40 simulator scenarios mapped to the CCST exam blueprint, plus a 30-question timed mock exam with a per-domain score breakdown. Practise the troubleshooting, safety, and loop work the exam actually tests — in your browser.
Independent prep tool — not affiliated with or endorsed by ISA. Completing this prep does not award the CCST credential.
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The credential
The Certified Control Systems Technician (CCST) is a professional certification from ISA — the International Society of Automation — for technicians who calibrate, maintain, and troubleshoot industrial measurement and control systems. It is one of the most widely recognised credentials for instrumentation and controls technicians, and many employers in process and manufacturing industries treat it as a hiring signal.
Per ISA’s published exam information, the CCST Level 1 exam runs 150 questions over four hours. The exam is administered by ISA, and only ISA awards the credential — confirm current requirements and exam specifications directly on isa.org before you book.
Why hands-on
The exam covers calibration, loop checking, and troubleshooting — skills you demonstrate by doing, not by recognising the right multiple-choice option. Flashcards train recall; the exam rewards diagnosis.
Every scenario drops you into a working simulation — a timer that never resets, a swapped NO/NC contact, a drive that won’t enable — and you fix it. That is the muscle the exam (and the job) actually uses.
Each scenario is graded against a test suite, so you know whether your fix actually works. No grading yourself against an answer key and hoping you were honest.
Blueprint mapping
The pack organises its 40 hands-on scenarios into the six domains below. Your mock exam results are broken down by the same domains, so you can see exactly where to focus before exam day.
XIC/XIO contacts, seal-in circuits, TON/TOF timers, CTU counters, SET/RESET coils, one-shot edges, integer comparison, and forward/reverse interlocking.
Diagnose NO/NC swaps, wrong I/O addresses, timers that never reset, missing seal-ins, scan-order race conditions, forced I/O risks, and intermittent output faults.
E-stop circuit basics, two-hand control, light curtain muting, safety category levels (Cat 3 / PLd), and lockout/tagout PLC interlocks.
Drive enable/ready handshakes, speed reference scaling, servo home sequences, drive fault handling, and encoder position comparison.
Tag binding, alarm state propagation, auto/manual mode selectors, alarm acknowledge/clear workflows, and recipe download simulation.
Reading rung descriptions, interpreting I/O lists, program comment standards, revision tracking, and turning a functional description into working ladder.
Sample questions
These illustrate the style and topic mix of the CCST — current-loop scaling, instrumentation reasoning, and fail-safe wiring. They are practice items written to match the exam’s topic areas; they are not real ISA exam questions, and only ISA administers the actual exam.
Answer: 50 psi. 4 mA = 0 psi and 20 mA = 100 psi, so the span is 16 mA over 100 psi. 12 mA is the midpoint (12 − 4 = 8 mA, half of the 16 mA span), giving 50 psi.
Answer: A live-zero (4 mA) lets the system distinguish a true zero reading from a broken wire (0 mA = fault), and a current loop is unaffected by voltage drop across long cable, so the signal does not degrade with distance.
Answer: The rung opens and the machine stops. A broken wire looks the same as a pressed Stop, so the design fails safe — the reason Stop and E-stop inputs are wired normally-closed.
Mock exam
The timed mock exam draws 30 scenarios at random from the 40-scenario pool and puts you on a 90-minute clock. When you submit, you get an overall score out of 100 plus a blueprint coverage breakdown — your pass rate in each of the six domains — so weak areas are obvious, not guessed at.
Pricing
The CCST cert-prep pack is a one-time $99 purchase, not a subscription. Buy it on any account — including the free tier — and you keep access. If you already subscribe to Pro or Teams, every cert-prep pack is included in your plan at no extra cost.
Hands-on, auto-graded simulator scenarios across all six CCST blueprint domains, with progress tracked per scenario.
30 questions, 90 minutes, retakable. Scored results with a per-domain blueprint coverage breakdown after every attempt.
Pay once and prep at your own pace. No monthly billing, no expiry on the pack. (To be clear: the pack does not award the CCST credential — only ISA does.)
If your goal is landing a role rather than the CCST credential, the interview tracks cover timed Q&A and live-coding rounds by seniority level.
See PLC interview prep →If the blueprint domains above feel unfamiliar, start with the structured training path — lessons, quizzes, and beginner scenarios — before tackling cert prep.
See PLC training →Create a free account, try the simulator, then unlock the full CCST pack when you’re ready.
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