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Author Question: What is the required input in watts to operate a 70 efficient 3 horsepower electric motor? A) 3 ... (Read 110 times)

Shelles

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on: Jul 26, 2018
What is the required input in watts to operate a 70 efficient 3 horsepower electric motor?
 
  A) 3 HP  746 watts/HP = 2228 watts work done input is the same as work done
  B) 3 HP  746 watts/HP = 2228 watts work done 2228 watts  0.7 = 1560- watts input
  C) 3 HP  746 watts/HP = 2228 watts work done 2228 watts work done / 0.7 = 3183 watts input
  D) The input power cannot be determined without knowing the voltage.

Question 2

How much mechanical force is required to lift a 300 pound compressor 3 feet?
 
  A) 300 pounds / 3 feet = 100 footpounds of force
  B) 300 pounds of force
  C) 300 pounds  3 feet = 900 footpounds of force
  D) Mechanical force alone will not lift the compressor.


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tkempin

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

C

Answer to Question 2

C


Shelles

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Reply 2 on: Jul 26, 2018
Excellent

juliaf

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Reply 3 on: Yesterday
Wow, this really help

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