🔧 Hand and Power Tools

Part 1 of 7 — Shop Information on the ASVAB

What the Shop Information subtest is

Shop Information (SI) checks whether you know tools, shop terms and shop practices: which tool does which job, how a tool is used safely and correctly, and what common shop materials and fasteners are for. You do not need to be a carpenter or a welder. Most questions reward knowing the job each tool was built for.

On the paper version of the test (a few MET sites) and on the high-school CEP paper test, Auto and Shop are combined into one Auto & Shop (AS) subtest of $25$ questions. Same content, one section.

Why SI matters if it is not in the AFQT

Your AFQT (the enlistment score) uses only Arithmetic Reasoning, Math Knowledge, Word Knowledge and Paragraph Comprehension. SI matters for job qualification. Your Auto and Shop results are combined into the AS score, and AS shows up in many mechanical line scores:

• Air Force M (Mechanical) $= \text{AR} + \text{MC} + \text{AS} + 2 \cdot \text{VE}$
• Marine Corps MM (Mechanical Maintenance) $= \text{AR} + \text{MC} + \text{EI} + \text{AS}$
• Navy MEC $= \text{AR} + \text{MC} + \text{AS}$ and Navy ENG $= \text{MK} + \text{AS}$
• Army MM (Mechanical Maintenance) is a weighted blend driven mostly by AS, MC and EI

If you want a job turning wrenches, fixing aircraft, running engines or building things, SI points are worth chasing. Cutoffs vary by job and change often, so ask your recruiter about the jobs you want.

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Part 2 of 7 — Striking and Turning Tools

Hammers: match the hammer to what you are hitting

Every hammer has a face (the striking end) and something on the other end that tells you its job.

Worked example. A soldier is assembling a wooden frame with snug joints and does not want to dent the wood. The best choice is a mallet: its soft head spreads the blow.

Worked example. A metal-shop student needs to round over the end of a rivet. The rounded end of a ball-peen hammer is made for that.

Safety: Hammer faces are hardened steel. Never strike one hammer against another hammer or a hardened surface: chips of steel can fly off like shrapnel.

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Part 3 of 7 — Cutting Tools: Saws, Chisels, Files and Planes

Handsaws: which way is the grain, and what shape is the cut?

Wood has a grain: the long fibers that run the length of a board. Cutting across the grain and cutting along it are different jobs, so they get different saws.

Memory hook: you rip a sheet of paper the long way. The rip saw cuts the long way, with the grain.

Using a hacksaw

• The blade's teeth point away from the handle, so the saw cuts on the push stroke. Ease up on the return.
• Use a finer blade (more teeth per inch) for thin metal and tubing, so at least two or three teeth touch the metal at once and the teeth do not snag.

Worked example. You must shorten a $2 \times 4$ by cutting it across its width. The cut runs across the grain, so a crosscut saw is correct. If you were cutting a $1 \times 8$ board lengthwise into two narrower strips, you would rip it.

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Part 4 of 7 — Gripping, Clamping, Drilling and Finishing Tools

Pliers: grip, bend and cut

Not a wrench: pliers squeeze a nut on its corners and round them off. Use a wrench on nuts and bolts whenever one fits.

Clamps and vises: hold the work so both hands are free

Worked example. Two boards have just been glued face to face. To hold them tight while the glue dries, use C-clamps (or bar clamps for wide panels), with scrap pads so the clamp does not dent the wood.

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Part 5 of 7 — Measuring, Layout and Shop Safety

Reading a tape measure or rule to $\frac{1}{16}$ inch

Each inch on a shop rule is split into $16$ equal spaces. The length of each tick mark tells you which fraction it is:

The counting method (never fails): start at the last whole inch, count the sixteenth spaces to your mark, then reduce the fraction.

Worked example. A mark is $10$ sixteenth-spaces past the $3$-inch line. That is $3\frac{10}{16}$ inches, which reduces to $3\frac{5}{8}$ inches.

Worked example. One mark is at $2\frac{3}{8}$ in. and another at $2\frac{15}{16}$ in. How far apart are they? Convert to sixteenths: $2\frac{6}{16}$ and $2\frac{15}{16}$, so the gap is $\frac{9}{16}$ inch.

Tape tip: the hook on the end of a tape slides in and out by its own thickness, so the reading is correct whether you hook it on an edge or push it against a surface. Do not "fix" a loose hook.

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Part 6 of 7 — Shop Information Test Strategy and Traps

Your clock: about 36 seconds a question

Shop Information on the CAT-ASVAB gives you $10$ questions in $6$ minutes. That is the tightest clock per question on the whole test, but most SI questions are recognition: you either know the tool or you can reason to it fast.

• Aim to answer a picture or "which tool" question in 10 to 20 seconds. That banks time for the occasional reading-heavy question.
• The timer and the number of questions left show in the lower-right corner of the screen.
• You cannot skip ahead or go back. You must answer each question to move on, so decide and commit.
• Some questions may be unscored tryout items, and you cannot tell which. Treat every question as if it counts.
• If time is running out, keep reading and answering for real. The CAT penalizes a string of wrong answers at the end of a subtest heavily, so random clicking hurts more than it helps.

A three-step routine for "which tool" questions

1. Find the verb. Is the job to drive, turn, cut, hold, bore, smooth or measure? That names the family.
2. Find the material and shape. Wood or metal? Straight cut or curve? Round pipe or a hex nut? With or across the grain?
3. Pick the tool built for it. Several tools could do the job badly. The answer is the one designed for it.

Worked example. "Which tool is best for cutting a curve in a piece of $\frac{1}{4}$-inch plywood?" Verb: cut. Material and shape: thin wood, curve. Built for it: coping saw (or a jigsaw if power tools are listed). A hacksaw could scratch its way through, but it is designed for metal.

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Part 7 of 7 — Hand and Power Tools Mastery Set

This set mixes every tool family the way the real subtest does: some picture questions, some "best tool for the job," some correct-practice and safety questions, and one measuring question.

Pace yourself like test day: about 36 seconds per question. Use the routine from Part 6: verb → material and shape → the tool designed for it.