Idaho Limited Electrical Irrigation Sprinkler Installer Practice Exam
Free Practice Exam
Test your knowledge with 10 questions from our pool of 20 free questions.
- 10 questions per attempt
- 30 minute time limit
- Unlimited attempts
- A new mix each time
- Instant results
Full Practice Exam
Complete exam simulation matching the real PSI test format.
- 40 questions (same as real exam)
- 120 minute time limit
- 5 topic areas covered
- 191 questions in pool
- Detailed explanations
Texts preferred · 9am–9pm Central
Idaho Limited Electrical Irrigation Sprinkler Installer Practice Exam Guide
What's on the exam
Questions per topic, out of 40This practice exam follows the official content outline for the Idaho Limited Electrical Irrigation Sprinkler Installer exam: 2017 National Electrical Code, NFPA – Introduction, 2017 National Electrical Code, NFPA – Chapter 1, 2017 National Electrical Code, NFPA – Chapter 2, 2017 National Electrical Code, NFPA – Chapter 3, 2017 National Electrical Code, NFPA – Chapter 6.
- Free practice exam: 10 questions per attempt, retake as often as you like.
- Full practice exam: 40 questions on a 2 hours clock, a new draw from our bank every attempt.
2017 National Electrical Code, NFPA – Introduction 3 items
Our study plan for this topic: Purpose and scope of the NEC (Article 90.1–90.2); Installations covered and not covered by the NEC; NEC code arrangement and chapter organization (Article 90.3); Authority having jurisdiction (AHJ) enforcement and special permission; Mandatory vs. permissive rules and explanatory material (Article 90.5); Equipment examination, listing, and approval (Article 90.7); Wiring planning for future expansion and circuit limitations (Article 90.8); Units of measurement and SI/inch-pound dual system (Article 90.9).
2017 National Electrical Code, NFPA – Chapter 1 5 items
Our study plan for this topic: Key NEC definitions and terminology (Article 100 Part I); Equipment approval, listing, and labeling requirements; Electrical connections, splices, and conductor temperature ratings; Working space and clearances around electrical equipment; Guarding of live parts and enclosure type selection; Equipment marking, arc-flash hazard warnings, and disconnecting means identification; Wiring integrity, wiring methods, and conductor materials and sizes; Article 100 - Definitions.
2017 National Electrical Code, NFPA – Chapter 2 11 items
Our study plan for this topic: Grounding and bonding requirements for electrical systems and equipment (Article 250); Grounding electrode system types, installation, and sizing; Equipment grounding conductor types, sizing, and identification; Bonding methods for services, piping systems, and structural metal; Branch circuit ratings, conductor sizing, and overcurrent protection (Article 210); Branch-circuit, feeder, and service load calculations (Article 220); Overcurrent protection devices, ratings, and locations (Article 240); Outside branch circuits and feeders — clearances, disconnecting means, and conductor requirements (Article 225).
2017 National Electrical Code, NFPA – Chapter 3 5 items
Our study plan for this topic: Underground installation requirements and minimum burial depths (Table 300.5); Conductor ampacity tables and temperature correction/adjustment factors (Article 310); Wiring methods for conduit types: EMT, RMC, IMC, PVC, FMC, LFMC, and LFNC; Type UF and Type USE cable uses permitted and installation requirements; Outlet, junction, and pull box sizing and installation (Article 314); Protection of conductors and raceways against physical damage (300.4); Conductor identification, marking, and insulation types (310.104, 310.120); Cabinets and enclosures: wire-bending space, conductor deflection, and spacing requirements (Article 312).
2017 National Electrical Code, NFPA – Chapter 6 16 items
Our study plan for this topic: Irrigation cable construction requirements and installation standards; Disconnecting means requirements for irrigation machines; Equivalent current ratings for intermittent-duty irrigation machines; Grounding and bonding requirements for irrigation equipment; Collector ring ratings and protection; Several motors on one branch circuit — protection and tap requirements; Center pivot irrigation machine equivalent current ratings; Main control panel marking requirements.
Sample 1 — 2017 National Electrical Code, NFPA – Chapter 6
Question: Which of the following must be included on the nameplate provided on the main control panel of an electrically driven irrigation machine?
- A. The rated frequency
- B. The feeder conductor ampacity
- C. The available fault current
- D. The short-circuit current rating
Correct Answer: A
NEC 2017, 675.6 requires the main control panel nameplate to give the manufacturer's name, the rated voltage, the phase, and the frequency, along with the machine current rating and the rating of the main disconnecting means and size of overcurrent protection required. Available fault current, short-circuit current rating, and feeder ampacity are markings required elsewhere in the Code, not by 675.6.
Reference: NEC 2017 Section 675.6
Sample 2 — 2017 National Electrical Code, NFPA – Chapter 2
Question: A 400 A service uses 600 kcmil copper service conductors. What is the minimum size of a copper grounding electrode conductor that runs only to a concrete-encased electrode?
- A. 2 AWG
- B. 4 AWG
- C. 3/0 AWG
- D. 1/0 AWG
Correct Answer: B
Table 250.66 would require a 1/0 AWG copper grounding electrode conductor for 600 kcmil copper service conductors, but 250.66(B) says a grounding electrode conductor (or bonding jumper) that runs only to a concrete-encased electrode is not required to be larger than 4 AWG copper. So the minimum size required here is 4 AWG copper.
Reference: NEC 2017 Section 250.66(B), Table 250.66
Sample 3 — 2017 National Electrical Code, NFPA – Chapter 1
Question: Per NEC Article 110.12, what requirement applies to the mechanical execution of electrical work?
- A. All work must be performed by a licensed journeyman electrician
- B. Unused openings in boxes, raceways, and enclosures shall be effectively closed
- C. All conductors must be color-coded at every junction point
- D. Work must be inspected within 48 hours of completion
Correct Answer: B
Per NEC 110.12(A), unused openings other than those intended for the operation of equipment, those intended for mounting purposes, or those permitted as part of the design for listed equipment shall be effectively closed to afford protection substantially equivalent to the wall of the equipment. This is a key requirement under the mechanical execution of work section.
Reference: NEC 2017 Section 110.12(A)
- Your results break the score down by outline topic.
- The real exam's passing score: a minimum score of 70.
- Keep practicing until you pass consistently, not just once.
- Answer what you know first and bookmark the rest. Our practice exams let you bookmark and come back.
- Work your bookmarks on the second pass.
- Real exam pace: about 3 minutes per question.
- After each attempt, look up every miss in your book.
| Questions | 40 questions |
| Time limit | 2 hours |
| Passing score | a minimum score of 70 |
| Books in the exam room | Open book |
| Exam fee | $75 |
- Your score is shown on screen at the end of the exam and a score report is provided, with a diagnostic report of strengths and weaknesses if you fail.
- If you do not pass, you may retake the exam as many times as needed, paying an examination fee for each attempt.
Source: Examination Scheduling Procedures / Examination Guide (Idaho PSI Candidate Bulletin), Effective 7/9/2026. Check the bulletin before test day: fees and rules can change.