Electrical Machines Entrance Exams Online Exam Quiz
Electrical Machines Entrance Exams GK Quiz. Question and Answers related to Electrical Machines Entrance Exams. MCQ (Multiple Choice Questions with answers about Electrical Machines Entrance Exams
The given variable losses are 5kW fr a 500 KVA, 11 kV, 3-phase star connected alternator having armature resistance of 4 ohms. Calculate the current at which maximum efficiency occurs?
Options
A : 20.4A
B : 10.2A
C : 40A
D : 26A
The given variable losses are 5kW fr a 500 KVA, 11 kV, 3-phase star connected alternator having armature resistance of 4 ohms. Calculate the full load armature current per phase.
Options
A : 26.24 A
B : 20.41 A
C : 79 A
D : 40 A
The reactive power output of a synchronous generator is limited by _________
Options
A : armature current and field current
B : field current and load angle
C : load angle and excitation
D : armature current only
The short circuit load losses is/are ______________
Options
A : direct load loss and stray load losses
B : direct load loss
C : stray load losses
D : field current loss
In a 3-phase cylindrical-rotor alternator, synchronous reactance is sum of _____________
Options
A : mutual and leakage reactance
B : magnetizing and leakage reactance
C : magnetizing and mutual reactance
D : mutual, magnetizing and leakage reactance
A synchronous machine with its field winding on rotor and polyphase armature winding on stator. At steady state running condition, its air gap field is?
Options
A : rotating at synchronous speed w.r.t. stator
B : stationary w.r.t. rotor
C : rotating in the direction of the rotor rotor rotation
D : all of the mentioned
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