| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.25 |
| Score | 0% | 65% |
Which of the following statements about solding is not true?
solder is an alloy of lead and tin |
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solder has a comparatively low melting point |
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soldering can only join metals |
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flux is used to clean surfaces before soldering |
Soldering is a process by which two or more items (typically metal) are joined together by melting a filler metal (solder) into the joint. An electrically powered soldering iron or soldering gun is used to melt the solder which is an alloy of lead and tin that has a melting point below the melting point of the items being joined. A chemical cleaning agent called flux is also used to clean the surfaces before soldering.
Which of the following saws would you use if you're cutting wood along the grain?
back saw |
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ripsaw |
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crosscut saw |
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hacksaw |
The ripsaw delivers maximum efficiency at cutting with or along the grain (ripping).
Which of the following statements about welding is not true?
a weld can often be stronger than the base materials alone |
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electric-arc welding is safer than oxyacetylene welding |
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welding is done at higher temperatures than soldering |
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no filler metal is required when welding |
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.
This tool is a(n) __________.
punch |
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screwdriver |
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awl |
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chisel |
A punch is narrow and is used to drive objects like nails (pin punch) or for making guide marks for drilling (center punch) or patterns in wood or metal.
Screwdrivers are most broadly classified by their:
width |
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length |
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tip |
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torque |
Screwdrivers come in many different handle, shaft, and tip configurations for use in a wide variety of applications. Screwdrivers are classified by their tip which is shaped to fit a corresponding screw head. Common tips are slotted (flat) and Phillips (x-shaped).