ASVAB Shop Information Practice Test 2 — Questions and Answers

Question 1: Which type of saw is best suited for making curved cuts in wood?

Circular saw
Jigsaw (Correct answer)
Miter saw
Table saw

Correct answer: Jigsaw

A jigsaw uses a narrow reciprocating blade that can pivot and follow curved lines, making it the ideal tool for cutting curves, irregular shapes, and patterns in wood and other materials.

A jigsaw (also called a sabre saw) is specifically designed for cutting curves, circles, and irregular shapes in wood, metal, plastic, and other materials. Its narrow reciprocating blade (typically 1/4 to 3/8 inch wide) can turn to follow curved cut lines that wider blades cannot follow. The jigsaw's blade moves up and down (reciprocates) while the tool is moved along the cut line. The narrow blade allows tight radius turns, making it versatile for scrollwork, pattern cutting, and cutting out sink holes in countertops. Orbital action jigsaws move the blade in an elliptical path for faster straight-line cutting, while the orbital action can be reduced for cleaner curved cuts. For comparison: circular saws make straight cuts only (designed for ripping boards or crosscutting). Miter saws (chop saws) make precise crosscuts and angled cuts but are fixed in position. Table saws excel at long straight rip cuts along the grain of boards. Other curve-cutting options include: band saws (for thicker materials and longer curves), scroll saws (for very tight, intricate curves in thinner material), and reciprocating saws (for rougher demolition work). For most shop and construction curve-cutting needs, the jigsaw is the tool of choice due to its portability and versatility.

Question 2: What is the purpose of a chamfer on a piece of wood or metal?

A chamfer is a decorative inlay cut into the surface
A chamfer is a beveled edge cut at an angle, typically 45 degrees (Correct answer)
A chamfer is a decorative groove cut along the grain
A chamfer is a rounded edge created by sanding

Correct answer: A chamfer is a beveled edge cut at an angle, typically 45 degrees

A chamfer is an angled cut, typically at 45 degrees, made along the edge or corner of a workpiece to remove the sharp corner, improve appearance, or prepare for a weld.

A chamfer is a symmetrical sloping surface cut into the corner of a workpiece, typically at a 45-degree angle. It transitions two surfaces with a flat angled surface rather than a sharp corner or a curved surface (which would be a fillet or radius). Chamfers serve multiple purposes: Safety — removing sharp corners prevents cuts and scratches. Assembly — chamfers on the end of bolts, pins, or shaft ends guide them into holes during assembly, making alignment easier. Welding preparation — chamfering the edges of plates to be welded creates a V-groove that provides better weld penetration and stronger joints. Aesthetics — chamfered edges give a finished, professional look to woodworking and machined parts. In woodworking, chamfers are cut with a router, a hand plane set at an angle, or a chamfer bit. In metalworking, a chamfering tool, countersink bit, or file creates them. A chamfer is described by its angle and width (e.g., a 45° × 3mm chamfer). A chamfer differs from a fillet (which is a concave rounded corner), a radius (convex rounded corner), and a bevel (similar to a chamfer but often at angles other than 45° and not necessarily symmetric). In technical drawings, chamfers are specified as a dimension × angle or simply as two dimensions if at 45° (e.g., C3 means a 3mm × 45° chamfer).

Question 3: What does the term 'kerf' refer to in woodworking?

The grain direction in a piece of lumber
The slot or cut made by a saw blade (Correct answer)
The measurement of wood thickness
The angle at which a saw blade is set

Correct answer: The slot or cut made by a saw blade

The kerf is the width of the slot or channel removed by a saw blade as it cuts through material. It represents the material lost to the blade during cutting.

Kerf refers to the width of the cut or slot that a saw blade makes as it passes through material. In effect, it is the width of material 'consumed' or removed by the blade during cutting. The kerf equals the width of the blade's cut path, which is typically slightly wider than the blade body itself due to the set (outward angle) of the blade's teeth. Kerf is an important consideration in precise woodworking for several reasons: Measurement accuracy — when cutting multiple pieces to length, you must account for the kerf width between cuts, or your pieces will be slightly short. For example, cutting three 12-inch pieces from a board requires: 3 × 12 inches + 2 × kerf width of total board length. Material loss — saw kerfs typically range from 1/16 inch (1.6mm) for fine-tooth hand saws to 1/8 inch (3.2mm) for most circular saw blades. When cutting many parts from sheet goods, cumulative kerf loss can be significant. In some situations, a narrow kerf is desirable (precision work, minimizing waste), while a wider kerf is preferred for other applications. Thin-kerf saw blades are available that remove less material per cut, allowing thinner blades with less resistance. The term also appears in metalworking for the slot made by a cutting torch, grinder, or saw, and in the stone and concrete industries for diamond blade cuts.

Question 4: When using a hand file, what is the correct technique to prevent 'rocking'?

Apply pressure on both the forward and backward strokes
Keep both hands on the file and apply pressure only on the forward stroke (Correct answer)
Hold the file with one hand and apply pressure only on the backstroke
Use short rapid strokes while applying constant downward pressure

Correct answer: Keep both hands on the file and apply pressure only on the forward stroke

Proper filing technique requires applying downward pressure with both hands only on the forward (cutting) stroke, then lifting or reducing pressure on the return stroke to prevent dulling the teeth and rocking the file.

