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.Management Sciences
A. is always present
B. is always absent
C. may be sometimes present
D. none of the above
Related Mcqs:
- Copper brushes in D.C. machine are used_____________?
- A. where low voltage and high currents are involved B. where high voltage and small cur-rents are involved C. in both of the above cases D. in none of the above cases...
- Iron losses in a D.C. machine are independent of variations in______________?
- A. speed B. load C. voltage D. speed and voltage...
- For a D.C. machines laboratory following type of D.C. supply will be suitable___________?
- A. rotary converter B. mercury are rectifier C. induction motor D.C. generator set D. synchronous motor D.C. generator set...
- For the parallel operation of two or more D.C. compound generators, we should ensure that_______________?
- A. voltage of the incoming generator should be same as that of bus bar B. polarity of incoming generator should be same as that of bus bar C. all the series fields should be run in parallel by means of equilizer connection D. series fields of all generators should be either on positive side or … For the parallel operation of two or more D.C. compound generators, we should ensure that_______________?Read More...
- Armature reaction in a generator results in_____________?
- A. demagnetisation of leading pole tip and magnetisation of trailing pole tip B. demagnetisation of trailing pole tip and magnetisation of leading pole tip C. damagnetising the center of all poles D. magnetising the center of all poles...
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