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A large 3-phase, 4000 V, 60 Hz, squirrel-cage induction motor draws a current of 385 A and a total active power of 2344kW when operating at full-load. The corresponding speed is accurately measured and is found to be 709.2 r/min. The stator is connected in star (wye) and the resistance between two stator terminals is 0.10 ?. The total iron losses are 23.4 kW and the windage and friction losses12kW. Calculate the following: A) Power factor at full load. B) Active power supplied to the rotor. C) Total I²R losses in the rotor. D) The load mechanical power (kW) and torque (kN.m)
the track for a racing event was designed so that riders jump off the slope at 30 degrees from a height of 5 ft. the
Consider a 1.25 cm diameter carbon steel (1% C, k = 40 W/m-K) sphere to be cooled from 500oC to 100oC by a cooling air flow at 25oC with convection coefficient of 110 W/m2-K.
a piston-cylinder initially contains 2.52 kg saturated liquid water at 200 degrees celcius. now heat is transferred to
steam enters an insulated turbine at 100 bar 400oc. at the exit the pressure and quality are 200 kpa and 0.66
water is syphoned from the container to a lower place. the flexible hose has a constant diameter and the location
Flow rate transmitter specifications are given as following: Input range: 0 to 300 GPM (Gallons Per Minute) Output range: -5V to 5V. If this transmitter needs to be connected to an A/D converter and the requirement is to detect at least 0.25 GPM diff..
the hawkins supply company is currently faced with an inventory rotation problem.this difficulty stems from the fact
Consider a system consisting of liquid water initially at T1 = 318 K, p1 = 3.5 bar undergoing a process to a final state at T2 = 353 K, p2 = 1.5 bar. Use appropriate equation with the data from the table to evaluate change in specific entropy.
the masses of the bar and the disk are 5 kg and 10 kg respectively. the coefficient of kinetic frictionnbspbetween the
a brayton cycle gas turbine delivers power to an electric generator at 150 mw. the minimum nbsptemperature in the cycle
a pump fitted with 50mm bore ball bearings uses an oil whose viscosity ranges from 100cst at cold pump start-up to
two dimensional steady state conduction occurs in a hollow cylindrical solid of thermal conductivity k 16wmk outer r -
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