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1.3 CBT Strategy, AITs, Calculators, and Pacing
NCEES PE Control Systems Engineering Exam Exam
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1 Introduction & Exam Overview
1.1 Current Exam Facts 1.2 Handbook, ISA-5.1, and IEC 61511 on Exam Day 1.3 CBT Strategy, AITs, Calculators, and Pacing
2 Process Measurement Sensors
2.1 Pressure, Level, and Temperature Sensors 2.2 Flow, Counter, and Motion Sensors 2.3 Analytical Instruments and Sampling Systems
3 Specialty Sensors and Characteristics
3.1 Fire and Gas Detectors 3.2 Machinery Monitoring and Protection 3.3 Sensor Characteristics: Accuracy, Calibration, and Dynamics
4 Selection, Installation, and Primary Calculations
4.1 Sensor Selection and Material Compatibility 4.2 Sensor Installation Details and Drawings 4.3 Flow Calculations 4.4 Level Calculations
5 Conversions, Thermowells, and Checkout
5.1 Process Measurement Unit Conversions 5.2 Thermowell Design and Wake Frequency 5.3 Sensor Testing and Commissioning
6 Drawings, Dynamics, and PID
6.1 P&IDs, Loop Diagrams, and ISA-5.1 Symbology 6.2 Process Dynamics and Loop Response 6.3 Feedback Control and PID
7 Advanced, Discrete, and Process Applications
7.1 Feedforward, Cascade, Ratio, Override, and Split-Range 7.2 Discrete and Sequential Control 7.3 Control of Common Process Equipment
8 HMI, Alarms, Logic, and Architecture
8.1 HMI, Displays, and Control-Room Layout 8.2 Alarm Management 8.3 IEC 61131-3 Logic Implementation 8.4 DCS, PLC, SCADA Architecture and Interfaces
9 Capacity, Testing, and Cybersecurity
9.1 Capacity, Availability, Heat Load, Power, and Environment 9.2 FAT, IST, SAT, and Commissioning 9.3 Performance Monitoring and Management of Change 9.4 Control-System Cybersecurity
10 Valve Type, Trim, Sizing, and Actuators
10.1 Valve Types and Materials 10.2 Valve Trim, Leakage Class, and Characteristics 10.3 Valve Sizing, Pressure Drop, and Split-Range 10.4 Actuators and Failure Modes
11 Fluid Dynamics, Accessories, and Relief Types
11.1 Cavitation, Flashing, Choked Flow, and Noise 11.2 Valve Accessories and Installation 11.3 Pressure-Relieving Device Types and Installation 11.4 Pressure-Relieving Device Calculations
12 Motors, Solenoids, Regulators, and Checkout
12.1 Motor Starters, VSDs, and Soft Starters 12.2 Solenoid Valves and Relays as Final Elements 12.3 Self-Regulating Devices 12.4 Final Element Testing and Commissioning
13 Signal Types and Conversion
13.1 Analog and Discrete Signal Types 13.2 Buses, Topologies, and Digital Protocols 13.3 Signal Conversion, I/P, Splitters, and Bit Precision
14 Hazardous Areas, Power, and Circuits
14.1 Hazardous-Area Methods and Intrinsic Safety 14.2 Power, Grounding, Segregation, and EMI 14.3 Two-Wire, Four-Wire, and Loop Calculations
15 Media and Network Architecture
15.1 Transmission Media: Copper, Fiber, Wireless 15.2 TCP/IP, OPC, Addressing, and Architectures 15.3 OPC, Network Addressing, and Segmentation
16 Lifecycle and Risk Allocation
16.1 IEC 61511 Lifecycle Structure and Phases 16.2 Hazard and Risk Assessment 16.3 LOPA, IPLs, and SIF Identification
17 SRS, Design, and SIL Calculations
17.1 Safety Requirements Specification 17.2 SIS Design, Device Selection, and Constraints 17.3 SIL Calculations and Formulas
18 SAT, Proof Testing, and MOC
18.1 Installation, Commissioning, Validation, and SAT 18.2 Operation, Proof Testing, Demands, and Bypasses 18.3 Modification, Decommissioning, and MOC
1.3 CBT Strategy, AITs, Calculators, and Pacing
Key Takeaways Explain This Topic AI
Alternative item types include multiple-correct, point-and-click, drag-and-drop, and fill-in-the-blank; every item, including AITs, is scored correct or incorrect with no partial credit.
Wrong answers do not deduct points, so leaving a blank is worse than an informed guess—especially on a once-yearly exam.
The 2026 NCEES calculator list (reviewed annually) allows Casio fx-115 and fx-991 models, HP 33s and 35s only, and TI-30X and TI-36X models; an on-screen TI-30XS is also available.
85 questions in 8.5 hours is 6.0 minutes per item; a realistic first-pass target near 5.5 minutes leaves a flagged-item review buffer.
When a supplied standard is in play, search the electronic handbook or ISA PDF instead of deriving a clause from memory of a different year.
Last updated: August 2026
Why strategy is part of competency on a once-yearly CBT
The April 14, 2027 sitting is not a year-round PE you can retake in 60 days. A pacing error that burns 25 minutes on one valve-sizing alternative item type (AIT) is not just “a bad item.” It is a bid to wait until the next annual administration. The technical content still matters; the CBT rules decide whether you convert that content into a scaled score.
