Plumbing Inspection Section#2 Water Heaters Quiz#2

You should have finished Study Session 1 before starting this study session. This study session deals with gas meters, gas piping, and combustion air as it applies to gas water heaters. This is a greatly condensed version of the discussion of these items in the Heating I Module.

The estimated completion time is one and a half hours.

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

• List eight problems commonly found with gas meters.
• List ten problems commonly found with gas piping.
• Briefly describe the test for inadequate combustion air at a gas appliance.

• Question 1

  Needs Grading

  	List five possible problems found with gas piping.
  	Selected Answer: 1. Leaks 2. Inappropriate materials 3. Inadequate support 4. Rusting 5. No drip leg 6. Missing shut-off valve 7. Improper connections Correct Answer: - Leaks - Inappropriate materials - Inadequate support - Rusting - No drip leg - Missing shutoff valves - Improper connections - Plastic pipe exposed above grade - Piping in chimneys or duct systems - Copper tubing not properly labeled Response Feedback: [None Given]

• Question 2

  Needs Grading

  	List four materials commonly used for gas piping.
  	Selected Answer: 1. Copper 2. Black steel 3. Stainless steel 4. Brass Correct Answer:   Plastic, copper, brass, or steel Response Feedback: [None Given]

• Question 3

  Needs Grading

  	List four problems that can be found with gas meters.
  	Selected Answer: 1. Rusting 2. Mechanical damage 3. Ice 4. Gas shut off and locked Correct Answer:   - Rusting - Mechanical damage - Gas shut off and locked - Ice - Undersized - Poor access - Leaks - Poor location Response Feedback: [None Given]

• Question 4

  Needs Grading

  	List three causes for a gas meter being shut off and locked by the utility.
  	Selected Answer: 1. Payment issue 2. Change of ownership 3. Only appliance is "red " tagged Correct Answer:   1. Non-payment of the gas bill 2. A change of ownership 3. The only appliance in the house is red tagged Response Feedback: [None Given]

• Question 5

  Needs Grading

  	List three common but incorrect locations for gas meters.
  	Selected Answer: 1. Under combustible stairwells 2. Within three feet of ignition sources 3. Below the drip line of the roof 4. In unvented location Correct Answer:   - Under combustible stairwells - Within 3 feet of ignition sources - Below the drip line of the roof - In unvented locations Response Feedback: [None Given]

• Question 6

  Needs Grading

  	What is the purpose of the drip leg?
  	Selected Answer: To prevent gas pipe from being jammed by forein objects Correct Answer:   The drip leg is intended to catch foreign material before it gets into gas valves, burners, etc. Response Feedback: [None Given]

• Question 7

  Needs Grading

  	Where should you find a drip leg in a house with gas appliances?
  	Selected Answer: Drip leg should locate at the bottom of the vertical pipe going into gas appliances Correct Answer:   The first appliance in from the meter must have one and in some areas every appliance needs one. Response Feedback: [None Given]

• Question 8

  0 out of 0 points

  	Half-inch diameter copper tubing used for gas piping should be supported every:
  	Selected Answer:   6 feet horizontally Answers: 2 feet horizontally 4 feet horizontally   6 feet horizontally 8 feet horizontally 10 feet horizontally Response Feedback: Good work

• Question 9

  0 out of 0 points

  	Is teflon tape acceptable as a sealing method for threaded connections in gas piping?
  	Selected Answer:   No Answers: Yes   No Response Feedback: Good work

• Question 10

  0 out of 0 points

  	An owned furnace requires a shut off valve near the appliance, but a rented water heater does not.
  	Selected Answer:  False Answers: True  False Response Feedback: Good work

• Question 11

  0 out of 0 points

  	The term black steel refers to steel pipe which has no protective coating.
  	Selected Answer:  True Answers:  True False Response Feedback: Good work