What is the difference between a a 90 percent furnace with a sealed combustion system and a typical 90 percent furnace?
A) Sealed combustion units do not produce any combustion products.
B) Sealed combustion units use household vented air for combustion.
C) Sealed combustion units may use PVC pipe for venting material.
D) Sealed combustion units require combustion air to be piped in from the outside.
D
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Las instalaciones de capa doble:
a. no necesitan uniones de expansión. b. no necesitan que las uniones estén escalonadas. c. suelen tener su capa exterior sujeta con alambres. d. se utilizan en aplicaciones de temperaturas altas.
What is a “cascade” system?
a. The low temp system evaporator cools the condenser of the high temp system. b. The high temp system evaporator cools the condenser of the low temp system.
What are some of the exceptions to the conventional Clements/Dyksterhuis successional model when overgrazing problems are corrected?
What will be an ideal response?
A tire is inflated to a pressure of 35.0 psi. How much weight does the tire support it contacts the ground with an area of 30.0 in^2?
What will be an ideal response?