You May Not Finish the Section 2 NBC/NECB Exam, and You Can Still Pass

Take a breath: not finishing every question in ExAC Section 2 is normal, and it does not mean you failed. Section 2 is the open-book Codes section, and navigating a tabbed NBC 2020 and NECB 2020 under timed scenarios eats minutes you cannot get back. In our years of working with Intern Architects through every sitting, our team at Examitect, an independent ExAC prep platform unaffiliated with the CACB, has seen one clear pattern: the candidates who pass are the ones who pace aggressively, move on from stuck questions inside two minutes, and never leave a scantron bubble blank. You can be one of those candidates with a simple, repeatable approach.

Key Takeaways

The seven Section 2 pacing rules every ExAC candidate should know.

  • Not finishing Section 2 is normal, and it does not equal failing. ExAC scoring is competency-based, not a percentage of items completed. The ExAC 2026 Exam Guide walks through how passing is actually calculated.
  • Spend no more than two minutes on any single Section 2 question. If you are not making progress at the 90-second to two-minute mark, bubble your best guess and move on. The clock does not stop.
  • Never leave a scantron bubble blank. A blank is a guaranteed zero; a guess gives you roughly 25 percent odds on a four-option question. Always fill something in, even on items you skip mentally.
  • Open book in Section 2 only means NBC 2020 and NECB 2020. No CHOP, no CCDC, no annotations. Tab NBC 2020 and NECB 2020 so any clause is findable in under 30 seconds.
  • Drill code navigation, not clause numbers. The ExAC tests applying a clause to a scenario; build the muscle of locating Part 3 versus Part 9 fast, not reciting 3.8.3.2 from memory.
  • Practise under a clock at home. Untimed reading creates false confidence; timed Section 2 simulations calibrate the actual exam pace. The practice questions vs mock exams guide walks through the blend.
  • Triage as you go: easy stack first, lookup stack second. Bubble every easy hit before returning to the hard code lookups. Do not lose six minutes on Question 3 before you have answered Question 4. See the Section 2 overview for the full topic list.

Overview

At a glance

SectionExAC Section 2 (Codes), the only open-book section
Permitted referencesNBC 2020 and NECB 2020 only, clean or with permanent printed tabs
Working pace60 to 90 seconds per question on average
Stuck threshold90 seconds to two minutes; past two minutes, bubble and move on
Scantron ruleNever leave a bubble blank, including on questions you guess at
Common derailersPart 3 vs Part 9 lookups, spatial separation tables, NECB envelope tables
Best preparationTimed Section 2 simulations with only your tabbed code books on the desk
Pass standardCompetency-based cut score, not a percentage of items completed

Why Section 2 runs out of time

ExAC Section 2 is the only open-book section, and that is precisely why it eats time. You are not testing recall; you are testing whether you can read a scenario, identify the relevant Code Part, locate the right clause, and apply it under a clock. Every one of those steps takes seconds, and the seconds add up. Across roughly two hours, a candidate who has not drilled NBC 2020 navigation under time pressure burns through the clock faster than they expect.

Three forces make Section 2 the most time-pressured part of the ExAC for many Intern Architects:

  • Navigation is part of the test. You are not asked to recite NBC 2020 Part 3, Section 3.8. You are asked to find it, read it, and apply it. Each lookup is its own micro-task with its own clock.
  • The NBC and NECB are dense. NBC 2020 alone spans multiple volumes; NECB 2020 adds another. Without sharp, well-rehearsed tabs, locating a clause can take 60 to 90 seconds you do not have.
  • Working knowledge of the code is not the same as exam knowledge. Architects who use the NBC every day at work often discover that timed scenarios on spatial separation, accessibility, or Part 9 small buildings feel very different in the exam room.

The Examitect approach, refined from the post-exam debriefs our team runs with Intern Architects across every sitting, is to plan Section 2 around the honest assumption that you may not finish every question, and to build a strategy that still gets you to pass.

The pacing rule: under two minutes per question

~90sworking pace

Working pace: 60 to 90 seconds per Section 2 question, on average.

Hard ceiling: two minutes per question. Past that, bubble a best guess and move on.

