Uma carga elétrica trifásica equilibrada cuja impedância ZAB=10+j15 Ω está ligada em triângulo e é alimentada por um gerador trifásico equilibrado por meio de condutores cuja impedância é desprezível. A sequência de fase do gerador é ABC e a tensão de linha VAB é igual 380 V fase zero. A corrente de linha IA e de fase IAB valem: A) 48,76<-16,90 A; 16,25<-46,90 A B) 36,51<-86,31 A; 12,17<-56,31 A C) 36,51<-86,31 A; 21,08<-56,31 A D) 63,24<-86,31 A; 21,08<-56,31 A E) 36,51<-56,31 A; 12,17<-86,31 A

Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise

Agas contained within a piston-cylinder assembly e end nation about same energy states, 1 and 2, where pi 10 bar, v undergoes two processes, a and b, between the sam 0.1 m3, ui-400 kj and p2 1 bar, v2 1.0 m2, u2 200 kj: process a: process from 1 to 2 during which the pressure- volume relation is pv constant process b: constant-volume process from state 1 to a pressure of 2 bar, followed by a linear pressure-volume process to +20 0 state 2 kinetic and potential energy effects can be ignored. for each of the processes a and b, (a) sketch the process on p-v coordinates, (b) evaluate the work, in kj, and (c) evaluate process the heat transfer, in kj

Aseries piping system conveys methyl alcohol. the system consists of 70 m of 1- nominal pipe follow by 50 m of 2-nominal pipe, both schedule 40 commercial steel. the 1-nominal pipe contains 3 90° elbows (regular) anda fully open gate valve, all threaded. the pressure drop through the system is 150 kpa. determine the volume flow rate through the system that is horizontally laid.