DC GENERATOR 2

Create an image of a DC generator in a workshop setting, showing various components like commutators, windings, and pole shoes, with a background of electrical schematics and diagrams.

DC Generator Fundamentals Quiz

Test your knowledge on DC generators with this engaging quiz! Dive into the world of electrical engineering and enhance your understanding of crucial concepts related to DC generators.

Key Topics Covered:

  • Insulating materials
  • Winding types
  • Commutation and polarity
  • Magnetic fields and armature reactions
10 Questions2 MinutesCreated by CoilingCircuit512
11. The insulating material used between the commutator segments is normally _________
Graphite
Paper
Mica
Insulating varnish
12. For generating large currents on D.C.generators, which winding is generally preferred?
progressive wave winding
Lap winding
Retrogressive wave winding
Wave winding
13. The polarity of a D.C.generator can be reversed by ____________
Reversing the field current
Increasing the field current
Reversing the field current as direction of rotationwell as the
Any of the above
14. Welding generator will have ____________
Lap winding
Wave winding
Delta winding
Duplex wave winding
15. In case of D.C.machine winding, number of commutator segments is equal to ________
Number of armature coils
Number of armature coil sides
Number of armature conductors
Number of turns
16. The function of pole shoes in the case of D.C.machine is _____________
To reduce the reluctance of the magnetic path
To spread out the flux to achieve uniform flux density
To support the field coils
To discharge all the above functions
17. The demagnetizing component of armature reaction in a D.C.generator __________
Reduces generator emf
Decreases armature speed
Reduces interpole flux density
Results in sparking trouble
18. Magnetic field in a self excited D.C.generator is produced by _____________
Electro magnet
permanent magnet
Bith A & B
All of the above
19. Compensating windings are used in generators ____________
Mainly to reduce the eddy currents by providing local short circuits
To provide path for circulation of cooling air
To neutralise the cross magnetising effect of the armature reacation
None of the above
20. In D.C.generators, lap winding is used for _____________
High voltage ,high current
Low voltage, high current
High voltage , low current
Low voltage, low current
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