When installing single conductor cables in tray systems with conductors size 4/0 and larger, they must be _____.
a. installed in multiple layers
b. installed in a single layer
c. spaced one cable diameter apart
d. derated according to the number of conductors in the tray
b. installed in a single layer
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In AC circuits, the total opposition to current flow is called _____________.
Fill in the blank(s) with the appropriate word(s).
A +2% grade intersects with a –1% grade at station (535+24.25) at an elevation of 300 ft. If the design speed is 65 mi/h, determine:
(a) the minimum length of vertical curve using the rate of vertical curvature Then, using the length found in part (a), (b) the stations and elevations of the BVC and EVC (c) the elevation of each 100-ft station (d) the station and elevation of the highpoint What will be an ideal response?
An inductor (L) and a capacitor (C) are in series across a sine wave ac source. Voltage across the inductor is 15 V and voltage across the capacitor is 20 V. The source voltage (VS) is
A) 5 V ?180° B) 15 V ?90° C) 5 V ?-90° D) 5 V ?90°
A test weld is done on scrap pieces of metal that are the same thickness and type of metal as the parts to be repaired.
Answer the following statement true (T) or false (F)