ASVAB practice tests and lessons

General Science (GS)

• General Science

  Explain the mechanism behind the observation, use quantitative evidence when supplied, and avoid conclusions broader than the model.

• General Science: Earth and Space Science

  Connect atmospheric, oceanic, geologic and astronomical observations through mechanisms rather than memorized associations.

• General Science: Physical Science

  Use particles, forces, energy and measurements to distinguish what stays constant from what changes.

• General Science: Life Science

  Interpret living systems through controlled evidence, information flow and interactions across levels of organization.

Arithmetic Reasoning (AR)

• Arithmetic Reasoning

  Translate a demanding word problem into a model, solve only for what is asked, and check the physical meaning.

• Arithmetic Reasoning: Rates, time, and distance

  Model unequal travel times, changing routes and moving targets with one consistent clock.

• Arithmetic Reasoning: Ratios and proportions

  Preserve the meaning of each ratio part, and distinguish a scale factor from an added amount.

• Arithmetic Reasoning: Averages and totals

  Convert averages into totals before combining, removing or replacing observations.

• Arithmetic Reasoning: Work and mixtures

  Use additive rates and conservation of material, then change equations when conditions change.

Explore 2 more lessons in this subject in the student workspace.

Word Knowledge (WK)

• Word Knowledge

  Use context, word structure and precise substitution to distinguish true synonyms from merely associated ideas.

• Word Knowledge: Synonym (word in isolation)

  Distinguish precise meanings, grammatical roles and common false friends in demanding vocabulary.

• Word Knowledge: Word in sentence context

  Use the passage’s logical relationship to select the intended sense and degree, especially when several choices are related.

Paragraph Comprehension (PC)

• Paragraph Comprehension

  Choose an answer supported by the whole passage, preserving conditions, sequence and the author’s degree of certainty.

• Paragraph Comprehension: Main idea

  Summarize the passage’s organizing claim and explain why examples and qualifications were included.

• Paragraph Comprehension: Stated details

  Reconstruct conditions, quantities and process order without substituting a plausible but unstated procedure.

• Paragraph Comprehension: Inference and conclusion

  Infer only what follows from the evidence, and distinguish a plausible explanation from an established cause.

• Paragraph Comprehension: Word meaning in context

  Interpret a word or phrase through its role in the whole passage, including contrast and degree.

Mathematics Knowledge (MK)

• Mathematics Knowledge

  Choose transformations that preserve the problem’s domain and distinguish the quantity asked from an intermediate result.

• Mathematics Knowledge: Number and operations

  Control signs, powers, radicals and units without relying on decimal approximations.

• Mathematics Knowledge: Algebra

  Use equivalent transformations, preserve restrictions, and check candidate solutions in the original statement.

• Mathematics Knowledge: Geometry

  Translate a verbal diagram into fixed lengths and relationships; distinguish area, boundary and three-dimensional surface.

Electronics Information (EI)

• Electronics Information

  Read the connected circuit, select the relevant electrical relationship, and distinguish a test indication from a justified conclusion.

• Electronics Information: Circuits and components

  Read the symbol and its connections, then reason about stored charge, switching paths and component behavior.

• Electronics Information: Electrical principles

  Combine electrical laws with network structure and the actual operating conditions of each component.

• Electronics Information: Electrical systems and safety

  Interpret references, source waveforms and measurements without confusing an indicated value with proof of a safe or sound system.

Auto Information (AI)

• Auto Information

  Use system function and controlled observations to localize a problem, then check that the conclusion fits every supplied measurement.

• Auto Information: Electrical and charging

  Use loaded voltage and actual current paths to distinguish source, connection, control and component problems.

• Auto Information: Engine systems

  Follow the four-stroke cycle and distinguish combustion, breathing, lubrication, cooling and emissions functions.

• Auto Information: Brakes, steering, and suspension

  Relate a measured force, motion or alignment change to the component actually responsible for it.

• Auto Information: Drivetrain and transmission

  Trace torque and relative rotation through clutches, ratios, differentials and axle connections.

Shop Information (SI)

• Shop Information

  Choose a tool from task constraints, interpret measurements with units and error models, and follow every condition of the stated procedure.

• Shop Information: Hand tools

  Choose the working geometry and load path suitable for the task, not merely a tool with a familiar name.

• Shop Information: Fasteners and hardware

  Match joint geometry, material behavior and mixing or threading rules to the specified service requirement.

• Shop Information: Power tools

  Use cutting geometry, tool ratings and controlled measurement conditions to select and evaluate a powered setup.

• Shop Information: Measuring and shop procedures

  Distinguish accuracy, repeatability and material properties, and apply the stated procedure to the actual interface being checked.

Mechanical Comprehension (MC)

• Mechanical Comprehension

  Select the governing principle before calculating: force balance, work, fluid volume or momentum.

• Mechanical Comprehension: Simple machines

  Compare force advantage, motion ratios and direction by tracing the actual machine rather than counting visible parts.

• Mechanical Comprehension: Fluids and pressure

  Apply pressure, volume conservation and buoyancy to a clearly defined fluid or displaced region.

• Mechanical Comprehension: Work, energy, and power

  Keep energy amounts, power rates and efficiency fractions distinct across each stage of a machine.

• Mechanical Comprehension: Forces and motion

  Use net force, contact limits, moments and momentum with an explicit choice of direction and system.

Assembling Objects (AO)

• Assembling Objects

  Use invariant relationships and complete fits to solve spatial tasks, with reflections allowed only when the prompt says so.

• Assembling Objects: Connection items

  Track two fixed attachment identities through independent rotations, reflections and hidden crossings.

• Assembling Objects: Puzzle items

  Build a complete geometric fit; equal area and a plausible first piece do not establish a valid assembly.