Engineering, 04.04.2020 00:53, nickddj12
A 10-kVA, 480/120-V, 1-Φ transformer is to be used as an autotransformer to transform a 600-V source to a 480-V supply. As a 1-Φ transformer delivering rated load at 0.90 power factor lagging, its efficiency is 0.96%a. show the connection diagram of an autotransformerb. determine the KVA rating as an autotranformerc. find the efficiency as an autotransformer deliverling rate capacity at 480 V and 0.80 power facing lagging
Answers: 3
Engineering, 04.07.2019 18:10, ahmedeldyame
Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.
Answers: 1
Engineering, 04.07.2019 18:20, ashleyjaslin
Derive the correction factor formula for conical nozzle i=-(1+ cosa) and calculate the nozzle angle correction factor for a nozzle whose divergence hal-fangle is 13 (hint: assume that all the mass flow originates at the apex of the cone.
Answers: 3
A 10-kVA, 480/120-V, 1-Φ transformer is to be used as an autotransformer to transform a 600-V source...
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