A fusible plug is a metal fitting that has a hole drilled through it and the hole is filled with ____.
A. material with a low melting point
B. plastic
C. copper fused with brass
D. a metal alloy that will burn when overheated
Answer: A
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An electric motor runs “hot” under load, owing to internal irreversibilities. It has been suggested that the associated energy loss be minimized by thermally insulating the motor casing. Comment critically on this suggestion.
What will be an ideal response?
All of the following may help prevent health problems caused by lead EXCEPT ____
a. having family members inoculated to prevent lead poisoning b. keeping a good stand of vegetation to prevent children from contact with contaminated soil and possible ingestion of lead; change sandbox sand yearly c. cleaning children’s hands; keep house free of dirt; observe other cleanliness measures to lower the amount of contaminated soil ingested or breathed by children d. removing chipping lead-based paint from old homes; clean up thoroughly; repaint with new paints e. testing children’s blood for lead levels in high-risk neighborhoods (areas with old, rundown housing and areas near heavy traffic) f. testing soil for lead
The term ____ means a circle and is the path of electron flow consisting of the voltage source, conductors, load component, and return path to the voltage source.
A. parallel B. circuit C. diode D. series
High quality welds can be made rapidly with excellent uniformity on a wide variety of metals and thicknesses when using the ____ welding process.
A. soldering B. shielded metal arc C. gas tungsten arc D. stick electrode E. both b and d