The power factor of an alternator depends on: Speed of rotor Core losses Armature losses Connected Load Correct answer: 4. Connected load Explanation: Statement: Identify the parameter on which the power factor of an alternator depends The power factor of an alternator depends on the connected load.
The alternator is an electromagnetic generator: True False Correct answer: 1. True
Voltage regulation of an alternator when connected to inductive load: Positive Negative Zero None of these Correct answer: 1. Positive Formula for Voltage Regulation: Whenever some inductive load is added to the alternator (AC generator) the terminal voltage decreases. In simple words for lagging (inductive or loads having +Q) are added to generator the V(FL) … Read more
Voltage regulation of an alternator when connected to capacitive load: Positive Negative Zero None of these Correct answer: 2. Negative
In which type of network the lowest critical frequency is due to pole: RL RC LC Any of above Correct answer: 2. RC
The Tachometer is added to servomechanism because: It reduces damping It converts shaft velocity to dc voltage It changes loci None of these Correct answer: 2. It converts shaft velocity to dc voltage
If K is varied from -infinity to 0 it is known as: Positive root locus Direct root locus Inverse root locus Max root locus Correct answer: 3. Inverse root locus
If K is varied from 0 to +infinity it is known as: Positive root locus Direct root locus Inverse root locus Max root locus Correct answer: 2. Direct root locus More MCQs on Control System
Which one of the following provides excellent transient system and steady state response: Proportional + Integral action Proportional + Differential action Differential + Integral action Proportional + Differential + Integral Correct answer: 4. Proportional + Differential + Integral Proportional term: The proportional terms produces output value that is proportional to the error value. The response … Read more
A system having gain margin close to unity or a phase margin close to zero is: Oscillatory Stochastic Relatively Stable Analytic Correct answer: 3. Relatively Stable