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palantriel palantriel
wrote...
Posts: 464
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6 years ago
Excessive draft through the flue vent may cause _____.
 
  a. higher combustion efficiency
  b. soot formation
  c. lower combustion efficiency
  d. furnace short cycling

 Q. 2

An air contaminant that cannot be filtered out through normal mechanical filtration is
 
  A) sawdust B) pollen C) virus D) mold spores

 Q. 3

Which job would most likely not be open to a technician with a criminal background?
 
  A) Commercial installation technician B) Systems designer
  C) Residential service technician D) New construction installation technician
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6 years ago
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c

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C

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C
palantriel Author
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6 years ago
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