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Hoshuia Hoshuia
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6 years ago
The difference between 80 efficiency furnaces and a 90 efficiency furnaces is that 90 efficiency furnaces
 
  A) use more efficient air filters
  B) use more combustion air per 1000 Btu firing rate
  C) have an extra recuperative heat exchanger that condenses water out of the flue gas
  D) burn more gas to increase the heat exchanger temperatures

 Q. 2

Unbalanced seals have a _____ face loading than balanced seals.
 
  a. lower
  b. higher
  c. lighter
  d. more evenly distributed

 Q. 3

A sequencer might be utilized:
 
  A) In repetitive processes B) In training new welders
  C) On thin metals D) For increased weld pool size
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FakeUserFakeUser
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6 years ago
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Hoshuia Author
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#2
6 years ago
Thanks ... 100% Correct  Thumbs Up Sign
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#3
6 years ago
You're very welcome
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