Plumbing Inspection Section#2 Water Heaters Quiz#7

You should have finished Study Session 6 before starting this study session. This study session deals with dual water heaters, circulating hot water systems, fan-assisted gas water heaters, high efficiency gas water heaters, combination systems, and tankless coils.

The estimated completion time is two hours.

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

• Describe two different arrangements for dual water heaters.
• Describe in two sentences how two water heaters in the same room should be arranged from a piping standpoint.
• Describe in one sentence the purpose and arrangement of a circulating hot water system.
• List four problems commonly found with circulating hot water systems.
• Describe in two sentences how fan assisted gas water heaters are different from conventional water heaters.
• List four problems common to fan assisted gas water heaters.
• Describe in three sentences the differences between high efficiency water heaters and conventional water heaters.
• Describe in one sentence a direct vent water heater that is not high efficiency.
• Describe in three sentences how combination hot water and heating systems work.
• List three problems specific to combination systems.
• Describe in two sentences tankless coils and how they are tied into the heating system.
• Describe three problems with tankless coils.

• Question 1

  Needs Grading

  	In a circulating hot water system, does the circulating pump run continuously? What are the possibilities?
  	Selected Answer: [None Given] Correct Answer:   The pump may be set to run continuously or it may be controlled by an aquastat. Response Feedback: [None Given]

• Question 2

  Needs Grading

  	List the common problems found with fan assisted gas water heaters.
  	Selected Answer: [None Given] Correct Answer:   1. Inoperative 2. Blower intake obstructed 3. Poor venting arrangement 4. Poor blower wiring Response Feedback: [None Given]

• Question 3

  Needs Grading

  	List the components of high efficiency gas water heaters that separate them from conventional systems.
  	Selected Answer: [None Given] Correct Answer: More insulation, direct vent, stainless steel tank, stainless steel heat exchangers, forced draft, different venting material, a sidewall or roof venting, hot surface ignition, 85% to 95% efficiency, 100°F to 150°F exhaust gas temperatures, internal condensate drains, energy cutoff switch on some systems. Response Feedback: [None Given]

• Question 4

  Needs Grading

  	List the problems commonly found with circulating hot water systems.
  	Selected Answer: [None Given] Correct Answer:   1. Inoperative 2. Leaking 3. Overheating or excess noise or vibration 4. Improper arrangement Response Feedback: [None Given]

• Question 5

  Needs Grading

  	List three common problems found with combination systems.
  	Selected Answer: [None Given] Correct Answer:   1. Inadequate heat 2. No hot water or inadequate hot water 3. No tempering valve Response Feedback: [None Given]

• Question 6

  Needs Grading

  	List three common problems with tankless coils.
  	Selected Answer: [None Given] Correct Answer:   1. Leaks 2. No tempering valve 3. Poor hot water pressure or flow Response Feedback: [None Given]

• Question 7

  Needs Grading

  	What are the advantages of combination systems?
  	Selected Answer: [None Given] Correct Answer:   Only one combustion appliance, efficient use of hot water, can be high efficiency combustion. Response Feedback: [None Given]

• Question 8

  Needs Grading

  	What are the disadvantages of combination systems?
  	Selected Answer: [None Given] Correct Answer:   Challenging to design, stagnant water, water that is too hot, the need for a tempering valve. Response Feedback: [None Given]

• Question 9

  Needs Grading

  	What is a sidearm heater?
  	Selected Answer: [None Given] Correct Answer:   A sidearm heater is a tankless coil mounted outside the boiler. Response Feedback: [None Given]

• Question 10

  Needs Grading

  	What is the exhaust material for a fan assisted water heater typically?
  	Selected Answer: [None Given] Correct Answer:   ABS or PVC piping Response Feedback: [None Given]

• Question 11

  Needs Grading

  	When are dual water heaters typically used?
  	Selected Answer: [None Given] Correct Answer:   When the house requires more hot water than a single hot water tank can supply. Response Feedback: [None Given]

• Question 12

  Needs Grading

  	When water heaters are installed side by side, how should the piping be arranged?
  	Selected Answer: [None Given] Correct Answer:   Piping should be arranged so that the heaters are installed in parallel rather than in series, with equal length piping. Response Feedback: [None Given]

• Question 13

  Needs Grading

  	When would a fan assisted gas water heater typically be used?
  	Selected Answer: [None Given] Correct Answer:   If the house has no chimney or a chimney too large for a water heater. Response Feedback: [None Given]

• Question 14

  0 out of 0 points

  	Are fan assisted water heaters condensing?
  	Selected Answer:   No Answers: Yes   No Response Feedback: Good work

• Question 15

  0 out of 0 points

  	Are fan assisted water heaters high efficiency?
  	Selected Answer:   No Answers: Yes   No Response Feedback: Good work

• Question 16

  0 out of 0 points

  	Is it possible to have a direct vent water heater that is not high efficiency?
  	Selected Answer:   Yes Answers:   Yes No Response Feedback: Good work

• Question 17

  0 out of 0 points

  	Would tankless coil heating systems be used with forced air heating?
  	Selected Answer:   Yes Answers: Yes   No Response Feedback: That's not correct