For a Digital Muti-meter when set to the Diode Test, It will indicate continuity when the RED lead is connected to the Anode of a known good Diode and the black lead is connected to the Cathode (will show Forward voltage drop). When the leads are Reversed, there is no continuity indicated. With this knowledge, you know test an unknown transistor whose terminals are numbered #1,#2 and #3 and obtained the following result:

Red #1 #1 #2 #2 #3 #3
Black #2 #3 #1 #3 #1 #2
Result No Continuity, Continuity, No Continuity, Continuity, No Continuity, No Continuity

a) Is the Transistor Good or Bad?
b) Which terminals #1, #2 or #3 is the Base?
c) Is it PNP or NPN?

A3-mm-thick panel of aluminum alloy (k 177 w/m-k, c 875 j/kg-k and ? = 2770 kg/m) is finished on both sides with an epoxy coating that must be cured at or above t,-150°c for at least 5 min. the production line for the curing operation involves two steps: (1) heating in a large oven with air at ts,0-175°c and a convection coefficient of h, 40 w/m2. k, and (2) cooling in a large chamber with air at 25°c and a con- vection coefficient of he 10 w/m2.k. the heating portion of the process is conducted over a time interval te which exceeds the ime required to reach 150°c by 5 min (h = r + 300 s). the coating has an emissivity of ? = 0.8, and the temperatures of the oven and chamber walls are 175 and 25°c, respectively. if the panel is placed in the oven at an initial temperature of 25°c and removed from the chamber at a safe-to-touch tempera ture of 37°c, what is the total elapsed time for the two-step curing operation?

Asimple rankine cycle uses water as the working fluid. the water enters the turbine at 10 mpa and 480c while the condenser operates at 6 kpa. if the turbine has an isentropic efficiency of 80 percent while the pump has an isentropic efficiency of 70 percent determine the thermal efficiency

Analyze the factors that influence the choice between the following pairs of processes to make the products indicated: i) sand casting versus die casting of an electric-motor housing ii) thread rolling versus machining of a bolt for high-strength application. (co3/c5)