Which device will open first if a high temperature condition exists on an electric furnace?
A. fusible link
B. limit switch
C. high-pressure control
D. interlock
Answer: B
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What type of valve is a flow-regulating device that uses a flow-control element shaped like a hollowed out ball, attached to an external handle, to increase or decrease flow?
A) Ball valve B) Plug valve C) Butterfly valve D) Check valve
In centrifugal compressors, capacity control is accomplished by the use of ___________________________________ at the impeller inlet.
Fill in the blank(s) with the appropriate word(s).
Wall cabinets are ____.
A. varying heights B. 18 inches high C. 24 inches high D. 30 inches high
Captain John Smith's role at Jamestown can best be described as
A. very limited. B. saving the colony from collapse. C. persuading the colonists to continue their hunt for gold. D. worsening the colonists' relationship with the Indians. E. reducing the terrible death toll.