Questões de Concurso Público DCTA 2013 para Tecnico em Elétrica
Foram encontradas 47 questões
Q2883750
Engenharia Elétrica
A four poles, three-phase, doubly-feed induction motor has its rotor winding terminals left unconnected. A three-phase symmetrical power source, with 220,0 [V] and 60,0 [Hz], is suddenly connected to the machine stator electrical terminals at standstill, resulting in line currents with 5,0 [A] of magnitude, lagging the stator voltages for almost 90,0 degrees in each phase.
O texto ilustra a ligação à rede trifásica de alimentação de uma máquina
Q2883754
Inglês
A logic circuit has three boolean inputs and one output named A, B, C and S respectively. The boolean input A is connected to an inverter gate, and its result is submitted to an AND gate, along with the input signal B. The AND gate output is then submitted to an OR gate along with the remaining boolean input C. The output of the OR gate is the resulting signal S.
De acordo com o texto, o circuito lógico possui
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