When multiplying signed numbers if there is an odd number of negative signs, the product is negative.
Answer the following statement true (T) or false (F)
True
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The list of symbols for a set of drawings gives the meaning of _____.
a. pictures b. abbreviations c. piece names d. arrows
The ____________________ thermostats used in automobiles have an expansive wax compound that expands at a predictable rate to open the valve in the thermostat.
Fill in the blank(s) with the appropriate word(s).
Pencils, knives, marking gauges, and chalk lines are all examples of ____________________
Fill in the blank(s) with correct word
Why are air-acetylene, air MAPP, or air-propane torches preferred over oxyacetylene torches for soldering copper pipes?
A) They all produce a much hotter flame than oxyacetylene torches. B) Oxyacetylene torches cannot be used with solder because of the possibility of adverse chemical reactions. C) They have smaller, more focused flames than oxyacetylene torches. D) Oxyacetylene temperatures can easily overheat the pipe.