OAR Mechanical Review 2025/2026 – Full A+ Exam Q&A | Simple Machines, Circuits, Fluid Pressure, Newton's Laws & Power Systems

This in-depth OAR Mechanical Review for 2025/2026 is a fully solved and highly rated collection of questions and answers designed to prepare candidates for the Officer Aptitude Rating (OAR) Mechanical Comprehension section. It provides a comprehensive walkthrough of all critical concepts expected on the exam, blending physics theory with real-world military and mechanical applications. Key areas of focus include: Work, Force & Power: Work = Force x Distance, Horsepower, Joule’s Law, power in mechanical and electrical systems Newtonian Mechanics: Newton’s 1st, 2nd, and 3rd Laws, inertia, acceleration, force relationships Simple Machines: Lever classes (1st, 2nd, 3rd), mechanical advantage, torque, inclined planes, wedges, screws, pulleys, wheel and axle systems Fluid Mechanics: Bernoulli’s Principle, Pascal’s Law, pressure (Force/Area), buoyancy, density, specific gravity Electrical Concepts: Ohm’s Law (V = IR), series vs. parallel circuits, current and voltage distribution, capacitors, resistors, diodes, inductors Heat Transfer & Thermodynamics: Conduction, convection, radiation, rate of heat exchange Rotational Motion & Gears: Gear teeth/revolutions formulas, pendulum motion, velocity equations This resource is highly recommended for: Applicants to Navy, Marine Corps, and Coast Guard OCS programs Aviation candidates and engineering-focused military roles STEM students needing a practical mechanical reasoning guide Tutors and educators preparing students for military aptitude assessments The document uses a structured, flashcard-like format with precise definitions, formulas, and real-world examples. It simplifies complex theories into digestible Q&A for exam mastery and quick retention. Keywords: OAR mechanical review, mechanical comprehension, Newton’s laws, simple machines, gear systems, torque, Ohm’s Law, Bernoulli’s Principle, pulleys and levers, inclined planes, electrical circuits, specific gravity, fluid pressure, military aptitude test, Navy OAR