Technician A says aluminum oxide melts at 1200°F (649°C). Technician B says carbon steel wire brushes should be used to remove aluminum oxide prior to welding. Who is correct?
A. Technician A only
B. Technician B only
C. Both Technicians A and B
D. Neither Technician A nor B
D. Neither Technician A nor B
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Five moles of pure W vapor at T=50 ?C and P=0.5 bar is mixed with ten moles of pure Z vapor at T=50 ?C and P=0.5 bar. The resulting mixture is then expanded to a final state of T=50 ?C and P=0.1 bar. What is the total change in entropy of the vapor, in J/K?
This problem concerns mixtures of two compounds, W and Z. At T=50 ?C, the vapor pressures are PWsat = 0.6 bar and PZsat = 1.0 bar. Mixtures of the two compounds at this temperature can be modeled using the one-parameter Margules equation, with A = -1.5.
The advantage(s) of a Design/Bid/Build contractual arrangement is (are) _______
a. Reduced project time b. Non-adversary relationships among participants c. Known project cost before construction d. All of the above
What is the maximum reading on a typical R22 high pressure gauge?
A) 120 psig B) 800 psig C) 300 psig D) 500 psig
What level of tach reference information is required for the PCM to properly control a COP ignition system?
A. Level one information indicating that "a pair of cylinders`pistons is approaching TDC" B. Level two information indicating "which pair of cylinders`pistons is approaching TDC" C. Level three information indicating "which cylinder of the piston pair approaching TDC is on the compression stroke" D. None of this information is required for the PCM to control a COP ignition system