Plumbing Inspection Section#3 Drain, Waste and Vent Plumbing Quiz#6

You should have finished Study Session 5 before starting this study session. This study session deals with floor drains and the venting system.

The estimated completion time is one to one and a half hours.

Objectives
At the end of this study session, you should be able to:

• List seven problems commonly found with floor drains.
• Describe the function of the vent system.
• List common materials used in the vent system.
• Describe the simple tests used to check whether the venting system is working.
• List seven common problems found with the venting system.

• Question 1

  Needs Grading

  	Explain briefly the problems with venting kitchen island sinks.
  	Selected Answer: most home owners don't want vents running up through the middle of their kitchen.  Correct Answer: Kitchen islands are not adjacent to walls; therefore the vent pipe is some distance from the island, often exceeding the maximum allowable distance between trap and vent. Response Feedback: [None Given]

• Question 2

  Needs Grading

  	Explain briefly the simple test required to check the venting system when you test functional drainage from a fixture.
  	Selected Answer: flow water at each fixture Correct Answer:   Listen for gurgling as the last bit of water leaves the drain, and smell for sewer odors. Response Feedback: [None Given]

• Question 3

  Needs Grading

  	Explain the purpose of a backwater valve.
  	Selected Answer: it is design to protect home against sewer backup Correct Answer:   To protect the home against sewer back up. Response Feedback: [None Given]

• Question 4

  Needs Grading

  	How high can a wet vent extend?
  	Selected Answer: 1 story Correct Answer:   Over one floor level Response Feedback: [None Given]

• Question 5

  Needs Grading

  	List five common materials used in venting systems.
  	Selected Answer: copper galvanized steel cast iron ABS  PVC Correct Answer:   1. Copper 2. Galvanized steel 3. Cast iron 4. ABS plastic 5. PVC plastic Response Feedback: [None Given]

• Question 6

  Needs Grading

  	List seven problems found with vents.
  	Selected Answer: 1. Missing 2. Ineffective 3. Poor vent pipe arrangements 4. Too small or too big 5. Island venting problems 6. Vent termination problems 7. Automatic air vents Correct Answer: 1. Missing 2. Ineffective/incomplete 3. Poor vent pipe arrangements 4. Too small or too long 5. Island venting problems 6. Vent termination problems 7. Automatic air vents. Response Feedback: [None Given]

• Question 7

  Needs Grading

  	List three reasons a floor drain may back up.
  	Selected Answer: 1. Overloaded storm sewer at the street (combination sewers) 2. An obstructed or broken storm sewer for the house 3. A clogged, collapsed or borken trap or drain pipe Correct Answer:   1. Overloaded storm sewers at the street 2. Obstructed or broken storm sewer for the house 3. A clogged, collapsed or broken trap or drain pipe Response Feedback: [None Given]

• Question 8

  Needs Grading

  	What function of the venting system does the automatic air vent not serve?
  	Selected Answer: it doesn't allow air to be pushed out through the vent Correct Answer: Automatic air vents do not allow air to be pushed out through the vent, an action which is sometimes necessary in order to equalize air pressure in the plumbing system. Response Feedback: [None Given]

• Question 9

  Needs Grading

  	What is an automatic air vent?
  	Selected Answer: It allows air to be drawn in when waste plumbing system in that area is under negative pressure.  Correct Answer: An automatic air vent is a spring loaded device which allow air to be drawn in when the waste piping is under negative pressure, but will close when the waste pipe is under positive pressure so water cannot leak out. Response Feedback: [None Given]

• Question 10

  Needs Grading

  	What is the maximum height of vent pipe above the roof line?
  	Selected Answer: 12 to 24 inches Correct Answer:   12 inches Response Feedback: [None Given]

• Question 11

  Needs Grading

  	What is the minimum vent diameter in cold climate areas above the roof line?
  	Selected Answer: 3 inch Correct Answer:   3 inches Response Feedback: [None Given]

• Question 12

  Needs Grading

  	What is the purpose of the venting system?
  	Selected Answer: equilize air pressure in the waste plumbing system Correct Answer:   To equalize the air pressure in the waste plumbing system so that the traps won?t siphon. Response Feedback: [None Given]

• Question 13

  Needs Grading

  	Where should the floor drain be located?
  	Selected Answer: they should be at the lowest point in the floor Correct Answer:   At the low point in the floor Response Feedback: [None Given]

• Question 14

  0 out of 0 points

  	How far can a vent be from an operable door?
  	Selected Answer:   3 feet Answers: 1 foot 2 feet   3 feet 4 feet 5 feet Response Feedback: Good work

• Question 15

  0 out of 0 points

  	Nearly horizontal vent pipes should slope slightly down away from the trap they are protecting.
  	Selected Answer:  False Answers: True  False Response Feedback: Good work

• Question 16

  0 out of 0 points

  	The vent diameter must be as large as the trap diameter.
  	Selected Answer:  False Answers: True  False Response Feedback: Good work

• Question 17

  0 out of 0 points

  	The vent is typically located upstream of the trap.
  	Selected Answer:  False Answers: True  False Response Feedback: Good work