1.2 Exam Format, Scoring & No-Calculator Policy

1.2 Exam Format, Scoring & No-Calculator Policy

Quick Answer: Per IO Solutions, the NFSI has 105 cognitive items and 50 behavioral orientation items (155 total). You get 2½ hours to complete the exam, plus roughly 15 minutes for instructions. Dictionaries, electronic devices, and calculators are not allowed. Many agencies cite a ~70% benchmark, but each department sets its own cutoff and ranking rules.

Confirm every logistics detail with the hiring flyer for your department. Session packages sometimes add other IOS products (for example, an SBSA situational judgment module) with their own clocks — those extras are not part of the NFSI itself. Mixing product specs from Firefighter Selection Tool (FST), Next Generation Firefighter (NGFF), or FireTEAM into your NFSI plan will produce the wrong pacing and the wrong content expectations.

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Official Item Counts and Timing

Candidate portals (for example Naperville FD testing pages hosted by IOS) restate the same structure: Section I = 105 cognitive items; Section II = 50 behavioral-orientation questions; 2½ hours to finish the NFSI.

Pacing implications

Across 155 items in 150 minutes you average about 58 seconds per item. In practice, budget roughly 90–120 minutes for the 105 cognitive items and 25–35 minutes for the 50 behavioral items, leaving a short review buffer. Chapter 10.2 expands the three-pass plan to the full 150-minute clock.

Do not plan for a 100-item / 120-minute exam. Those numbers appear in older third-party summaries and will under-pace you on the real IOS form. If a prep booklet still markets "100 questions in two hours," treat it as outdated marketing, not the current IOS product sheet.

Why the instruction block matters

The ~15 minutes of instructions are usually outside the 150-minute working clock. Use that time to clarify bubble-sheet vs computer interface rules, how to mark answers, and whether you may return to earlier items. Do not start racing through cognitive stems while the proctor is still explaining answer-sheet conventions — misbubbled pages are expensive to fix later.

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Delivery Format and Sequencing

Agencies may deliver the NFSI as paper-and-pencil (scantron) or computer-based testing. Cognitive blocks typically appear first; the Likert-style behavioral inventory usually follows. Cognitive items are multiple-choice with four options. Behavioral items ask you to rate agreement with self-descriptive statements.

IOS does not require firefighting experience. Passages and scenarios use fire-service context so the abilities feel job-related, but the scored construct is ability — not academy trivia. A reading stem about hose lays or an SOP excerpt is testing whether you can extract facts and apply rules from the text provided, not whether you already know NFPA chapter numbers from memory.

Paper vs computer habits

• On paper, keep your place with light pencil marks on the booklet margin and confirm every fifth answer number matches the bubble row.
• On computer, learn whether the interface locks answered items or allows flagging for review.
• Either way, never leave a blank if guessing is not penalized — confirm the local scoring rule during instructions.

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Strict No-Calculator (and No-Dictionary) Policy

IOS materials state that during the NFSI you may not use aids such as dictionaries, electronic devices, or calculators. Expect:

• No phones, smartwatches, tablets, or fitness bands in the testing room
• No personal formula sheets or reference books
• Only proctor-issued pencils and scratch paper (when provided)

You must execute long division, fraction/decimal work, percentages, ratios, and area/volume by hand. That is why Chapters 8–9 emphasize scratch-paper layouts and mental arithmetic drills. Treat mental math as a scored skill, not a side hobby: a candidate who understands friction-loss concepts but cannot divide 450 by 75 cleanly still loses Mathematical Reasoning and Number Facility points.

High-frequency calculation traps

• Unit mismatches (feet vs inches; minutes vs hours; gallons vs liters)
• Skipping a conversion before dividing rates
• Rounding too early on multi-step word problems
• Misreading a chart axis or table header on Mathematical Reasoning items
• Losing a decimal place when converting percentages to decimals (35% → 0.35, not 3.5)

Scratch-paper discipline worth practicing

Write intermediate results in a vertical column, label each with a short word ("gpm," "minutes," "sq ft"), and box the final answer before transferring it to the answer sheet. Messy arithmetic is the most common preventable miss on timed public-safety cognitive exams.

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Scoring, Cutoffs, and Lists

IOS prices and scores the exam for the hiring department. Agencies then:

1. Apply a cutoff (commonly discussed as about 70%, but not a single universal IOS pass mark)
2. Rank remaining candidates on an eligibility list
3. Apply local preference points, banding, or residency rules where authorized

Competitive departments often interview from the top of the list, so clearing a minimum cutoff is not the same as being hireable. Score validity windows (often cited as about 12 months) and retake limits (some programs allow a limited number of attempts within six months) are agency policies, not a single national IOS rule. Always read your announcement.

How cognitive and behavioral scores interact

IOS describes the exam as combining cognitive ability with behavioral orientation into an overall score. Treat both halves seriously: a polished cognitive score paired with an inconsistent behavioral profile can still hurt ranking. Do not "save" the behavioral inventory for a two-minute rush at the end of the clock; that pattern creates the exact inconsistencies consistency checks are designed to catch.

What "70%" usually means in practice

When a flyer says candidates must score at least 70%, confirm whether that threshold applies to the combined score, the cognitive portion only, or an agency-specific scaled metric. Some departments also publish residual list life (for example, scores valid for 12 months) that is independent of IOS's psychometric design. Write those local rules on a sticky note before test day so you do not confuse vendor logistics with civil-service list rules.

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Administrative Specs Cheatsheet

Test-room security may include ID checks, bag storage, and monitored seating. Follow proctor instructions exactly — administrative dismissals end the process regardless of preparation quality. Bring the exact ID forms listed on the invitation, leave banned electronics in the car or locker, and expect to stay seated for the full session unless a restroom break is explicitly allowed under timed conditions.

If your department administers additional assessments the same day (PAT, oral board, or a separate situational-judgment product), treat those as separate clocks and separate scoring rules. Your NFSI strategy still rests on the official IOS pair: 105 cognitive + 50 behavioral inside 2½ hours.