Practice Quiz

Green Plumbing - Question List

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111. Each of the following is a common hot water distribution system design, except:
  1. Alternating grid
  2. Central core
  3. Manifold/parallel
  4. Trunk, branch and twig
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112. Each of the following is a historical problem with recirculating hot water systems except:
  1. Wasted energy
  2. Corroded pipes
  3. Low water flow rate
  4. Joint leakage
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113. Which option below shows the chronological order of the evolution of recirculating water heating systems?
  1. Fully-heated loop - Fully-heated loop w/aquastat - Half-heated loop
  2. Half-heated loop - Half-heated loop, pump at last fixture - Fully-heated loop w/aquastat
  3. Half-heated loop - Fully-heated loop - Fully-heated loop w/aquastat
  4. Half-heated loop, pump at last fixture - Half-heated loop -Fully-heated loop
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114. What drove the recirculating system design change from a fully-heated loop with aquastat to a half-heated loop?
  1. Eliminating risk from wiring from the pump to the aquastat
  2. Eliminating wasted water heating in the piping used only to complete the loop
  3. Reducing the space requirement for the recirculating system
  4. A and B above
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115. Which of the following is one of the chief considerations in further development of hot water distribution systems?
  1. Reducing time to hot water at fixtures
  2. Minimizing heated water loss from pipes
  3. Both A and B
  4. Neither A nor B
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