| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.14 |
| Score | 0% | 63% |
A joint created by welding is __________ the original metal.
as strong or slightly weaker than |
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as strong or stronger than |
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harmful to |
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weaker than |
The joint created by welding is as strong or stronger than the original metal.
Which of the following saws would you use if you're cutting wood across the grain?
crosscut saw |
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ripsaw |
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back saw |
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hacksaw |
Wood saws are categorized by their teeth shape and the number of teeth per inch (TPI). The higher the TPI of a saw the finer the cut it will make. Crosscut saws utilize knife-shaped teeth that cut across the grain of the wood while rip saws cut with the grain using chisel-shaped teeth that rip the wood cells apart as the cut is made. The kerf (slot) made by by a crosscut saw is much smoother than that made by a rip saw but a rip saw cuts much faster. Coping saws are a type of bow saw used to make detailed often curving cuts using replaceable blades with fine small teeth.
This tool is a(n) __________.
outside micrometer |
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inside caliper |
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outside caliper |
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vernier caliper |
Calipers are similar to micrometers in shape but instead of measuring distances, calipers are used to transfer distances between objects. An outside caliper is used to transfer outside dimensions while an inside caliper is used to transfer inside distances. A vernier caliper is an extremely precise caliper (down to \({1 \over 1000}\) inch) that allows measuring / transferring either inside or outside dimensions.
Which of the following is the primary difference between pliers and pincers?
pincers squeeze, pliers cut or pull |
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pliers are designed for large objects, pincers are designed for small objects |
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pincers are designed for large objects, pliers are designed for small objects |
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pliers squeeze, pincers cut or pull |
Pincers provide a mechanical advantage that's used to cut, pinch or pull an object. The force applied to pincers is concentrated to a point or to an edge of the tool which allows pincers to be brought very close to a surface. Pincers are typically used for removing objects from a material to which they've previously been applied, for example, to pull nails from wood.
Which of the following statements about welding is not true?
electric-arc welding is safer than oxyacetylene welding |
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no filler metal is required when welding |
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a weld can often be stronger than the base materials alone |
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welding is done at higher temperatures than soldering |
Welding is a high-temperature process that involves melting the base metals in the objects to be joined to fuse them together. A filler metal is used to provide additional material to make up a joint that, depending on the weld type, can be stronger than the base materials alone. Oxyacetylene welding is a welding process that uses a torch fueled with oxygen and acetylene gases. Electric-arc welding utlizes electric current in a safer welding process (it doesn't involve burning explosive gases) that enables a wide variety of specialized applications like stick, MIG (metal inert gas), and TIG (tungsten inert gas) welding.