A resistive load of 5 ? is connected to an ac source of 120 V (rms) through an SCR circuit.
a. If the SCR circuit consists of a single SCR, and if the triggering angle is
adjusted to 30o, calculate the power consumption of the load.
b. If the SCR circuit consists of two back-to-back SCRs, calculate the power
consumption of the load assuming that the triggering angle is kept at 30o
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How is placement of the condenser line determined when drawing a PH diagram of an operating system?
A) The condenser line can be drawn anywhere that crosses the saturation curve as long as it is a horizontal line. B) Draw a vertical line across the saturation curve on a constant enthalpy line equal to the system high side absolute temperature. C) Draw a horizontal line across the saturation curve on the constant pressure line equal to the system high side absolute pressure. D) The condenser line is always drawn on the horizontal line representing 275 psia absolute pressure.
Solid stone counters are very durable; however, the stone is also porous and should be ____ periodically.
A. waxed B. polished C. painted D. sealed
What is the deduct for 3/4" EMT on a 90 degree stub up?
What will be an ideal response?