Electrical Machines Circle Diagrams Induction Machines Online Exam Quiz
Electrical Machines Circle Diagrams Induction Machines GK Quiz. Question and Answers related to Electrical Machines Circle Diagrams Induction Machines. MCQ (Multiple Choice Questions with answers about Electrical Machines Circle Diagrams Induction Machines
A 10kW, 50 Hz, 3-phase induction motor develops the rated torque at 1440rpm. If the load torque is reduced to half, then the motor speed is?
Options
A : 1470rpm
B : 1410rpm
C : 1400rpm
D : 1444rpm
A 10kW, 50 Hz, 3-phase induction motor develops the rated torque at 1440rpm. If the load torque is reduced to half, then the power output that can now be obtained is?
Options
A : 5 kW
B : 5.3 KW
C : 4.6 kW
D : 8 kW
Use the below circle diagram to choose the correct option.
Options
A : CF: Rotor copper loss, FG: Stator copper loss, GE: Fixed losses.
B : FG:Rotor copper loss, CF: Stator copper loss, GE: Fixed losses.
C : GE:Rotor copper loss, FG: Stator copper loss, CF: Fixed losses.
D : FG:Rotor copper loss, CF: Stator copper loss, CF: Core losses.
If the no load test is conducted at its rated frequency but less than the rated voltage, then the mechanical losses will _____ and the constant losses will _________
Options
A : constant, reduce
B : constant, rise
C : reduce, rise
D : constant, constant
No load power factor of the induction motor will __________ if the no load test is conducted at its rated frequency but less than the rated voltage.
Options
A : improve
B : degrade
C : remain same
D : none of the mentioned
Circle diagram of an induction motor is graphical representation of ____________
Options
A : its equivalent circuit
B : its rotor equivalent
C : its stator equivalent
D : its stationary equivalent circuit
Blocked rotor test is conducted to find the ____________
Options
A : leakage impedance
B : leakage reactance
C : stator impedance
D : rotor impedance
In the below circle diagram, OG represents?
Options
A : Rated torque
B : Maximum torque
C : Rated power output
D : Losses
If the no load test is conducted at its rated frequency but less than the rated voltage, then the wattmeter reading will be ____________
Options
A : reduced
B : more than previous reading
C : remain same
D : none of the mentioned
Circle diagram depicts the relation between ____________
Options
A : stator current and the slip variation
B : rotor current and stator current
C : slip variation and the power factor
D : slip variation and the losses of the machine
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