ACCA Manual J Practice Test

The ACCA Manual J Practice Test is a free intermediate-level, 20-minute skill test from Science of Apps. It tests residential load calculation knowledge for ACCA Manual J — design conditions and heat transfer basics, envelope loads through walls, windows and ceilings, infiltration, ventilation and duct loads, and internal gains, latent loads and equipment selection — written to ANSI/ACCA Manual J (8th edition), ASHRAE climatic data and DOE sizing guidance for 2026. Score 70% or more on its 20 questions to earn a verifiable Manual J Load Calculation certificate (SOA-MJ). Every question is based on published standards and research — including ANSI/ACCA Manual J Residential Load Calculation (8th edition) (Air Conditioning Contractors of America), Sizing heating and cooling systems (US Department of Energy), ANSI/ACCA Manual S Residential Equipment Selection (Air Conditioning Contractors of America) — and each answer is explained with its source.

Yes. Science of Apps has a free ACCA Manual J Practice Test built on the current ACCA exam outline for 2026 and 2027. It covers heat gain and loss, design conditions, and infiltration, scores you instantly and issues a verifiable certificate.

Read the four skill areas on this page, then take the 20-minute test online — no fee, course or sign-up. You see every answer explained when you finish. Score 70% or more and you get a Manual J Load Calculation certificate straight away, on screen, as a PDF and by email, with a credential ID anyone can verify.

Yes. The questions are original scenarios written by Science of Apps, and each one is based on a public source you can read: ANSI/ACCA Manual J Residential Load Calculation (8th edition) (Air Conditioning Contractors of America); Sizing heating and cooling systems (US Department of Energy); ANSI/ACCA Manual S Residential Equipment Selection (Air Conditioning Contractors of America). The source is shown under each question and linked in the answer review. Science of Apps doesn't copy questions from other tests.

Four skill areas with five questions each, drawn from a bank of 10 per area so a retake brings new questions: Design Conditions and Heat Transfer (Design temperatures, Heat transfer modes and U-values); Envelope Loads (Walls and roofs, Windows and doors and Foundations); Infiltration, Ventilation and Duct Loads (Air leakage, Mechanical ventilation and Duct losses and gains); Internal Gains, Latent Loads and Equipment Selection (Internal gains, Latent load and Sizing equipment). Every question is an original scenario written to the 2026–2027 standard, with the published source named under it.

HVAC designer, HVAC technician, Energy auditor, Mechanical contractor and Building performance consultant. It suits anyone who wants a quick, verifiable way to show ACCA Manual J knowledge in 2026 and 2027, from students and career switchers to experienced professionals.

Many US codes (IRC M1401.3 and the IECC) require heating and cooling equipment to be sized using ACCA Manual J (loads) and Manual S (equipment). Oversized systems short-cycle, dehumidify poorly and waste energy.

No. Rules of thumb ignore insulation, windows, orientation, airtightness and climate. Manual J calculates loads room by room from the building's actual characteristics.

No. It is an independent practice test written to the publicly available ACCA Manual J content outline for 2026 and 2027, for checking your readiness before you book the real exam. Passing earns a Science of Apps certificate rather than the official credential.

Yes. The test is online, in English and free everywhere — people take it from India, the US, the UK, Europe, Africa, Latin America and Asia-Pacific. Your certificate is dated with your own local date and can be verified from anywhere at scienceofapps.com/certification/verify/.

20 questions — 5 from each of 4 skill areas — with a 20-minute limit. You need 70% (14 of 20) to pass and 90% for distinction.

We rate it Intermediate: assumes hands-on experience in the role. It has 20 scenario questions — 5 from each of 4 skill areas — and a 20-minute limit. You need 70% (14 of 20) to pass and 90% for distinction.

Nothing. There is no fee to take a test, to receive the certificate, to have it emailed or to verify it, and no sign-up.

On our server, not in your browser. The answers never reach the page until you submit, so a certificate can only be earned by passing. Each certificate gets a unique credential ID stored by Science of Apps.

You see your score for each area and every question with the correct answer and why, with the published source behind it. You can retake after 30 minutes, and the retake draws questions you haven't seen yet.

No. Every certificate is dated, so it always shows when you passed. Retake a test any time for a newer date or a higher score.

Yes. After you pass, Add to LinkedIn opens the Licenses & certifications form with the certificate name, Science of Apps as the issuer, the issue date, your credential ID and the verification link filled in. You can also download it as a PDF or PNG, and it's emailed to you as a PDF.

Every certificate has a credential ID and a QR code. Scanning it, or entering the ID at scienceofapps.com/certification/verify/, shows the holder's name, the certification, the score and the issue date from our records.

No. They are Science of Apps' own assessments of applied skill. They aren't issued by a university or standards body, and they work best alongside a portfolio that shows the skills in real work.