12 timed quizzes across fundamentals, timers, state machines, safety, and PID. Multiple-choice, true/false, and ladder-trace questions — all objectively graded.
Every quiz is timed, graded against a published pass threshold, and stored in your progress record. You either know the material or you don’t — and you’ll know which.
Every quiz runs against a clock. 3–15 minutes per set — the same pressure you feel sitting across from a hiring manager.
Multiple-choice for concepts, true/false for traps, ladder-trace for execution logic. Explanations on every answer.
Take a quiz before you start a topic, then again after. The delta is what you actually learned.
Pass the topic quizzes first; the interview tracks reuse them as their Q&A rounds.
Titles, time limits, and pass thresholds are public. Questions and answer keys stay behind sign-in.
Scan cycle, IO model, ladder basics.
On-delay, off-delay, and up/down counters.
NO/NC contacts, coil types, series vs parallel, and fall-through semantics.
Binary, decimal, hexadecimal, BCD, signed vs unsigned, and PLC bit addressing.
E-stop wiring, stop-priority rungs, dual-channel safety, and fail-safe logic principles.
State-as-coil patterns, one-shots, state transitions, and sequencer logic in ladder programs.
Sequential Function Chart steps, transitions, action qualifiers, and parallel branches per IEC 61131-3.
IF/THEN/ELSE, CASE statements, variable declarations, assignments, and ST syntax per IEC 61131-3.
Proportional, integral, and derivative terms; tuning methods; integral windup; and deadtime compensation.
4-20mA and 0-10V signals, analog-to-digital conversion, scaling to engineering units, and wiring practices.
PLC scan-cycle traps, mid-scan input readback, watchdog timers, and systematic fault-finding techniques.
Modbus RTU/TCP, EtherNet/IP, Profinet, register types, and industrial network fundamentals.
The trace questions hand you a rung and ask what the output is. The MCQs expose the distractor your brain would actually pick. Every question comes with an explanation you’ll remember.
Sign up free and take the first quiz — you’ll learn more from the explanations than from most PLC tutorials.