Two minutes is your stuck threshold, not your average. If you are still wrestling with a question at the 90-second to two-minute mark, your decision is already made for you: bubble your best-guess answer, mark the question in your booklet, and move to the next item.

The math is unforgiving. If Section 2 gives you roughly two hours for a code-heavy multiple-choice set, the average pace is well under 90 seconds per question. You can afford a handful of two-minute lookups only if the rest of the section is moving under 60 seconds. Spend six minutes on Question 4 and you have stolen the time needed to attempt Questions 47, 48, and 49.

Set a small pacing checkpoint in your head. At every tenth question, glance at the clock. If you are tracking on pace, keep going. If you are behind, your next move is to speed up the easy items, not to slow down the hard ones. The candidates we see pass Section 2 cleanly are not the ones who solve every question; they are the ones who refuse to let any single question consume disproportionate time.

Never leave a scantron bubble blank

This one is non-negotiable: every question on your scantron sheet gets a bubbled answer before you leave the room, including the questions you skipped mentally, the ones you guessed at, and the ones you ran out of time on.

A blank bubble earns zero marks. A guess earns either zero or full marks, but never less than zero. On a four-option multiple choice question, even a fully random guess gives you a 25 percent expected return. On a question where you can eliminate one or two implausible options, the odds climb meaningfully. The arithmetic is one-way: a guess can never hurt you compared to a blank.

This rule changes how you handle the final minutes of the section. With three minutes left, do not start a fresh question. Do scan your scantron sheet for any blanks and fill them all in with a single default letter (many candidates default to B or C). It is the highest-yield use of the last minute of Section 2.

There is one piece of language worth getting right: "mark and move on" means two different things on two different surfaces. In your booklet, you can flag a question (a small pencil dot beside the question number) to remind you to revisit. On the scantron, there is no such thing as a "come back" mark; either the answer is bubbled or it is not. Bubble first, flag second. Your scantron should never hold a blank while you are flagging in the booklet.

How to navigate NBC 2020 and NECB 2020 under pressure

Code navigation is a learnable skill, and it is the single biggest predictor of finishing Section 2 with marks in hand. Three layers, used in order, get you to any clause fast.

  1. Your tabs. Permanent printed tabs flagging the major Parts and Sections of NBC 2020 are the workhorse. A well-tabbed code book gets you to a Part in under five seconds.
  2. The table of contents. When you know the topic but not the Section, the TOC narrows your target before you flip pages.
  3. The index. Use sparingly. The NBC index is alphabetical and not always intuitive (try "Spatial separation" versus "Exposing building face"). When tabs and TOC have failed, the index is the last resort.

A tighter set of high-value tabs beats a sprawling tab system. Examitect's working list for NBC 2020 covers the Parts and Sections candidates actually need under time pressure: Part 3 (especially Sections 3.2, 3.3, 3.4, 3.6, 3.7, and 3.8), Part 9 small buildings, the Division B Part 3 fire and life safety tables, and the accessibility provisions. For NECB 2020, the high-value tabs are concentrated in the envelope and energy-efficiency tables and the prescriptive-versus-performance path decision branches. The NBC 2020 study guide and the NBC 2020 Part 3 vs Part 9 explainer walk through both in detail.

The gear shift between Part 3 and Part 9 is the navigation skill that wins back the most time on exam day. Knowing the applicability rule before you flip a page, and tabbing both Parts so you can move between them in seconds, saves you a minute on every Part 3 versus Part 9 question. That minute is the difference between attempting the last five questions of the section and leaving them at zero.

Triage: which questions to answer first

A two-pass strategy beats a strict front-to-back read for almost every Section 2 candidate.

Pass 1: the easy stack

Move through the section once and answer every question you can finish in under 60 seconds. Bubble the answer on the scantron and flag the booklet number on any question that needed more than a glance. Questions in this pass are usually the ones where you recognise the code area instantly and the lookup is short, or where you can answer from familiarity without opening the book at all.

Pass 2: the lookup stack

Return to the flagged questions. These are the ones where the answer required deeper code navigation. Spend up to two minutes on each, but no more. If a question still has you stuck at two minutes on Pass 2, eliminate any options you can rule out, bubble the best of the remaining choices, and move to the next flag.

