6

When troubleshooting an irrigation zone that will not turn on, the technician confirms the controller is sending 24 VAC. The next logical step using a multimeter is to:

Accepted Answer

Measure the resistance (ohms) of the solenoid and field wiring at the controller.

Answer

Check the amperage at the transformer.

Answer

Verify the GPM of the sprinkler heads in that zone.

Answer

Test the voltage at the backflow preventer.

A technician is installing a low-voltage irrigation system.According to the National Electrical Code (NEC), what is the minimum required burial depth for low-voltage landscape wiring (under 30 volts)?

A technician is installing a low-voltage irrigation system.
According to the National Electrical Code (NEC), what is the minimum required burial depth for low-voltage landscape wiring (under 30 volts)?