DC Generator

DC Machine Commutation MCQ || DC Machine Commutation Questions and Answers

DC machine, DC Generator, DC Motor, MCQ / By

1. In DC generator on load, the air-gap flux distribution in space is Sinusoidal Triangular Pulsating Flat-topped   2. To speed up the commutation process ______ must be neutralized. Reactance Voltage Armature current Field Current Armature Reactance   3. In DC machine time of commutation decreases with: Increase in width of commutator segment Increase in …

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DC Generator EMF Equation MCQ || DC Generator EMF Equation Questions and Answers

DC Generator, MCQ / By

1. The emf equation of DC generator is E Øp/nza Øp60/nza Øpa/60nz Øpnz/60a   2. A 220 V separately excited dc motor takes 20 A and the armature resistance is 1.0 Ω. If the armature constant KaΦ = 1.5 rad/sec, the speed of the motor is 1000 rpm 2000/π  rpm 3000/π  rpm 4000/π rpm   …

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DC Motor Speed Control MCQ || DC Motor Speed Control Questions and Answers

DC Generator, MCQ / By

1. The PWM control of DC motor varies _________ Linearly with speed Inversely with speed Parabolically with speed Exponentially with speed   2. In which of the following method, the effect of armature reaction is more? Field weakening method Armature resistance control Same in both methods Cannot be determined   3. Ward-Leonard system of speed …

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