prohibited fittings & connections review questions\n1. the termvertical with reference to piping means…

prohibited fittings & connections review questions\n1. the termvertical with reference to piping means departing from true vertical by \n__________ than ______ degrees.\n2 a double y may not be installed in a piping which is ______________\n3. a ty installed in a horizontal pipe to receive another horizontal pipe is not \nacceptable because waste will run ________ and ________ in the horizontal piping,\nand eventually may cause a __________.\n4. a double ty, regardless of opening sizes, if installed in a nominally horizontal pipe \nwill:\na) permit waste to flow upstream in the main drain in which it is installed\nb) permit waste from one branch to flow up the opposite branch\nc) cause solid waste to catch and build up on the weir of the fitting\nd) be quite acceptable\n5. a 90° bend installed in drainage piping should not have a radius less than the \ndiameter of the pipe. a lesser radius is liable to cause a ______________ in the \npiping ____________.\n6. a galvanized drainage pipe should not be drilled, tapped or welded.\nto connect a pipe by those means could:\na) cause blockage\nb) reduce the effective diameter of the main pipe\nc) result in destruction of the protective coatings\nd) cause all of the above\n7. vent piping must connect above the flood level rim of the highest fixture to prevent \nthe ______ piping as acting as a ______ pipe.\n8. a 90° short sweep elbow should not be used to change direction from ______ \nto__________.\n9. a double ty may be used if the barrel of the fitting is a minimum of 3 and the \nbranches are ______, ______ or ______ inches.\n10. there are ______ __________ restrictions placed on double____\n11. there are no restriction placed on tys when installed in __________ piping.\n12. list 4 prohibited fittings and explain why each is so.

prohibited fittings & connections review questions\n1. the termvertical with reference to piping means departing from true vertical by \n__________ than ______ degrees.\n2 a double y may not be installed in a piping which is ______________\n3. a ty installed in a horizontal pipe to receive another horizontal pipe is not \nacceptable because waste will run ________ and ________ in the horizontal piping,\nand eventually may cause a __________.\n4. a double ty, regardless of opening sizes, if installed in a nominally horizontal pipe \nwill:\na) permit waste to flow upstream in the main drain in which it is installed\nb) permit waste from one branch to flow up the opposite branch\nc) cause solid waste to catch and build up on the weir of the fitting\nd) be quite acceptable\n5. a 90° bend installed in drainage piping should not have a radius less than the \ndiameter of the pipe. a lesser radius is liable to cause a ______________ in the \npiping ____________.\n6. a galvanized drainage pipe should not be drilled, tapped or welded.\nto connect a pipe by those means could:\na) cause blockage\nb) reduce the effective diameter of the main pipe\nc) result in destruction of the protective coatings\nd) cause all of the above\n7. vent piping must connect above the flood level rim of the highest fixture to prevent \nthe ______ piping as acting as a ______ pipe.\n8. a 90° short sweep elbow should not be used to change direction from ______ \nto__________.\n9. a double ty may be used if the barrel of the fitting is a minimum of 3 and the \nbranches are ______, ______ or ______ inches.\n10. there are ______ __________ restrictions placed on double____\n11. there are no restriction placed on tys when installed in __________ piping.\n12. list 4 prohibited fittings and explain why each is so.

Answer

Brief Explanations:

These questions pertain to plumbing regulations and best - practices. Knowledge of plumbing codes and the behavior of fluids in pipes helps answer them. For example, in question 4, understanding how fittings affect waste flow is key. In question 6, knowledge of the properties of galvanized pipes is needed.

Answer:

  1. not more; 15
  2. under pressure
  3. back; forth; blockage
  4. c) cause solid waste to catch and build up on the weir of the fitting
  5. blockage; system
  6. d) cause all of the above
  7. drain; siphon
  8. horizontal; vertical
  9. 1 - 1/2; 2; 3
  10. specific size; TY fittings
  11. vertical
  12. Examples: 90° short sweep elbow (can cause blockage when changing direction from horizontal to vertical), double Y in under - pressure piping (can lead to improper flow), TY in horizontal pipe to receive another horizontal pipe (waste can run back and forth and cause blockage), galvanized pipe drilled/tapped/welded (can cause blockage, reduce pipe diameter, and damage protective coating).