Free practice questions

Fifteen sample questions for each certification, written in the style of the real exam, with the reasoning behind every answer, plus a new question every day. The full-length timed mock exams and the complete question banks are in the apps.

Fire alarm (NICET)

NFPA 72 detector spacing, notification appliances, battery sizing, Class A/B circuits and NAC voltage drop.

15 questions, 6 topics · NFPA 72 (2022), NFPA 70 (NEC)

Fire sprinkler (NICET)

NFPA 13 hazard classes, K-factors, Hazen-Williams, spacing rules and NFPA 25 inspection frequencies, explained.

15 questions, 5 topics · NFPA 13 (2022), NFPA 25 (2023)

ERCES / BDA (NICET)

In-building public safety radio: coverage, BDA/DAS components, batteries and monitoring, dB math, testing and FCC rules.

15 questions, 6 topics · NFPA 1225 (2022; formerly NFPA 1221), IFC Section 510

Electrician (NEC)

NEC-style journeyman questions on ampacity, breakers, grounding, box fill and theory, each with an explanation.

15 questions, 6 topics · NEC 2023 (NFPA 70), Basic electrical theory

HVAC core

Refrigeration cycle, charging, airflow, electrical, gas heat and heat pump questions in NATE style, with explanations.

15 questions, 5 topics · ASHRAE Handbook, Fundamentals (psychrometrics and refrigeration), NFPA 70 (NEC) fundamentals

EPA 608

Core, Type I, II and III questions on recovery rules, leak rates and cylinder safety, each with an explanation.

15 questions, 5 topics · 40 CFR Part 82 Subpart F, EPA Section 608 regulations (2016 and 2020 updates)

Plumbing (journeyman)

IPC/UPC-style journeyman questions on DWV, venting, water supply, backflow, water heaters and pipe math.

15 questions, 5 topics · IPC 2021, UPC 2021

Building inspector (ICC)

ICC B1/B2-style questions on stairs, egress, footings, framing, fire separation and occupancy groups.

15 questions, 5 topics · 2021 IRC, 2021 IBC

U.S. citizenship civics

Original questions on the Constitution, government, rights, history and symbols for the USCIS civics test.

15 questions, 5 topics · USCIS Civics Test, 2008 version (100 questions), USCIS Civics Test, 2025 version (128 questions)

How to use these

Each page has a question of the day that changes daily, a 10-question sample drawn at random from the fifteen, and the full list with answers and explanations. Take the sample cold to find your weak topics and read the explanations. When you want the real thing, the matching app has the complete question bank, full-length timed mock exams that match the real test's length, flashcards and progress tracking, and it works offline.

The questions are written by TapForge Studios and are not copies of any real exam. Numbers and rules follow the code editions named on each page; your exam may be based on a different edition, so check the official exam outline.