Most houses have vents that open and close manually without any central control. Cities across the United States recommend the use of such vents in an effort to save energy. In most cases, household occupants do not use the entire house at the same time; the tendency is to use certain rooms for long periods of time. For example, the living room and dining room may be used heavily, while the kitchen is used at certain hours of the day. To cool or heat a room, the vent system must work to cool or heat the entire house. A house can save energy if the vents of unused rooms are closed; this will push the hot or cold air to where it is needed most and will reduce the load on the conditioning system. Develop an objective tree to clarify the need statement, and prioritize the objectives
laid out in the problem statement. You may add features that are not listed clearly in the problem statement but will give an additional advantage to the proposed design.
What will be an ideal response?
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Tensile strength is determined by ____.
A. dividing the maximum load by the original cross-sectional area of the specimen at the middle B. multiplying the maximum load by the original cross-sectional area of the specimen at the middle C. dividing the original cross-sectional area by the maximum load D. the diameter squared times 0.785
The electrical conductivity (EC) of a paste of a saline soil and water is generally less than 4 dS/m
Indicate whether the statement is true or false
The gasoline engine of a hybrid electric stops running when the vehicle stops at a traffic light. Technician A says that it is normal for most hybrid electric vehicles. Technician B says that there is a fault with the engine. Which technician is correct?
A) Technician A only B) Technician B only C) Both technician A and technician B D) Neither technician A nor technician B
__________ is the process of varying fluid flow by changing the settings on fluid flow controls such as valves, dampers, and blowers.
A. Adjusting B. Balancing C. Documenting D. Testing