Summarize the properties of copper-zinc alloys.
What will be an ideal response?
Copper-zinc alloys are the most popular brazing alloys. They are available as regular and low-fuming alloys. The zinc in this braze metal has a tendency to burn out if it is overheated. Overheating is indicated by a red glow on the molten pool, which gives off a white smoke. The white smoke is zinc oxide. If zinc oxide is breathed in, it can cause zinc poisoning. Using a low-fuming alloy will help eliminate this problem. Examples of low-fuming alloys are RCuZn-B and RCuZn-C.
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Alexander Hamilton believed that a limited national debt
A. would do great harm to the nation's economy. B. might lead to military weakness. C. could persuade individuals and nations not to lend money to the United States. D. was beneficial, because people to whom the government owed money would work hard to make the nation a success. E. could help his economic plans but not his political plans.
Which of the following is not a recognized building code occupancy?
A) Assembly B) Educational C) Business D) Institutional E) Office
After leveling, the last frame member of a knockdown metal door frame to be secured is the _____
a. strike jamb b. hinge jamb c. head jamb d. closer sleeve
In a single-phase motor, the resistance of the run winding will be _____
a. less than that of the start winding b. slightly more than that of the start winding c. equal to that of the start winding d. exactly twice that of the start winding