Primary resistor starters are used to start squirrel cage motors in situations where limited torque is required ____.
a. to save in operation costs
b. for a fast response
c. for short periods of operation
d. to prevent damage to driven machinery
d. to prevent damage to driven machinery
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El componente de distribución de energía que se utiliza para elevar y bajar el voltaje es el/la :
a. transformador. b. conductor. c. julio. d. batería.
How does soot accumulation on the inside of the heat exchanger affect system efficiency?
A) The soot increases the heat exchanger internal resistance, thereby increasing efficiency. B) The soot provides extra fuel during the high-fire stage, thereby increasing efficiency. C) The soot acts like an insulator on the inside of the heat exchanger, thereby increasing efficiency. D) The soot acts like an insulator on the inside of the heat exchanger, thereby reducing efficiency.
Which type of collapse is usually limited to wood-frame structures?
A) Inward outward collapse B) Cantilever floor collapse C) Lean over collapse D) Curtain fall wall collapse
Determine the sound power level of a wind turbine located on a ridge 5,000 feet away from a residence with a sound pressure reading of 42 dB measured outside a building.
What will be an ideal response?