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Mr. Dubey • 100.64K Points
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Q. An effective method of testing for air bubbles in a pipe is to:

  • (A) Measure pipe back wall echo amplitude
  • (B) Analyze the frequency spectrum of pipe back wall echo
  • (C) Transmit sound across pipe diameter and look for echo loss
  • (D) Transmit sound across pipe diameter and look for echoes from air bubbles
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