A. there is no load on|he generator
B. the generator runs on full load
C. the generator runs on overload
D. the generator runs on designed speed
Related Mcqs:
- If brushes of a D.C. generator are moved in order to bring these brushes in magnetic neutral axis, there will be________________?
A. demagnetisation only
B. cross magnetisation as well as mag¬netisation
C. crossmagnetisation as well as demagnetising
D. cross magnetisation only - Two generators A and B have 6-poles each. Generator A has wave wound armature while generator B has lap wound armature. The ratio of the induced e.m.f. is generator A and B will be_______________?
A. 2 : 3
B. 3 : 1
C. 3 : 2
D. 1 : 3 - Which of the following components of a D.C, generator plays vital role for providing direct current of a D.C. generator ?
A. Dummy coils
B. Commutator
C. Eye bolt
D. Equilizer rings - The e.m.f. generated by a shunt wound D.C. generator isE. Now while pole flux remains constant, if the speed of the generator is doubled, the e.m.f. generated will be_______________?
A. E/2
B. 2E
C. slightly less than E
D. E - Magnetic field in a D.C. generator is produced by_______________?
A. electromagnets
B. permanent magnets
C. both A. and B.
D. none of the above - Welding generator will have____________?
A. lap winding
B. wave winding
C. delta winding
D. duplex wave winding - In a D.C. generator the critical resistance refers to the resistance of_____________?
A. brushes
B. field
C. armature
D. load - In a D.C. generator in case the resistance of the field winding is increased, then output voltage will____________?
A. increase
B. decrease
C. remain unaffected
D. fluctuate heavily - In a D.C. generator the number of mechanical degrees and electrical degrees will be the same when____________?
A. r.p.m. is more than 300
B. r.p.m. is less than 300
C. number of poles is 4
D. number of poles is 2 - In a separately excited generator supplying rated load the armature reaction.
A. is always present
B. is always absent
C. may be sometimes present
D. none of the above
