OFTEC Study Guide 2026
Everything you need to pass the OFTEC exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
OFTEC exam key facts
- The OFTEC OFT10-101 assessment is conducted through multiple choice theory papers, practically assessed worksheets (PAWS), and a practical hands-on assessment. Source
- OFTEC registration requires business and technician registration fees plus a one-off joining fee, calculated based on region and scope through the official price calculator. Source
- Candidates who fail to satisfy all performance and knowledge criteria on an OFTEC assessment may take a partial re-assessment limited to the incomplete elements or tasks. Source
- OFTEC OFT10-101 certification is valid for 5 years, after which re-assessment is required. Source
📚 OFTEC Topics to Study (38)
✍️ Sample OFTEC Questions & Answers
1. What is the purpose of the fire valve in an oil supply system?
A fire valve is a fusible link valve installed on the oil supply line near the appliance. In a fire, the fusible link melts (typically at 68°C), closing the valve and cutting off the fuel supply to prevent the fire being fed.
2. What is the net flue gas temperature and why is it important?
Net flue gas temperature is calculated by subtracting the ambient room temperature from the measured flue gas temperature. This figure is used with the CO2 reading to calculate combustion efficiency and assess heat losses.
3. What is the maximum penalty for causing oil pollution to controlled waters?
Pollution of controlled waters is a criminal offence. Penalties include unlimited fines and/or imprisonment. Additionally, the polluter can be liable for the full cost of clean-up operations, which can run to hundreds of thousands of pounds.
4. What does excess air in combustion mean for boiler efficiency?
Excess air beyond what is needed for combustion absorbs heat as it passes through the boiler and carries that heat up the flue. While some excess air is necessary for safe combustion, too much wastes energy.
5. What does a high oxygen (O2) reading in the flue gas indicate?
High O2 readings (above 6-7% for kerosene) indicate excessive air entering the combustion zone. This lowers CO2, reduces efficiency, and may cause flame instability. The air band or damper needs adjusting.
6. What is the environmental benefit of installing a condensing oil boiler versus a non-condensing model?
Condensing oil boilers are 10-15% more efficient than non-condensing models, meaning less fuel is burned to produce the same heat. This directly reduces CO2 emissions (by the same percentage) and lowers fuel costs for the householder.
🎯 Free OFTEC Practice Tests
📖 OFTEC Guides & Articles
What Practice Test Geeks adds beyond an AI chat for OFTEC
An AI chatbot can quiz you, but it can't reproduce the exam conditions or keep your record. Here you get:
- A fixed OFTEC question bank: the same test every attempt, so your score is comparable from one try to the next instead of changing with every regenerated quiz.
- Progress saved on your device: completed tests, scores and missed questions stay in My Progress, so you can retake only what you got wrong.
- A printable OFTEC cheat sheet you can print or save as a PDF.
- OFTEC flashcards built from the same question bank.
- Free OFTEC practice tests with the correct answer shown after each question.
How this page was made: written with AI tools and published by Nathan Beja, founder of Practice Test Geeks, who is responsible for its content. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy
Sources & references
Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy
- bpec.org.uk — Retake policy · verified Oct 2026
- oftec.org — Fees, renewal, eligibility, exam format, score validity, test delivery · verified Oct 2026