| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.11 |
| Score | 0% | 62% |
When cutting hard metals with a hacksaw you should choose a blade with __________ teeth per inch (TPI).
even |
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odd |
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low |
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high |
Blades with more and smaller teeth (high TPI) cut harder metals more effectively while blades with fewer and larger teeth (low TPI) cut softer metals more effectively.
What is a micrometer used for?
ensuring that a surface is level |
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transferring dimensions between objects |
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measuring the diameter of cylindrical objects with high precision |
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measuring length around corners |
Micrometers provide accuracy to the thousandths of an inch and come in outside and inside varieties. An outside micrometer is used to measure outside thickness, such as the diameter of a bolt, while an inside micrometer is used to measure the inside dimension of an object, such as the diameter of the hole of a nut or the width of a channel.
The primary difference between a claw and a ball-peen hammer is which of the following?
their handle shape |
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their non-striking end |
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their size |
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their striking end |
The most common striking tool is the hammer and the most common variety of hammer is the claw hammer. The claw hammer has two ends, one to drive nails and one to remove nails. Ball-peen hammers replace the claw with a rounded end that's used to round off the edges of metal pins and make gaskets.
Which of the following statements about solding is not true?
flux is used to clean surfaces before soldering |
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solder is an alloy of lead and tin |
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soldering can only join metals |
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solder has a comparatively low melting point |
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 statemements about chucks is not true?
a chuck is tightened and loosened using a chuck key |
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a chuck's size indicates the largest diameter drill bit that will fit |
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a chuck's size indicates the largest circumference drill bit that will fit |
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electric drills utilize a chuck to hold the drill bit |
Electric drills utilize a chuck to hold the drill bit. A chuck's size indicates the largest diameter drill bit that will fit. A chuck is tightened and loosened using a chuck key.