EE MCQ
EE MCQ
Home
Quiz
Contact Us
Electrical Machines
The function of field regulator in a DC compound motor is to
none of above.
limit the armature current.
control field current.
vary the armature resistance.
none of above.
limit the armature current.
control field current.
vary the armature resistance.
Answer
Download EE MCQ app
Related Question
Electrical Machines
An induction motor having 8 poles runs at 727.5 rpm. If the supply frequency is 50Hz, the emf in the rotor will have a frequency of
51.5Hz
48.5Hz
2.5Hz
1.5Hz
51.5Hz
48.5Hz
2.5Hz
1.5Hz
Answer
Download EE MCQ app
Electrical Machines
In DC generator on no-load, the air gap flux distribution in space is
pulsating.
sinusoidal.
triangular.
flat topped.
pulsating.
sinusoidal.
triangular.
flat topped.
Answer
Download EE MCQ app
Electrical Machines
The introduction of interpoles in between the main poles improves the performance of a dc machine, because
the inequality of air-gap flux on the top and bottom halves of the armature is removed
the flux waveform is improved with reduction in harmonics
the interpoles produce additional flux to augment the developed torque
a counter-emf is induced in the coil undergoing commutation
the inequality of air-gap flux on the top and bottom halves of the armature is removed
the flux waveform is improved with reduction in harmonics
the interpoles produce additional flux to augment the developed torque
a counter-emf is induced in the coil undergoing commutation
Answer
Download EE MCQ app
Electrical Machines
A commutator with a diameter of 50 cm rotating at 1000 rpm. For a brush width of 1.5 cm, find the time of commutation in ms.
0.512.
0.573.
0.443.
0.649.
0.512.
0.573.
0.443.
0.649.
Answer
Download EE MCQ app
Electrical Machines
Find the developed torque DC Series Motor having armature resistance of 0.2 Ω and taking armature current of 60 A is connected to 250 V supply. Considered brush drop of 1 V each.
266.20 N-m.
133.22 N-m
cant be determined.
234.76 N-m.
266.20 N-m.
133.22 N-m
cant be determined.
234.76 N-m.
Answer
Download EE MCQ app
Search
Login here
Google
Download our application
Android
Apple
Follow Us
Facebook
Telegram
Instagram