Technician Asays electrical circuits have an electrical pressure (force) that is used to move electrons through a circuit. Technician B says a lack of resistance in an electrical device (load) will prevent work being performed to the extent it was designed. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B
Answer: C
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A compound has the follOwing physical properties:
Critical Temperature = 1000 K Critical Pressure = 20 atm Boiling temperature at atmospheric pressure = 300 K Molar Volume of saturated liquid at atmospheric pressure = 0.1 L/mol Coefficient of Thermal Expansion for LIQUID is constant at 0.001 K-1 Isothermal Compressibility of LIQUID is constant at 5x10-4atm-1 Ideal Gas Heat Capacity is Cp*= 4R Heat capacity in the liquid phase is constant at Cv=0.3 L atm/mol K, In the gas/vapor phase, can be described by the equation of state: PV = RT + (BP3) Where B = 0.05 L mol-1atm-2 A) A stream of vapor enters a turbine at T=800 K and P=10 atm, and it leaves at T=500 K and P=2 atm. Find ?H and ?S for the vapor in this process. B) Derive general equations (i.e., valid for any fluid, not just this compound) that express ((??H)/(??V))_Tand ((??H)/?T)_?Ventirely in terms of measureable properties. Your expressions can include P, V, T, CP, CV, and/or their derivatives, as well as the gas constant R. C) The compound described above, initially in the liquid phase at T=300 K and P=1 atm, is placed in a rigid container and cooled to T=275 K. What is the change in molar enthalpy of the compound for this process?
In welded construction, what is meant by the term end return? Use a sketch if necessary.
What will be an ideal response?
Which of these may be used to restore damaged threads on a bolt?
A) Tap B) Die C) Both A and B D) Neither A nor B
Answer the following statement(s) true (T) or false (F)
1. Engineers having knowledge of any alleged violation of this Code, following a period of thirty days during which the violation is not corrected, shall report thereon to appropriate professional bodies and, when relevant, also to public authorities, and cooperate with the proper authorities in furnishing such information or assistance as may be required. 2. Engineers shall undertake assignments only when qualified by education or experience in the specific technical fields involved 3. Engineers shall not affix their signatures to plans or documents dealing with subject matter in which they lack competence, but may affix their signatures to plans or documents not prepared under their direction and control where the engineer has a good faith belief that such plans or documents were competently prepared by another designated party. 4. Engineers may accept assignments and assume responsibility for coordination of an entire project and shall sign and seal the engineering documents for the entire project, including each technical segment of the plans and documents. 5. Engineers shall strive to be objective and truthful in professional reports, statements or testimony, with primary consideration for the best interests of the engineer's client or employer. The engineer's reports shall include all relevant and pertinent information in such reports, statements or testimony, which shall bear the date on which the engineer was retained by the client to prepare the reports.