Shop Information Study Guide for McGraw-Hill's ASVAB
Practice problems for this study guide can be found at:
The shop information questions that appear on the ASVAB measure how much you understand about shop tools, practices, materials, and procedures. The questions may ask you to identify a particular shop tool, to tell how it is used, or to choose the correct procedure when working with wood, metal, or construction materials. If you took shop courses in high school, or if you have done any woodworking or metalworking on your own, you may already be familiar with many of the topics covered on the test. You may also have learned shop and construction tools and procedures on the job.
On the paper-and-pencil version of the ASVAB, shop questions are one part of the Auto and Shop Information test. On the CAT-ASVAB, they form a separate test of their own.
Whichever ASVAB version you take, you'll have only about half a minute to answer each shop information question, so you'll have to work fast if you want to get a good score. That's why it pays to spend time studying the test topics and tackling plenty of sample ASVAB shop information questions.
The topic review that follows will help prepare you to answer ASVAB shop information questions. It lists and describes the different tools you should know, with an emphasis on traditional hand tools. It also covers common fasteners and materials. There is also important information about tool safety.
Measurement and Layout
New projects and many repairs start with measurement and layout. This is where you amass the proper tools and materials, and mark out the cutting and drilling.
Carpenters usually use a tape measure, marked in 1/16-inch increments. The tape retracts automatically into the case, but locks in place when it must be extended for a while. The tape has a hook on the end that moves slightly for accurate inside and outside measurements. Retractable tape measures range from 6 feet to 25 feet long.
When greater accuracy is needed, machinists use a rigid steel rule. These rules are often marked in 1/32- or 1/64-inch increments and are often 1 foot long. A metric steel rule would usually be marked in 1-millimeter increments.
When even greater accuracy is needed, machinists use calipers or micrometers. Some calipers are simply two legs that can transfer a measurement to a steel rule. These calipers can take inside or outside measurements, depending on the shape of the legs. Calipers can also have straight legs.
The Vernier caliper is even more accurate, thanks to the clever Vernier system. First identify the Vernier scale and the main scale. Now look at the "0" on the Vernier scale (see Figure S-3). This is just past the third mark on the main scale, indicating 3 millimeters (mm) on this metric caliper. So the measurement is a bit more than 3 mm, but how much more? Notice that line 3 on the Vernier scale lines up with a line on the main scale. That means that you should add 0.3 mm to the measurement, making a total of 3.3 mm. (Only one mark on the Vernier scale will line up with the main scale, and it doesn't matter which line it lines up with. Remember, read the number on the Vernier scale to get the right-hand digit in the measurement.)
Micrometers are even more accurate than Vernier calipers, but they are usually designed to read only in a certain range, say up to 1 inch, or 1 inch to 2 inches. Unlike a Vernier caliper, where you slide the adjuster, you turn a screw on a micrometer.
Layout often calls for square (90°) lines. A carpenter's square is used to draw these lines: When you hold one leg against the edge of a board, the second makes a square line across the board. A smaller version is called the try square.
You may also see a sliding bevel, which has a metal leg fastened to a wooden block. By loosening the adjustment screw, you can set the tool to mark almost any angle. Sliding bevels can be used to transfer angles from place to place.
The easiest way to tell if something is level (horizontal) or vertical (plumb) is with a level, sometimes called a spirit level. Levels use glass or plastic tubes that are curved or slightly swollen in the middle. When the bubble in the liquid (spirit) is centered, the level is horizontal or vertical.
Washington Virtual Academies
Tuition-free online school for Washington students.
- Coats and Car Seats: A Lethal Combination?
- Kindergarten Sight Words List
- Signs Your Child Might Have Asperger's Syndrome
- Child Development Theories
- 10 Fun Activities for Children with Autism
- Social Cognitive Theory
- Why is Play Important? Social and Emotional Development, Physical Development, Creative Development
- GED Math Practice Test 1
- Problems With Standardized Testing
- The Homework Debate