Synchronous Motors Mcqs
Synchronous Motors Mcqs, this topic has 122 mcqs, It takes five to ten minutes to complete this free Synchronous Motors Mcqs test. You will see 4 or 5 option of each question. You must choose / think only one option and then press on answer key for check right answer. Practice "Synchronous Motors Mcqs" MCQs and share with your friends, brothers, sisters.
Synchronous Motors Mcqs (Total Quiz: 122)
MCQ: The construction of a synchronous motor resembles____________?
- a series motor
- an induction motor
- an alternator
- a rotary converter
C
MCQ: For power factor correction, synchronous motors operate at____________?
- no-load and greatly over-excited fields
- no-load and under-excited fields
- normal load with minimum excitation
- normal load with zero excitation
A
MCQ: Which of the following losses is not dissipated by the stator core surface in a synchronous motor?
- Eddy current losses in the conductors
- Iron losses in the stator
- Copper losses in the slot portion of the conductors
- Windage losses
- None of the above
D
MCQ: The size of a synchronous motor decreases with the increase in___________?
- flux density
- horse power rating
- speed
- all of the above
A
MCQ: Which of the following losses, in a synchronous motor, does not vary with load?
- Windage loss
- Copper losses
- Any of the above
- None of the above
A
MCQ: In a synchronous motor, the armature current has large values for____________?
- high excitation only
- low excitation only
- both high and low excitation
- none of the above
C
MCQ: The back e.m.f. in the stator of a synchronous motor depends on____________?
- number of poles
- flux density
- rotor speed
- rotor excitation
- none of the above
D
MCQ: If the field of a synchronous motor is underexcited, the power factor will be_____________?
- zero
- unity
- lagging
- leading
C
MCQ: In a synchronous motor, the damping winding is generally used to______________?
- reduce noise level
- reduce the eddy currents
- provide starting torque only
- prevent hunting and provide the starting torque
- none of the above
D
MCQ: In a synchronous motor it the back e.m.f. generated in the armature at noload is approximately equal to the applied voltage, then
- the motor is said to be fully loaded
- the torque generated is maximum
- the excitation is said to be zero per cent
- the excitation is said to be hundred per cent
D