MCQOPTIONS
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MCQOPTIONS
This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Machines knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Mark the order for the decreasing order of the voltage regulation for dc generators. |
| A. | DC shunt generator > level compound generator > Differential compound generator |
| B. | DC shunt generator < level compound generator < Differential compound generator |
| C. | Level compound generator > DC shunt generator > Differential compound generator |
| D. | Level compound generator < DC shunt generator < Differential compound generator |
| Answer» B. DC shunt generator < level compound generator < Differential compound generator | |
| 2. |
The delay of the commutation occurs due base cause of emf induced due to _________ |
| A. | self inductance, mutual inductance |
| B. | self inductance |
| C. | mutual inductance |
| D. | leakage inductance |
| Answer» B. self inductance | |
| 3. |
Interpoles provide mmf more than armature mmf in a dc machine. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
Amplidynes are best applicable in _________ |
| A. | feedback control systems with regulated power supply. |
| B. | power supply |
| C. | speed control of large motors |
| D. | All of the mentioned |
| Answer» B. power supply | |
| 5. |
In amplidynes, the resultant d-axis flux is _________ |
| A. | field flux |
| B. | difference of field flux and main flux |
| C. | sum of field flux and main flux |
| D. | cross magnetizing flux |
| Answer» B. difference of field flux and main flux | |
| 6. |
An amplidyne, d-axis flux is always neutralized due to _________ |
| A. | compensating winding at all possible loads |
| B. | interpoles at all specified loading |
| C. | feedback at all possible loads |
| D. | feedback at fixed loading |
| Answer» B. interpoles at all specified loading | |
| 7. |
In cross field rotating amplifiers, there is _________ |
| A. | two stage of flux generators |
| B. | three stage of flux generators |
| C. | four stage of flux generators |
| D. | eight stage of flux generators |
| Answer» B. three stage of flux generators | |
| 8. |
The cross field machines have _________ |
| A. | two fluxes electrically in quadrature |
| B. | two fluxes mechanically in quadrature |
| C. | one set of brushes per pole |
| D. | all of the mentioned |
| Answer» B. two fluxes mechanically in quadrature | |
| 9. |
The ordinary dc machines are not favourable as amplidynes due to _________ |
| A. | sluggish transient response |
| B. | low stability |
| C. | poor gain |
| D. | high steady state error |
| Answer» B. low stability | |
| 10. |
The quantity which make rotating amplifier applicable in large power levels is/are _________ |
| A. | high power gain and favourable transient conditions |
| B. | favourable transient conditions |
| C. | high power gain |
| D. | favourable steady state conditions |
| Answer» B. favourable transient conditions | |
| 11. |
The rotating amplifiers are widely used in ____________ |
| A. | small amplified outputs |
| B. | large amplified outputs |
| C. | amplified outputs |
| D. | large power gain outputs |
| Answer» C. amplified outputs | |