Speed control of a DC motor is much smoother if two separate ____________________, which convert the AC voltage to DC voltage, are used to control the motor.
Fill in the blank(s) with the appropriate word(s).
power supplies
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Sometimes a product leads to the development of ____ items, which are used in conjunction with the original item.
A. accessory B. replacement C. benchmark D. redesigned
All of the following statements are true EXCEPT:
A. Kevlar is more resistant to heat than graphite. B. composite graphite gaskets require a very smooth surface finish. C. graphite gaskets can be coated to lengthen their service life. D. graphite transfers heat from the engine to the coolant more quickly than Kevlar.
Given the chemical equation: H3PO4 + 3NaOH ----»Na3PO4 + 3H2O If you are told to add 355 pounds of phosphoric acid H3PO4 to the above equation how many pounds will you need to add to the sodium hydroxide NaOH in order to keep the equation balanced?
a. 394.8 tons b. 3.29 pounds c. 394.8 pounds d. 3948 pounds
A split central cooling system is installed with the control transformer located in the attic hung air handler and the condensing unit located outside. How many low voltage conductors need to be run to the condensing unit?
What will be an ideal response?