ASVAB Shop Information Practice Test

Answer: B

Correct answer: To keep hands farther from the blade while controlling the work. On narrow rip cuts, a hand pushing the board would come close to the blade. A push stick or push block lets the operator keep control of the workpiece while holding the hand a safer distance away, and it supplements, rather than replaces, the blade guard.

• A: A push stick works together with the guard; it does not replace it.
• B (correct): A push stick lets the operator guide the board while keeping fingers out of the hazardous blade region.
• C: Its purpose is hand protection and control, not faster feeding.
• D: Setting the cut width is the job of the fence, not the push stick.

Answer: B

Correct answer: Dovetail joint. Picture how the parts fit: tapered tails sliding between tapered pins and locking sideways is a dovetail. A tenon entering a socket would be a mortise-and-tenon, and a plain end against a face would be a butt joint.

• A: In its simple form a butt joint has no interlocking shapes; the pieces only meet face to face.
• B (correct): Tapered tails interlocking with pins are the defining feature of a dovetail, which resists the pieces being pulled apart in one direction.
• C: A rabbet is an L-shaped step cut along an edge or end, not a set of tapered interlocking tails.
• D: A mortise-and-tenon uses a single projecting tenon that slides into a cavity, not a row of tapered tails and pins.

Answer: C

Correct answer: 12.66 mm. Find both limits:

Any measurement from 12.67 to 12.73 mm passes; 12.66 mm falls below the lower limit.

• A: 12.67 mm is exactly the lower limit, so it is still acceptable.
• B: 12.72 mm lies between 12.67 mm and 12.73 mm, so it is within tolerance.
• C (correct): The lower limit is 12.70 - 0.03 = 12.67 mm, and 12.66 mm is below it.
• D: 12.73 mm is exactly the upper limit, so it is still acceptable.

Answer: A

Correct answer: Counterbore. Match the recess to the head shape. A cylindrical socket head needs a cylindrical counterbore; a conical flat head needs a countersink. A spotface just gives a shallow flat seating surface.

• A (correct): A counterbore is a flat-bottomed cylindrical recess that lets a cylindrical screw head sit below the surface.
• B: A countersink is conical and suits a flat-head screw, not a cylindrical socket head.
• C: A spotface is only a shallow flat seat; it is not deep enough to hide the head.
• D: A chamfer is a small bevel on an edge and gives no recess for a screw head.

Answer: D

Correct answer: Assess his noise exposure and provide hearing protection selected for the task. Noise hazard depends on sound level and exposure time, not on personal comfort. Ordinary earbuds are not a replacement for task-selected earplugs or earmuffs, so the right approach is an exposure assessment, properly fitted hearing protection where required and following the employer's hearing program.

• A: Consumer earbuds are not validated hearing protection and may even add sound of their own to the ear.
• B: How tolerable a noise feels does not show whether the exposure is hazardous; level and duration matter.
• C: Louder music adds sound energy to the ear and increases total noise exposure.
• D (correct): Hearing risk depends on sound level and duration, so exposure should be measured and suitable occupational hearing protection used where required.

Answer: B

Correct answer: 14.3 mm. Convert the fraction to a decimal,

then multiply by 25.4:

or about 14.3 mm.

• A: This divides by 25.4 instead of multiplying; to go from inches to millimeters you multiply.
• B (correct): Multiplying 0.5625 in by 25.4 mm per inch gives 14.2875 mm, which rounds to 14.3 mm.
• C: This divides 25.4 by 0.5625, which is not a valid conversion.
• D: This rounds to the nearest common metric wrench size; the true value is 14.3 mm, so a 14 mm wrench is not the same size.

Answer: D

Correct answer: Remove the hammer from use until the handle is repaired or replaced. A hammer head must be tight on a handle free of cracks and splinters. A loose head can release under impact, so take the hammer out of service rather than trying to work around the defect.

• A: Holding the hammer differently does not keep a loose head from releasing.
• B: Even light blows can work a loose head free and send it flying.
• C: Tape is not a proper repair; the head must be tight on a sound handle.
• D (correct): A loose head can fly off under impact, so the tool must not be used in that condition.

Answer: D

Correct answer: The fluid absorbs moisture from the air, which lowers its boiling point. Brake fluid absorbs moisture from the air. That water lowers its boiling point, so keep the container sealed and use only the type listed on the reservoir cap.

• A: Brake fluid does not flash off quickly; the main concern with an open container is moisture absorption.
• B: Exposure to air does not thicken brake fluid; the problem is the water it absorbs.
• C: Carbon monoxide comes from engine exhaust, not from brake fluid in a container.
• D (correct): Water picked up from the air lets the fluid boil at a lower temperature under hard braking, reducing braking performance.

Answer: B

Two hazards are present: chips wrapped on a rotating bit and a workpiece held only by hand. The safe fix is to stop the machine and wait for rotation to end, remove chips with a proper tool, and secure the work in a vise or with clamps before drilling again.

• A: A glove near a rotating bit can be caught and pull the hand in, and sharp chips can cut through it.
• B (correct): Stopping prevents contact with the rotating bit, a tool keeps hands off sharp chips, and clamping keeps the plate from spinning.
• C: Reaching toward a running bit with bare hands exposes them to sharp, hot chips and the rotating tool.
• D: This leaves the drill running and blows sharp chips into the air toward the worker and others.

Answer: C

Correct answer: 0.75%. Average the readings:

The error is

Divide by the reference value and multiply by 100%:

• A: This reports the 0.30-mm absolute error as if it were already a percentage.
• B: This misplaces the decimal point when converting 0.0075 to a percent.
• C (correct): The mean of 40.30 mm is 0.30 mm high, and 0.30 divided by 40.00 is 0.0075, or 0.75%.
• D: This shifts the decimal the other way, dividing the percent by ten.