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Repeat Problem 4.2.9 for a delta-connected set of capacitors with a per-phase reactance of -j60 Ω connected in parallel with the load, and compare the result with that obtained in Problem 4.2.9.
Problem 4.2.9
Three identical impedances of 30 ∠30° Ω are connected in delta to a three-phase 173-V system by conductors that have impedances of 0.8 + j0.6 Ω each. Compute the magnitude of the line-to-line voltage at the terminals of the load.
estimate the purchased cost for the manhole plate.
Sketch the sinusoidal variations of drain current, drain voltage, and gate voltage superimposed on the direct values at the operating point. Assume reasonable common-source drain characteristics
A mixture of 25% ammonia gas and 75 % air ( dry basis) is passed upward through a vertical scrubbing tower , to the top of which water is pumped. Scrubbed gas containing 0.5 % ammonia leaves the top of the tower, and an aqueou..
For parts (a), (c), (d), (f), and (h) of Problem 10.20, determine the approximate percentages of the microconstituents that form. (a) Rapidly cool to 250(C (480(F), hold for 103 s, then quench to room temperature.
A balanced three-phase, wye-connected, 2400- V, 60-Hz source supplies two balanced wye connected loads in parallel. The first draws 15 kVA at 0.8 power factor lagging, and the second needs 20 kW at 0.9 power factor leading.
QUESTION 11 - Steam boiler plant in a petroleum refinery has an overall thermal efficiency on gross C.V . of the fuel of 85 % and an out put of 90720 kg of steam per hour. The steam is produced at a pressure ..
Calculate the molarity of each of these solutions. a. A 5.623-g sample of NaHCO3 is dissolved in enough water to make 250.0 mL of solution. b. A 184.6-mg sample of K2Cr2O7 is dissolved in enough water to make 500.0 mL of solution.
Plot the system curve on the pump characteristic given in Figure and determine the operating point and pump efficiency. Properties of the fluid: density 900 kg/m3, viscosity 1.36 mN m-2 s.
How do you use the rule of 70 to calculate economic growth?
In the manufacture of vinyl chloride (VC) by the pyrolysis of dichloromethane (DCE), the reactor conversion is limited to 55% to reduce carbon formation, which fouls the reactor tubes. Calculate the quantity of DCE fed to the reactor to produce 50..
Two watt meters are used, as shown in Figure 4.3.1, to measure the power absorbed by a balanced delta-connected load. Determine the total power in kW, the power factor, and the per-phase impedance of the load if the supply-system voltage is 120
Find the charge per unit length on the inner surface and on the outer surface of the outer cylinder.
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