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A 4000-V, 5000-hp, 60-Hz, 12-pole synchronous motor, with a synchronous reactance of 4 Ω per phase (based on cylindrical-rotor theory), is excited to produce unity power factor at rated load. Neglect all losses.
(a) Find the rated and maximum torques.
(b) What is the armature current corresponding to the maximum torque?
Three single-phase 100-kVA, 2400:240-V, 60-Hz transformers (each of which has an equivalent series impedance of 0.045+j0.16 Ω referred to its low-voltage side) are connected to form a three phase, 4160:240-V transformer bank, which in turn is conn..
Discuss how the phase equilibria of mixtures are represented using diagrams similar to the pressure-temperature and pressure-specific volume diagrams for one- component systems. Use the example of a mixture of ethane and heptane to illustrate your..
At a pressure of 10 bar, determine the bubble and dew point of a mixture of hydrocarbons, composition, mol%: n-butane 21, n-pentane 48, n-hexane 31. The equilibrium K factors can be estimated using the De Priester charts in Dadyburjor (1978) or fo..
A Carnot cycle operating between 600 °C and 25 °C absorbs 1000 kJ of heat from the high-temperature reservoir. The work produced is used to power another Carnot cycle which transfers 1000 kJ of heat from 600 °C to a reservoir at higher temperature..
Plot the fraction of ferrite, austenite, and cementite in equilibrium alloy containing (a) 0.6% C (b) 0.8% C and (c) 1.2% C as a function of temperature (25 C to 1400 C). What is the percentage of pearlite (eutectoid) in the above three cases at ro..
question 1a handling operations for solidpowder substances are often a source of dust generation and are a source of
The pressure of a sample of gas at a constant temperature of 25 degrees C is increased from 1.0 atm to 1.2 atm. If the original volume was 3.8 liters, what will the new volume be?
question 1 a using appropriate data sources to be cited correctly make a reasonably accurate sketch or graph of a
Determine the percentage reduction in the applied voltage (i.e., the percentage tap on the autotransformer).
compare the compound amount accumulated at the end of 10 years
Sulfuric acid solution 98% by weight is known to have a specific gravity of 1.84. H2S04 concentration declared 98% of the weight of the a.pound H2S04 per ft ^ 3 solution
Develop the four equations and describe the meaning of each term.
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