Before a steel plate is used for practice welding, mill scale on the plate is removed because the DCEN used in
GTAW has little or no _____.
a. electrical conductance
b. flux resistance
c. arcing ability
d. cleaning action
d
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Explain what happens when standoff distance increases.
What will be an ideal response?
Nitrogen enters a steady-state process at T = 150 K and P = 0.1 MPa. A compressor increases the pressure to 0.4 MPa, and is followed by a heat exchanger. A second compressor increases the pressure to 2 MPa and feeds into a second heat exchanger. Each heat exchanger lowers the temperature isobarically to 150 K. If each compressor is adiabatic and has an efficiency of 80 %, determine the TOTAL work added per kilogram of nitrogen and the TOTAL heat removed per kilogram of nitrogen. Use Figure 2-3 for data.
A. +192 kJ/kg; -210 kJ/kg B. +298 kJ/kg; -4556 kJ/kg C. +154 kJ/kg; -172 kJ/kg D. +192 kJ/kg; -172 kJ/kg E. Insufficient information to solve
The VECI label includes all of these EXCEPT _________
A) Engine identification B) Valve lash C) Spark plug type and gap D) Horsepower and torque rating of the engine
What input signal of the 74192/74193 up/down counter can clear the counter to 0?
A) Cpu B) PL C) TCd D) MR