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The following data were obtained on a 25- kVA, 2400:240-V, 60-Hz, single-phase distribution transformer:
• Open-circuit test with meters on LV side: 240 V, 3.2 A, 165 W
• Short-circuit test with meters on HV side: 55 V, 10.4 A, 375 W
Compute the worst voltage regulation and the power factor at which it occurs, when the transformer is delivering rated output at rated secondary terminal voltage of 240 V. Sketch the corresponding phasor diagram.
Carry out a sensitivity analysis on the adipic acid project described in Example 9.5. Investigate the sensitivity of the 10-year NPV to variation in total fixed capital (-20% to +50%), annual gross profit (-20% to +30%), and project construction s..
question 1a a receptionist who has been working in a large accountancy firm for eleven months has been complaining of
A human being (75 kg ) consumes about 6000 Kj of food per day. Assume that the food is all glucose and that overall reaction is- C6H12O6 +6O2 ------à 6CO2 +6H20 , Δ H= -2816 KJ
6. Famous New Zealand scientist Ernest Rutherford was awarded a Nobel Prize in which field? 7. What is the chemical symbol for gold? 8. K is the chemical symbol for which element?
Estimate the heat-transfer coefficient for steam condensing on the outside, and on the inside, of a 25 mm o.d., 21 mm i.d. vertical tube 3.66 m long. The steam condensate rate is 0.015 kg/s per tube and condensation takes place at 3 bar
The catalyst is in the form of 1/16th inch (1.588 mm) beads with average bulk density of 700 kg/m3 . Design, size, and cost a reactor for making 200,000 metric tons per year of cyclohexane using this process.
If the scatter in the individual samples of the previous problem is reduced to that listed below, would there be a justification (0.95 probability level) for saying there was a difference between the two materials? (Note that mean values of the tw..
If the excitation is adjusted such that the magnitudes of the excitation voltage and the terminal voltage are equal, and if the motor is taking 20 A, find the torque developed.
The resulting products are cooled and passed over a medium-temperature shift catalyst that gives an outlet composition corresponding to equilibrium at 350 °C.
Zirconium is one of the few metals that retains its structural integrity upon exposure to radiation. The fuel rods in most nuclear reactors therefore are often made of zirconium.
Name the microstructural products of eutectoid iron-carbon alloy (0.76 wt% C) specimens that are first completely transformed to austenite, then cooled to room temperature at the following rates:
A flat slab of Douglas fir wood 50.8 mm thick containing 30 wt% moisture is being dried from both sides (neglecting edges and ends). The equilibrium moisture content at the surface of the wood due to the drying air blown over it is held at 5 wt% mois..
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