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1)Which of the following is best analyzed using a steady state, spatially varying framework?   gas turbine  b) gasoline engine   c) steam engine    d) rotary automotive engine 2

Electrical Engineering

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1)Which of the following is best analyzed using a steady state, spatially varying framework?

 

gas turbine  b) gasoline engine   c) steam engine    d) rotary automotive engine

2. Which of the following properties is a modified energy content of the molecule? 

specific volume, v       b) internal energy, u     c) enthalpy, h  d) entropy, s

 

3. Which of the following is the correct unit and concept for power ? 

                        a) J (mass x acceleration)         b) W (energy/time)                    

                        c) J (force x distance)             d) W (energy x distance)

 

4. Which of the following two properties cannot specify the exact condition of water inside the vapor dome?

            a) P & T           b) T & x            

                        c) T & v           d) u & v

 

5. Which of the following reactions follows the conservation of mass (check all)? 

                        a) Thermal                   b) Electrical                  

                        c) Nuclear         d)hydro_electrical

 

6. If a motor needs 100W to operate and does 20W of work and dissipates 80W of heat, what is its efficiency?

                        a) 0.2                           b) 0.8                

                        c) 0.4                           d) 0.6

 

7. How many independent intensive properties do you need to fully describe the state of a simple compressible substance inside the vapor dome? 

                        a) 1                              b) 2                   

                        c) 3                              d) 4

 

8. You are boiling your potatoes in an open stove at a high elevation. You need to? 

                        a) cook it longer                       b) cook it shorter          

                        c) cook it the same amount of time d) depends on the weather

 

9. You are boiling water in a pressure controlled aircraft (1 bar) which is 30,000 ft in the air? What is true compared to doing the same things at sea level? 

The water will boil at a lower temperature                    

The water will boil at a higher temperature                   

The water will boil at the same temperature      

The water will not move into the vapor dome

 

10. Which is not a state on the P-v-T surface? 

                        a) liquid                       b) saturated vapor         

                        c) plasma                     d) liquid and vapor mixture