An expansion joint is a device used to ____.
A. prevent damage between boiler sections
B. connect the expansion tank into the system
C. allow for expansion and contraction of the loop piping with water temperature changes
D. connect the manual vent into the system
Answer: C
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Answer the following statement(s) true (T) or false (F)
1. The direction of rotation of three-phase motors can be reversed by interchanging any two-motor leads to the line. 2. Push-button interlocking is an electrical method of preventing both starter coils from being de-energized simultaneously. 3. NEMA specifications call for a starter to be derated. 4. Electrical interlocks are usually mounted on the side of a motor starter. 5. To reverse the direction of rotation of single-phase motors, both the starting and running winding motor leads are interchanged.
The first recorded attempt to reach Asia by a southern sea route was made by the Vivaldi brothers, who came from
a. Lisbon. b. Venice. c. Seville. d. Genoa.
What equation would you use to calibrate a power sprayer to deliver 2 gal per 1,000 sq. ft and 40 gallons per acre?
What will be an ideal response?
What purpose does the flexible coupling attached to the steering shaft serve?
A) Changes direction of movement B) Acts as a collapsible part of the steering shaft C) Both A and B D) Neither A nor B