What is the difference between the analytical and experimental approaches to heat transfer? Discuss the advantages and disadvantages of each approach.
What will be an ideal response?
The experimental approach (testing and taking measurements) has the advantage of dealing with the actual physical system, and getting a physical value within the limits of experimental error. However, this approach is expensive, time consuming, and often impractical. The analytical approach (analysis or calculations) has the advantage that it is fast and inexpensive, but the results obtained are subject to the accuracy of the assumptions and idealizations made in the analysis.
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Too fast a cutting speed results in ____.
A. the top edge of the plate being melted or rounded off B. an incomplete cut C. the sides of the kerf being slightly dished D. gouges in the side of the cut
Answer the following statement(s) true (T) or false (F)
1. For a transformer of 600 volts or less, overcurrent protection is permitted. 2. When load taps are made in the tie circuit between transformers, the current-carrying capacity shall not be more than a stipulated percentage (200%) of the rated secondary current of the largest capacity transformer connected to the secondary tie. 3. Transformers may be operated in parallel and protected as a unit if their electrical characteristics are similar. 4. Transformers are required to have a disconnecting means located in sight from the transformer or in a remote location if the transformer is a class 2 or class 3 transformer. 5. The fire hazard potential of oil-insulated transformers is greater than that of askarel-insulated transformers.
Explain what can be done during the rough-in phase to make switch installation easier in the finish phase of the wiring process.
What will be an ideal response?
The upper control limitUCL is defined as:
a. the lowest point established as the bottom specification on a control chart. LCL X-bar = Average X-bar – (A2 X Average R). b. a term used on a Table designed to identify factors for Range control limits. c. are boundaries that tell you if the process is in control. d. the highest point established as the top specification on a control chart. UCL X-bar = Average X-bar + (A2 X Average R).