When arc welding, the general rule is that arc length should be _____
a. half the electrode diameter
b. equal to the electrode diameter
c. twice the electrode diameter
d. slightly less than the electrode diameter
b
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The minimum work input required by the air compressor in a Brayton cycle with P1 = 100 kPa, T1 = 27°C, and P2 = 600 kPa is nearest:
A) 180 kJ/kg B) 200 kJ/kg C) 220 kJ/kg D) 240 kJ/kg
Determine the area of a rectangle 18.0 inches long and 5.60 inches wide rounded to 3 significant digits.
Fill in the blank(s) with the appropriate word(s).
The subsequent problems deal with the circuit below containing complex impedances.
If Z1=0?, Z2=10?, and Z3=10j?, what is the equivalent impedance of the circuit?
A. 10 / (j?1) ? B. 10j / (j?1) ? C. ?10j / (j?1) ? D. ?10 / (j?1) ? E. 10 + 10 j?
A 30, 300 mile, 345-kV line has series impedance of z = 0.03 + j0.4 ?/mile and shunt admittance y = j5.0 x 10-6 mho/mile.
a. Calculate the line's characteristic impedance Zc and the propagation constant ?? b. Initially assume that the receiving end of the line is open-circuited and has a line to line voltage of 345 kV. Calculate the sending end line to line voltage magnitude. c. Draw the long line ? equivalent circuit for this line, showing the values of all parameters.