Selective catalytic reduction (SCR) uses urea injection to reduce ________ emissions
A) CO2 B) NOx C) H2O D) CO
B
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Explain the difference between a concrete slab-on-ground and an elevated concrete slab.
What will be an ideal response?
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Heating cable for snow-melting is typically installed in a serpentine pattern _____.
a. 6" on center b. 12" on center c. 18" on center d. 24" on center
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If the condenser split of a unit is supposed to be 30° what is the head pressure of an R404A unit supposed to be if the ambient air at the condenser is 84°?
a. 210 psig b. 240 psig c. 270 psig d. 290 psig
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Why did it take so long for TOR to be adopted?
What will be an ideal response?
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