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Author Question: If one of the power legs feeding a three phase motor is interrupted while the motor is operating: ... (Read 28 times)

ericka1

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on: Jul 26, 2018
If one of the power legs feeding a three phase motor is interrupted while the motor is operating:
 
  A) The motor will immediately stop running and will not draw any current.
  B) The motor will slow down by one third.
  C) Nothing will happen because the motor can still operate on the remaining two legs.
  D) The motor will slow down, draw high amp draw and burn out.

Question 2

An air conditioner is operating with low system pressures, an evaporator saturation temperature of 20F and a suction line temperature of 24F. The suction line is frosting. The most likely cause of these symptoms is:
 
  A) That the system is undercharged.
  B) That the system is overcharged.
  C) Excessive humidity in the air, causing the coil to frost up.
  D) Reduced airflow across the evaporator.


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zhanghao

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Reply #1 on: Jul 26, 2018
Answer to Question 1

D

Answer to Question 2

D


ericka1

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Reply #2 on: Jul 26, 2018
Thank you!


zhanghao

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Reply #3 on: Jul 26, 2018
Always glad to help...


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