The bubble-everything sweep

With three minutes left, abandon both passes and verify every bubble on the scantron sheet. Any blanks get filled in with a single default letter. A 25 percent shot is always better than a guaranteed zero, and the sweep is the cheapest insurance you can buy in the final minute.

This two-pass approach is also a small confidence trick. Solving 25 easy questions in the first 30 minutes calibrates your sense of pace and quiets the panic that creeps in when Question 3 stumps you. The wins build the recall, and the recall builds the pace.

What to do when you are stuck on one question

A simple decision tree, applied consistently, saves the section. From the moment your eyes land on a hard question:

Time elapsed What you should be doing
0 to 20 seconds Read the question. Identify the keywords. Note which Code Part is in play (NBC Division B Part 3, Part 9, NECB envelope, accessibility, spatial separation, fire and life safety).
20 to 80 seconds Locate the clause. Tabs first, TOC if tabs miss, index if both miss. If you are still flipping pages at the 60-second mark, your tabs need a future fix; right now, accept the loss and move toward an educated guess.
80 to 110 seconds Apply the clause. Read it, match it to the scenario, eliminate options that contradict it.
110 to 120 seconds Lock in a best guess. Pick the option that fits the clause most cleanly. If two options are close, choose the one that aligns with the most restrictive interpretation; the ExAC tends to reward conservative code application.
Bubble and move on Mark the question number in your booklet if you may want to revisit. Never leave the scantron blank.

The hardest move is the move-on. Architects who care about being right struggle to leave a question they have not solved. The fact you must internalise is that one solved question is worth the same as one guessed question that turns out correct, but a six-minute hunt for a perfect answer costs you the chance to attempt several other questions. Section 2 rewards aggregate marks, not individual perfection.

Common Section 2 pacing mistakes

Every ExAC cycle, the same reference-side and pacing mistakes show up in the post-exam debriefs our team runs with Intern Architects. Reading them now is cheaper than discovering them in the exam room.

  • Letting one question consume six minutes. The honest stop is two minutes. Past that, you are no longer studying for the question; you are losing the section.
  • Leaving the scantron blank because "I will come back". You will often not have time to come back. Bubble a guess every time, then flag in the booklet. The bubble is insurance against the clock.
  • Trying to read the code from scratch in the room. Section 2 is open book; it is not closed-text comprehension. If you are reading a clause cold for the first time, your study did not include enough timed scenario drilling.
  • Tab inflation. A code book with 60 tabs is a code book without tabs. Fewer, high-value tabs on the Parts and Sections that show up in scenarios beat an over-tabbed system that you have to scan one tab at a time.
  • No timed practice at home. Untimed reading creates false confidence. The pace, the fatigue, and the panic only feel real when you have run a timed Section 2 simulation before exam day. The practice questions vs mock exams blog walks through the blend that builds both.
  • Memorising clause numbers. The ExAC does not test whether you can recite 3.8.3.2 from memory. It tests whether you can find and apply it. Study time on rote clause numbers is study time wasted.
  • Debriefing other candidates between sections. The Section 2 is over; arguing about it in the hallway only burns the focus you need for the afternoon. Reset and protect the next section.

The week-before pacing rehearsal

Pacing is muscle memory, not a strategy you read on exam morning. The final seven days are when you lock in the rhythm.

  • Day 7 to Day 5: timed mini-sections. Run two or three 30-minute timed Section 2 simulations using practice questions. Watch your stuck threshold; if you blow past two minutes, mark it and reset.
  • Day 4 to Day 3: finalise tabs. Pull any tabs you have not used in the last three practice sessions. Add tabs to anywhere you got lost. Keep the total under 30 tabs on each book.
  • Day 2: one full Section 2 mock. Sit two hours, no phone, a scantron-style answer sheet, only NBC 2020 and NECB 2020 on the desk. Treat it like the real thing. Review only the questions you missed.
  • Day 1: rest and pack. Photo ID, candidate confirmation, two or three pencils, eraser, sharpener, calculator, water, NBC 2020, NECB 2020. Sleep early.
  • Exam morning: arrive 30 minutes early, breathe, and trust the rehearsal. The candidates who finish Section 2 confident, even when they did not finish every question, are the ones who lived the pacing during practice.

