ASVAB Mechanical Comprehension practice questions.
Mechanical principles, simple machines, physics intuition.
This page has 3 free ASVAB Mechanical Comprehension (MC) practice questions, each with a worked explanation. Mechanical Comprehension (MC) is a technical subtest used for line-score composites. Mechanical principles, simple machines, physics intuition. These 3 items are part of the calibration sample (v0) — they are practice questions, not a full-length ASVAB practice test. Each item carries three pre-generated explanation phrasings; the runtime serves a deterministic rotation to keep cost flat. AI-explained answer (verified by reviewer queue).
Which simple machine is a doorknob most similar to?
Where this score goes
Which line scores MC moves.
Your Mechanical Comprehension standard score feeds 15 published line-score composites across 6 branches, and does not count toward the AFQT. Each branch below publishes its own formulas — the codes are the ones whose formula consumes MC.
- Army ASVAB score requirements — 6 of 10 named composites: CO, FA, MM, OF, SC, ST · verified 2026-08-02 against officialasvab.com (DoD ASVAB Program — Military Jobs composite table)
- Navy ASVAB score requirements — 2 of 9 named composites: MEC, NUC · verified 2026-08-02 against officialasvab.com (DoD ASVAB Program — Military Jobs composite table)
- Marines ASVAB score requirements — 2 of 4 named composites: GT, MM · verified 2026-08-02 against officialasvab.com (DoD ASVAB Program — Military Jobs composite table)
- Air Force ASVAB score requirements — 1 of 4 named composites: M · verified 2026-08-02 against officialasvab.com (DoD ASVAB Program — Military Jobs composite table)
- Space Force ASVAB score requirements — 1 of 4 named composites: M · verified 2026-07-23 against airforce.com (ASVAB and Air Force composites)
- Coast Guard ASVAB score requirements — 3 of 7 published rating combinations: VE+MC+AS, AR+MC+AS, AR+MC+AS+EI · verified 2026-08-02 against COMDTINST M1500.10C, Enclosure (3) — Rating Requirements
Put real numbers through the formulas with the ASVAB line score calculator, check your percentile with the AFQT calculator, estimate where practice performance lands with the ASVAB score predictor, or compare every branch’s published minimums on the branch ASVAB requirements index.
Independent test-prep — not affiliated with DoD or the ASVAB program. See officialasvab.com for the test program.