When using GTAW for open-root V-groove welds on carbon steel pipe in the 5G position, start at a tack
weld positioned at the _____.
a. top of the pipe and weld downhill
b. bottom of the pipe and weld uphill
c. right side of the pipe and weld downhill
d. left side of the pipe and weld downhill
b
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An ideal gas initially at 300 K and 1 bar undergoes a three-step mechanically reversible cycle in a closed system. In step 12, pressure increases isothermally to 5 bar; in step 23, pressure increases at constant volume; and in step 31, the gas returns adiabatically to its initial state. Take CP = (7/2)R and CV = (5/2)R.
(a) Sketch the cycle on a PV diagram. (b) Determine (where unknown) V, T, and P for states 1, 2, and 3. (c) Calculate Q, W, ?U, and ?H for each step of the cycle.
Technician A says that vehicle warranties are limited by mileage. Technician B says that vehicle warranties are limited by vehicle age. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B