Electrical Machines Machine Applications Online Exam Quiz
Electrical Machines Machine Applications GK Quiz. Question and Answers related to Electrical Machines Machine Applications. MCQ (Multiple Choice Questions with answers about Electrical Machines Machine Applications
A synchronous motor absorbing 60 kW is connected in parallel with an continuous load of 240 kW operating at 0.8 power factor lag.What is the kVAR supplied by the synchronous motor to obtain a total power factor of 0.9 lagging?
Options
A : 35, leading
B : 35, lagging
C : 145, leading
D : None of the mentioned
The dc series generator is employed as ____________
Options
A : a booster to maintain constant voltage at the end of the feeder
B : for supplying traction load
C : for battery bank charging
D : none of the mentioned
A 3-phase synchronous alternator is connected to the infinite bus is over excited, that corresponds to ______________
Options
A : capacitor
B : inductor
C : variable inductor
D : any of the mentioned
_______ generator is used in arc welding purposes.
Options
A : Differential compound dc
B : Dc series
C : Cumulative compounded dc
D : Shunt
The most widely used application of ac series motor is ____________
Options
A : electric traction upto 1600 kW
B : paper mills
C : welding
D : none of the mentioned
Synchronous-induction coupled motors are required for ____________
Options
A : high starting torque applications
B : high pull out torque applications
C : high running torques applications
D : none of the mentioned
Which of the following can be used for braking purposes in electric trains?
Options
A : Induction generator
B : Induction motor
C : Dc series motor
D : Dc differentially compounded generator
If it asked by the customer to provide tappings on the transformer, the most efficient and economical way to provide it at ____________
Options
A : middle of hv winding
B : phase end of hv winding
C : neutral end of hv winding
D : middle of lv winding
An alternator is to be used for generation purpose in an aircraft. The most suited operating frequency of the alternator should be ____________
Options
A : of 400 Hz to remove extra bulk
B : of 400 Hz to reduce losses
C : of 50 Hz to remove extra bulk
D : none of the mentioned
Universal motor is used in vacuum cleaners, table fans and portable drilling machine.
Options
A : True
B : False
C :
D :
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