What is EROI, and why is it a helpful energy metric?
What will be an ideal response?
Energy return on energy invested. It helps us understand the cost of obtaining energy more from a life cycle perspective, as it includes the energy involved with raw materials extraction and processing. It allows us to avoid developing and exploiting energy resources that may require more energy to obtain that we get from using them.
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Answer the following statement(s) true (T) or false (F)
1. The geometric characteristic symbols are a set of fourteen symbols used in the language of geometric tolerancing. 2. A flatness tolerance can control form, orientation, or location. 3. Geometric tolerances are specified on a drawing through the use of a feature control frame. 4. When specifying a datum related control, the feature control frame may have up to five compartments. 5. The method of showing an extension line between two coplanar surfaces indicates that the surfaces are a single surface.
A duct system is pressurized by three pressures. Match each type of pressure to its correct definition.
A. the sum of the static and velocity pressures B. the pressure that pushes against the sides of the duct sections C. the pressure that results from the speed and the weight of the air
Dogs are the most common pet bred for profit.
Answer the following statement true (T) or false (F)
The recommended minimum pressure for water coming from a fire hydrant is:
A. 115 psi. B. 80 psi. C. 50 psi. D 20 psi.