Answer Key: Self-Test D-4.2

  1. a. Air test
  2. c. 63 kPa (9 psig)
  3. b. The test plugs can be used repeatedly.
  4. b. Properly calibrated regulator
  5. c. Open-centre test plug
  6. a. Blower
  7. a. Squirrel cage
  8. b. At the blower intake
  9. a. Smoke candle
  10. c. Air molecules are smaller than water molecules and sometimes escape through pipe perforations.
  11. a. 7 kPa (1 psig)
  12. c. Triple the test pressure
  13. c. Installed and filled with water.
  14. b. Pipe grade
  15. d. a certificate of occupancy

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