What does Part L of the Building Regulations primarily address?

Ventilation and indoor air quality

What is the main purpose of the 2021 Part L amendments?

To achieve a 31% reduction in CO2 emissions for new homes compared to previous standards

To achieve a 10% reduction in CO2 emissions for new homes with no change to fabric standards

To require solar PV on the roof of every new dwelling regardless of orientation or shading

To ban the replacement of gas boilers in existing homes from the date of the amendment

Free mock exam

Free Level 3 Mock Exam: Environmental Tech (Unit 2)

Free mock exam for Level 3 Electrical apprentices on Environmental Technologies. 30 questions from a 375-question bank covering solar photovoltaic systems (BS 7671 Section 712), heat pumps, wind generation, EV charging (Section 722), energy efficiency principles, the MCS scheme and grid connection requirements.

Questions: 30
Time limit: 35 min
Pass mark: 70% · 21/30
Question bank: 375

Free, no sign-up. Retake as many times as you like — different questions each time.

Sample questions

01What does Part L of the Building Regulations primarily address?
- AStructure and ground movement
- BConservation of fuel and power
- CVentilation and indoor air quality
- DFire safety and escape routes
Why: Part L of the Building Regulations deals with the conservation of fuel and power, setting standards for energy efficiency in buildings.
02What is the main purpose of the 2021 Part L amendments?
- ATo require solar PV on the roof of every new dwelling regardless of orientation or shading
- BTo ban the replacement of gas boilers in existing homes from the date of the amendment
- CTo achieve a 10% reduction in CO2 emissions for new homes with no change to fabric standards
- DTo achieve a 31% reduction in CO2 emissions for new homes compared to previous standards
Why: The 2021 Part L amendments aim to achieve approximately 31% reduction in CO2 emissions for new homes as a step towards the Future Homes Standard, which comes into force in March 2027.
03When do the Future Homes Standard building regulations come into force in England?
- A24 March 2027
- B1 January 2035
- C24 March 2025
- D1 January 2030
Why: The Future Homes and Buildings Standards were laid before Parliament on 24 March 2026 and come into force on 24 March 2027 (24 September 2027 for some higher-risk building provisions). New homes are expected to produce around 75–80% less carbon than homes built to the 2013 standards.

Common questions

Is the Level 3 : Environmental Tech mock exam free?

Yes, it is free with no sign-up needed. Questions are pulled at random from a substantial bank, with a worked explanation on every question after you submit.

Can I retake the mock exam?

Yes. Every attempt picks a different random selection and reshuffles the options, so each retake gives you genuinely new questions. No limit on retakes.

Does this count as a qualification?

No. This is independent practice material and does not award a qualification, card or certificate. Where a subject has a formal qualification or card, you gain it through an approved provider.