Most questions are traditional multiple-choice. NCEES also uses AITs . The NCEES computer-based testing page lists these common types:
AIT What you do Scoring implication
Multiple correct Select more than one listed choice The entire set must match. Two right and one wrong is incorrect .
Point-and-click Click a region on a graphic (P&ID, loop sheet, valve curve) The click is right or wrong. Nearby-but-wrong balloons score zero.
Drag-and-drop Match, sort, rank, or label One tile in the wrong slot typically zeros the item.
Fill-in-the-blank Type a numeric or short response Format matters. A correct method with the wrong decimal or omitted sign is still incorrect .
NCEES’s rule is blunt: all questions, including AITs, are scored as either correct or incorrect. There is no partial credit. Combined with the scoring process— no deductions for wrong answers —the operational rule is: answer everything . A blank fill-in-the-blank is a guaranteed zero. A guessed multiple-correct set can still be right. A guessed traditional item cannot hurt a neighboring item.
Calculators: the 2026 list, not “any scientific”
NCEES reviews the calculator list annually . For 2026 exams , the published models are the only ones allowed into the room:
- Casio: all fx-115 and fx-991 models (the model name must include fx-115 or fx-991 )
- Hewlett Packard: HP 33s and HP 35s only
- Texas Instruments: all TI-30X and TI-36X models (the model name must include TI-30X or TI-36X )
A TI-84 , TI-Nspire , HP 12C , or HP 48 is a locker item, not a workstation item. The Examinee Guide allows one approved calculator in the room without its cover; spare approved calculators and covers go with personal belongings. A TI-30XS is also available on screen . If your handheld is rejected at check-in, that on-screen TI-30XS is the remaining legal machine—not a graphing calculator in your backpack.
Confirm the list again as you approach April 2027, because NCEES restates that the list is reviewed each year. Do not discover a policy change at 7:40 a.m. in the Pearson lobby.
Pacing 85 items in 8.5 hours
Exam time is 510 minutes for 85 items:
- Plan Minutes per item Time used on 85 items Review buffer
- Even split 6.0 510 min 0 min
- First-pass target 5.5 468 min ~42 min
- Behind pace (example) 7.5 on first 40 items 300 min used, 45 items left 210 min ÷ 45 = 4.7 min/item
Worked example. You finish item 40 at 5.0 hours (300 minutes) into the exam clock. You should have been near 40 × 6 = 240 minutes on an even split, or near 40 × 5.5 = 220 minutes on a first-pass plan. You are 60–80 minutes behind . Remaining time is 210 minutes for 45 items. That is 4.7 minutes each if you never review. The recovery is not “try harder on the next SIS calculation.” The recovery is: guess, flag, move on any item that has already eaten eight minutes without a path, then use the leftover block only on flagged items that still have a handbook lookup.
The 50-minute scheduled break is for food, restroom, and resetting your eyes. It is not a secret sixth hour of exam time. If you skip it, you do not gain 50 minutes of questions.
Loading diagram... PE Control Systems first-pass loop: search, timebox, never leave a blank
Flag/guess rules that match all-or-nothing scoring
Never submit a blank. A wrong multiple-choice or a wrong AIT is the same 0 as an empty fill-in-the-blank, and empty cannot accidentally be right.
On multiple-correct, satisfy the instruction exactly. If the stem says select two, selecting three because “they all look true” is an incorrect item—not 75% credit.
On fill-in-the-blank, obey the requested format. If the stem wants a numeric Cv to two decimal places, 12 is not the same response as 12.00 when the key is format-strict. Read the unit line; do not type gpm into a blank that already includes units.
On point-and-click, zoom the graphic. A click on the adjacent balloon is a zero. The Pearson markers are for scratch work, not for changing the keyed hotspot.
When ISA-5.1 or 61511-1 is in play, search first. Deriving a 2009 balloon letter or a 61508 definition from memory is how competent engineers miss credited years. The left-pane search is slower than recall and faster than a year-long retake.
Exam-day scenario: the eight-minute valve AIT
Marcus hits a drag-and-drop on a control-valve failure mode: four tiles (air-to-open, air-to-close, fail-last, solenoid de-energize) and a sketched air-failure path. He is 70% sure of three tiles and stuck on the fourth. At minute six he is still rearranging. Expected value on an all-or-nothing AIT is ugly: extra four minutes might save one item and will steal time from later Measurement or SIS items that he can actually search . He should place the best arrangement now , flag it, and leave. After the first pass, if 20 minutes remain, he returns only if a handbook actuator table can settle the fourth tile.
Same sitting, a fill-in-the-blank orifice-plate beta ratio . Marcus can compute 0.50 but the stem asked for d/D to two decimals . He types 0.5 and moves on. If the key is 0.50 , the AIT is incorrect with no partial credit . He should have mirrored the requested precision.
Bring the handheld you actually practice on (an fx-115ES Plus or TI-36X Pro is a typical legal pair), verify it is still on the current-year list, and know the on-screen TI-30XS well enough to finish a Reynolds number if the handheld is taken. Then spend the 8.5 hours like an engineer with one annual attempt: search the supplied files, timebox at ~6 minutes, and refuse to leave zeros on the table.