Which agency requires ground fault interrupters to be used when operating power tools outside?

Which agency requires ground fault interrupters to be used when operating power tools outside?
 
  A) EPA B) OSHA C) ANSI D) UL

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[Ques. 2] Some stem nuts may need to be replaced because ________.
 
  A) vibration has caused them to fall out
  B) the threads have been stripped from wear and tear
  C) of the hammer effect of lost motion
  D) rust and corrosion have destroyed them

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[Ques. 3] How often should live circuits be worked on?
 
  A) When somewhat necessary B) When the power goes out
  C) Whenever deemed necessary D) Only when absolutely necessary

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[Ques. 4] If an electric actuator/operator motor fails, it must be ________.
 
  A) replaced B) documented C) inspected D) repaired

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[Ques. 5] When the safety cap is removed from acetylene cylinders that hold 55 ft3 or more:
 
  A) The cylinder must be chained to a cart or structure.
  B) The cylinder must be in a vertical position.
  C) The cylinder must have a regulator installed on it.
  D) The cylinder must be laying in a horizontal position.