| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.01 |
| Score | 0% | 60% |
Which of the following would be used to make a drilling guide mark in a sheet of metal?
pin punch |
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center punch |
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screwdriver |
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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.
Measuring tools provide a convenient and easy way to compare object dimensions against:
perfection |
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a drawing |
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each other |
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a standard |
Measuring tools give easy access to the wide variety of standard dimensions that are used to categorize and classify objects.
Which of the following nuts provide appendages that allow tightening and loosening by hand?
slotted |
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wing |
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cotter |
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lock |
Wrenches are used with threaded fasteners like bolts and nuts. A bolt has external threads while a nut has internal threads and this thread pattern combination allows them to lock together and act as fasteners. Nuts come in a variety of configurations including wing nuts which provide appendages that allow tightening and loosening by hand, slotted nuts that use a cotter pin to lock the nut in place and prevent it from loosening, and lock nuts that also prevent loosening via nylon in their threads. Threads are identified by pitch which is the number of threads per inch.
Which of the following statements about solding is not true?
flux is used to clean surfaces before soldering |
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soldering can only join metals |
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solder has a comparatively low melting point |
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solder is an alloy of lead and tin |
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.
A joint created by soldering is:
as strong as a weld |
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as strong as the original metal |
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weaker than a weld |
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stronger than a weld |
A joint created by soldering is not as strong as a weld and not as strong as the original metal.