Proper hand file technique is critical for efficient metal removal and a flat, smooth surface. The fundamental rule: a file cuts only on the forward (push) stroke, not on the return stroke. File teeth are angled to cut in one direction only. Correct technique: Hold the file with your dominant hand gripping the handle and your other hand at the tip to guide and control the file. Apply downward pressure with both hands on the forward stroke (pushing away from your body). On the return stroke, reduce pressure or lift the file slightly — dragging the file back under full pressure dulls the teeth rapidly and can rock the file, creating a curved rather than flat surface. To prevent 'rocking' (a common error that creates a rounded, convex surface on the workpiece): Keep the file as flat as possible throughout the stroke. Use the full length of the file for each stroke. Guide both ends of the file — if only one hand guides it, the file tends to pivot around that hand, creating a curved cut. Other filing tips: Use a file card (stiff wire brush) regularly to clear chips from the file's teeth (called 'pinning' when metal particles lodge in the grooves, which causes scratching). Cross-filing (alternating stroke directions 90° apart) helps achieve a flat surface. Draw-filing (holding the file sideways and moving it along the workpiece length) produces a smooth finish.

Question 5: What does 'TIG welding' stand for, and what distinguishes it from MIG welding?

Torch Inert Gas; TIG uses a torch, MIG uses electricity
Tungsten Inert Gas; TIG uses a non-consumable tungsten electrode, MIG uses a consumable wire electrode (Correct answer)
Total Iron Gas; TIG welds cast iron, MIG welds mild steel only
Thermal Inert Gas; TIG is hotter than MIG welding

Correct answer: Tungsten Inert Gas; TIG uses a non-consumable tungsten electrode, MIG uses a consumable wire electrode

TIG stands for Tungsten Inert Gas welding. It uses a non-consumable tungsten electrode to create the arc, with filler metal added separately if needed, while MIG welding uses a continuously fed consumable wire as both electrode and filler.

TIG (Tungsten Inert Gas) welding, formally called GTAW (Gas Tungsten Arc Welding), uses a non-consumable tungsten electrode to generate the electric arc that melts the base metal. When filler metal is needed, it's added manually as a separate filler rod held in the welder's other hand. An inert shielding gas (typically argon or helium) protects the weld pool from atmospheric contamination. MIG (Metal Inert Gas) welding, formally GMAW (Gas Metal Arc Welding), feeds a continuous consumable wire electrode through the welding gun. The wire serves as both the electrode (creating the arc) and the filler metal (melting into the weld joint). A shielding gas also protects the weld. Key differences: TIG is slower but produces higher-quality, cleaner welds with better precision. It's used for aerospace, medical, and artistic applications, and is often used on stainless steel, aluminum, and exotic alloys. MIG is faster, easier to learn, and better for production welding on steel. TIG requires both hands (one for the torch, one for filler rod) plus foot pedal control of amperage. MIG is operated one-handed, making it more accessible. Another common welding process mentioned on ASVAB is Stick welding (SMAW — Shielded Metal Arc Welding), which uses a consumable flux-coated electrode stick.

Question 6: What is the purpose of a torque wrench?

To loosen extremely tight fasteners
To tighten fasteners to a specific, measured amount of rotational force (Correct answer)
To measure the diameter of bolts and fasteners
To apply torque multiplication when tightening oversized bolts

Correct answer: To tighten fasteners to a specific, measured amount of rotational force

A torque wrench tightens fasteners to a specific, predetermined torque value (measured in foot-pounds or Newton-meters), ensuring critical fasteners are neither under-tightened (loose) nor over-tightened (stripped or broken).

A torque wrench is a precision tool designed to apply a specific, controlled amount of torque (rotational force) to fasteners. Torque is measured in foot-pounds (ft-lbs) or Newton-meters (N⋅m). When you set a torque wrench to a specified value and tighten a fastener until the wrench clicks (or signals), you know the fastener is tightened to exactly that force. Proper torque is critical for many reasons: Under-tightening — fasteners that are too loose can vibrate loose over time, leading to leaks, safety hazards, or component failure. Over-tightening — too much torque can stretch or break bolts (especially steel bolts in aluminum threads), damage gaskets, warp components, or strip threads. Engineers specify torque values for critical fasteners in vehicles, aircraft, industrial equipment, and structural applications. Common examples where torque specs are essential: cylinder head bolts (must be tightened in sequence to specific values to prevent head gasket leaks), wheel lug nuts (under-torque can cause wheels to come off; over-torque can warp brake rotors), and engine rod and main bearing cap bolts. Types of torque wrenches: Beam type (simplest — a pointer indicates torque on a scale), click type (most common — clicks and releases when target torque is reached), digital electronic (displays exact torque applied), and dial type (shows torque on a dial gauge). The click-type is most popular for automotive and mechanical work.

ASVAB Shop Information Practice Test 2

Which type of saw is best suited for making curved cuts in wood?