Study smart, not exhaustive. Pace, move on, never leave a blank, and Section 2 takes care of itself.

FAQ

ExAC Section 2 pacing frequently asked questions

No, finishing every question is not required to pass ExAC Section 2. The ExAC uses a competency-based cut score, not a percentage of completed items. Many candidates who pass Section 2 leave at least a few questions guessed at because they ran out of time. What matters is total marks earned, including marks earned by educated guesses on every bubbled answer.

Aim for an average of 60 to 90 seconds per ExAC Section 2 question, with a hard ceiling of two minutes per question. At two minutes, bubble your best guess, mark the question in your booklet, and move on. The average has to absorb the few hard lookups that take longer than two minutes.

No. Never leave a scantron bubble blank in ExAC Section 2. A blank earns zero marks. A random guess on a four-option multiple choice question gives you a 25 percent expected return; an educated guess after eliminating one or two implausible options gives you better odds. Filling in something is always better than leaving a blank.

Each ExAC section is graded against a competency-based cut score, and a blank and a wrong answer both earn zero marks for the item. There is no additional penalty subtracted for a wrong answer. That is why bubbling a guess is always a positive expected-value play compared to leaving a blank, particularly in Section 2 where time pressure forces some questions to be guessed.

Use a two-minute hard ceiling. If you reach two minutes without a confident answer, eliminate any options you can rule out, bubble the best of the remaining choices, mark the question number in your booklet, and move to the next item. Two minutes is not your average pace; it is the line past which a question is taking time from your other answers.

Only the NBC 2020 (National Building Code of Canada) and the NECB 2020 (National Energy Code of Canada for Buildings) are permitted in ExAC Section 2. CHOP, CCDC contracts, RAIC documents, hand-written notes, and sticky-note annotations are not allowed. Candidates bring clean or lightly tabbed copies of the two code books.

Permanent printed tabs that flag Sections or Parts are accepted by most host sites. Hand-written annotations, sticky notes with notes written on them, loose paper, and any second reference book are not permitted in ExAC Section 2. Always confirm the current rules in your sitting instructions before exam day.

Use fewer, high-value tabs covering NBC 2020 Part 3 Sections 3.2, 3.3, 3.4, 3.6, 3.7, and 3.8, plus Part 9 small buildings, the fire and life safety tables, and the accessibility provisions. Keep the total under 30 tabs per book. An over-tabbed code book takes longer to scan, not less.

ExAC Section 2 is timed independently and typically runs in the range of two to three hours, depending on the sitting. Each item is multiple choice and open book, with NBC 2020 and NECB 2020 permitted. The host site confirms the exact length in your sitting instructions.

In the final three minutes of ExAC Section 2, stop trying to solve new questions. Sweep your scantron sheet and bubble in any blanks with a single letter. Filling every blank with a guess earns more marks on average than leaving them at zero. Plan for this sweep; it is the highest-yield use of the last minute.

You can revisit questions during ExAC Section 2 while the clock is still running. There is no after-the-section return; once time is called, the booklet is closed. If you flagged questions in your booklet during your first pass, return to them as a second pass while remaining time allows.

Run timed ExAC Section 2 simulations using practice questions and only your tabbed NBC 2020 and NECB 2020 on the desk. Limit yourself to the actual section time, watch the two-minute stuck threshold on every question, and review only the items you missed. Untimed reading does not build the recall and pace the exam rewards.

ExAC Section 2 is widely considered the most time-pressured part of the exam because navigation through the NBC 2020 and NECB 2020 takes real time, even with sharp tabs. The time pressure is not unique to Section 2, but it bites harder there because each question carries a lookup overhead the closed-book sections do not.

The most common ExAC Section 2 pacing mistake is letting one question consume four to six minutes. Past the two-minute mark, the question is no longer building marks; it is taking marks from later questions the candidate has not yet attempted. Bubble a guess at two minutes and move on, every time.