Shop Information Practice Test 6 for the ASVAB

Answer: C

Correct answer: It makes scribed lines easy to see against a contrasting background. Layout dye gives the metal a colored coating. A scriber scratches through it, leaving a thin bright line that stands out clearly against the dark background.

• A: Rust protection is not the dye's job; aluminum also does not rust like steel.
• B: Layout dye is a marking aid, not a cutting fluid.
• C (correct): The scriber cuts through the colored film, so the bright metal line shows up sharply.
• D: The dye is a thin coloring film and does not change the hardness of the metal.

Answer: C

Correct answer: The drive style in the head. These names identify the drive recess, which determines the tool that turns the screw. They say nothing about the thread or the material the screw is made to fasten.

• A: Pitch is given as a distance (mm) or as threads per inch, not by a drive name.
• B: Strength is shown by grade or property class markings, not by the drive recess.
• C (correct): Phillips, Torx and slotted name the shape of the recess that the driver fits into.
• D: The same drive recess appears on both wood screws and machine screws.

Answer: C

Correct answer: It helps resist unintended rolling under an appropriate setup. Wheel chocks are wedges placed against the tires that stay on the ground, usually on the end opposite the one being lifted. When one end of a vehicle goes up, the remaining wheels can roll, and the vehicle can slide off the jack or stands. Chocks hold the vehicle in place along with the parking brake and the transmission in Park or in gear. They do not hold up any weight, so rated stands are still needed under the raised end.

• A: Incorrect: A wedge is not a calibration device.
• B: Incorrect: Chocks do not support a raised axle; rated stands do.
• C (correct): Correct: Chocks are one control in a larger support and immobilization strategy.
• D: Incorrect: Immobilization uses multiple appropriate measures together.

Answer: D

Correct answer: 3 g/cm³. Density is mass divided by volume, so 480 g ÷ 160 cm³ = 3 g/cm³. A quick check is that

The units also guide you: grams over cubic centimeters means mass goes on top. Flipping the ratio gives about 0.33, which would mean the sample is lighter than water, while multiplying or adding the numbers produces meaningless units. A density of 3 g/cm³ is a little more than that of aluminum.

• A: Multiplying the values is not how density is calculated.
• B: This reverses the density ratio and gives volume divided by mass.
• C: Adding mass and volume does not yield a meaningful density.
• D (correct): The calculation is 480 divided by 160, giving 3 grams per cubic centimeter.

Answer: D

Correct answer: 0.050 inch. Teeth per inch (TPI) and tooth spacing are reciprocals. If 20 teeth fill one inch, each tooth interval is

The same idea works in reverse: a 0.10-inch spacing would mean 10 TPI. Watch decimal place values, since 0.005 is ten times smaller. Higher TPI means smaller, closer teeth, which suit thin or hard material, while lower TPI suits thicker stock.

• A: This confuses the number of teeth with a length measurement.
• B: This is ten times smaller than the one-in-twenty-inch spacing.
• C: A 0.20-inch spacing would correspond to only 5 teeth per inch, not 20.
• D (correct): One inch divided by 20 tooth intervals gives approximately 0.050 inch per interval.

Answer: C

Correct answer: 29.9 mm. A bilateral tolerance of ±0.2 mm lets the size vary up to 0.2 mm above or below the nominal 30.0 mm. Find the limits by adding and subtracting: the upper limit is 30.2 mm and the lower limit is 29.8 mm, and any measurement from 29.8 through 30.2 mm is acceptable. Only 29.9 mm falls inside that band. The tempting error is checking one side only, for example confirming that a size is above 29.8 mm while forgetting the upper limit.

• A: This exceeds the allowed positive deviation by more than the stated tolerance.
• B: This size exceeds the upper limit of 30.2 mm. The largest acceptable value is 30.2 mm under this bilateral tolerance.
• C (correct): The inclusive nominal bounds are 29.8 and 30.2 mm, so 29.9 mm falls inside.
• D: This size is below the lower limit of 29.8 mm. The smallest acceptable value is 29.8 mm under this bilateral tolerance.

Answer: D

Correct answer: C-clamp. A C-clamp has a C-shaped frame and a threaded screw with a swivel pad. Turning the screw squeezes the work against the frame, holding parts together for gluing, welding or drilling. The three distractors are all measuring tools: a caliper and a micrometer measure dimensions, and a steel rule measures and lays out lengths. Recognize this type of question by its verb: holding or securing points to a clamp or vise, while measuring points to a gauge or rule.

• A: A caliper measures linear dimensions.
• B: A micrometer measures a dimension precisely.
• C: A steel rule measures or lays out lengths.
• D (correct): A screw clamp provides controlled compressive holding force.

Answer: C

Correct answer: A groove across the face grain. A dado is a square-sided groove cut across the grain of a board, typically sized so a shelf or panel fits snugly into it. Because the shelf sits in the groove, the joint supports weight better than a simple butt joint with screws alone. A similar groove running with the grain is usually called a groove or plow. A countersink, spindle and external thread are unrelated features, not joint shapes.

• A: A conical screw-head recess is a countersink, not a dado.
• B: A spindle is a turned cylindrical part, not a groove in a panel.
• C (correct): A dado is commonly a cross-grain groove used to receive another member, such as a shelf.
• D: External threads are manufactured on a rod or fastener, not described as a dado.

Answer: A

Correct answer: Switch the parts-washing process to the water-based cleaner. Rank controls from most to least effective: elimination, substitution, engineering controls, administrative controls, then PPE. Replacing the solvent with a less hazardous cleaner that works equally well is substitution, so it outranks the exhaust hood (engineering), signs and time limits (administrative) and respirators (PPE).

• A (correct): Substitution replaces the hazardous material with a less hazardous one, which ranks above engineering, administrative and PPE controls.
• B: Source capture is a strong engineering control, but it still leaves the flammable solvent in use, so it ranks below substitution.
• C: Respirators are PPE, the last line of defense, and they protect only the wearer while the vapor hazard remains.
• D: Signs and time limits are administrative controls that depend on people following rules; they do not change the hazard.

Answer: B

Correct answer: Bolts with insulating washers or coatings. Two requirements decide this: the guard must be removable, which points to threaded fasteners, and dissimilar metals in damp conditions call for a corrosion strategy such as insulating washers or coatings.

• A: Welding makes the guard permanent and aluminum is not routinely fusion welded to a steel frame.
• B (correct): Bolts allow regular removal, and isolation reduces galvanic corrosion between aluminum and steel in damp conditions.
• C: A cured adhesive is not designed for monthly nondestructive removal.
• D: Rivets must be drilled out to remove the guard, and bare steel in aluminum invites corrosion.