MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 4 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. |
In a DC motor, the commutator serves as a ___________ |
| A. | mechanical rectifier for alternating EMF to direct EMF |
| B. | mechanical inverter to invert the direct applied voltage to alternating voltage |
| C. | all of the mentioned |
| D. | none of the mentioned |
| Answer» C. all of the mentioned | |
| 2. |
In a DC generator, the commutator serves as a _________ |
| A. | mechanical rectifier for alternating EMF to direct EMF |
| B. | mechanical inverter to invert the direct applied voltage to alternating voltage |
| C. | all of the mentioned |
| D. | none of the mentioned |
| Answer» B. mechanical inverter to invert the direct applied voltage to alternating voltage | |
| 3. |
In larger DC machines, the reason behind using fabricated steel instead of cast iron in the manufacture of yoke is? |
| A. | economical considerations |
| B. | permeability considerations |
| C. | mechanical considerations |
| D. | insulation considerations |
| Answer» C. mechanical considerations | |
| 4. |
In a synchronous generator, the frequency of the generated EMF depends on ___________ |
| A. | rotational speed |
| B. | poles |
| C. | both rotational speed and poles |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |