MCQOPTIONS
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MCQOPTIONS
This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Dc Machines knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In shunted rheostatic armature control method ______________ |
| A. | Variable resistor is added in parallel with armature |
| B. | Variable resistor is added in series with armature |
| C. | Variable resistor is added in parallel with armature and another variable resistor is added in series |
| D. | Variable resistor is not added in whole circuit |
| Answer» D. Variable resistor is not added in whole circuit | |
| 2. |
Speed regulation of armature series control method is __________ |
| A. | Very good |
| B. | Zero |
| C. | Poor |
| D. | Cannot comment |
| Answer» D. Cannot comment | |
| 3. |
Consider the armature control method, where 10 resistance is connected in series with armature in first case. For second case resistance value is changed 100 . Then ____________ |
| A. | Speed-torque characteristic of both will start from same point |
| B. | For first case speed-torque characteristic will start below to the case 2 |
| C. | For first case speed-torque characteristic will start above to the case 2 |
| D. | Can t say because other parameters are unavailable |
| Answer» B. For first case speed-torque characteristic will start below to the case 2 | |
| 4. |
By series armature resistance method, we can get _________________________ |
| A. | Speed above rated speed |
| B. | Speed equal to rated speed |
| C. | Speed below rated speed |
| D. | All speeds are possible |
| Answer» D. All speeds are possible | |
| 5. |
For which speed control method we get minimum efficiency? |
| A. | Voltage control method |
| B. | Field control method |
| C. | Armature control method |
| D. | Cannot be determined |
| Answer» D. Cannot be determined | |