MCQOPTIONS
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MCQOPTIONS
This section includes 13 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. |
Why No-load or load characteristics are also called as magnetization characteristics? |
| A. | E<sub>a</sub> I<sub>f</sub> |
| B. | E<sub>a</sub> |
| C. | I<sub>f</sub> |
| D. | Cannot be determined |
| Answer» C. I<sub>f</sub> | |
| 2. |
OCC is drawn at two different speeds both less than rated speed. OCC drawn at speed N1 lies below OCC drawn at speed N2. Which of the following relation is correct? |
| A. | N2 = N1 |
| B. | N2 < N1 |
| C. | N2 >> N1 |
| D. | Can t comment |
| Answer» D. Can t comment | |
| 3. |
Load characteristics drawn at Ra =0 and Ra not equal to 0, will lie _____ |
| A. | Above |
| B. | On |
| C. | Below |
| D. | Intersecting |
| Answer» D. Intersecting | |
| 4. |
If load characteristics are drawn on OCC itself, we get curve ________ |
| A. | Above OCC |
| B. | On OCC |
| C. | Below OCC |
| D. | Intersecting OCC |
| Answer» D. Intersecting OCC | |
| 5. |
Ea can be determined using __________ |
| A. | No-load characteristics |
| B. | Load characteristics |
| C. | Cannot be determined |
| D. | Above OCC |
| Answer» B. Load characteristics | |
| 6. |
If suppose OCC is conducted at speed n1, where n1< nrated, OCC will lie ____________ |
| A. | Above OCC at nrated |
| B. | On OCC at nrated |
| C. | Below OCC at nrated |
| D. | Can t comment by only speed information |
| Answer» D. Can t comment by only speed information | |
| 7. |
Air gap line is drawn at iron _________ |
| A. | Saturated |
| B. | Unsaturated |
| C. | Moderately saturated |
| D. | Variable saturation |
| Answer» C. Moderately saturated | |
| 8. |
While conducting OCC, in order to avoid hysteresis loop, in which direction If should be increased? |
| A. | -ve direction |
| B. | +ve direction |
| C. | In any direction |
| D. | In both direction there exists hysteresis loop |
| Answer» C. In any direction | |
| 9. |
In an OCC at If =0, graph starts from origin. |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
Characteristics of a DC generator drawn across Vt vs If at rated armature current and constant speed, is called as ____________ |
| A. | Load characteristics |
| B. | No-load characteristics |
| C. | External characteristics |
| D. | Armature characteristics |
| Answer» B. No-load characteristics | |
| 11. |
Open circuit characteristics (OCC) is generally drawn across __________ |
| A. | E<sub>a</sub> vs I<sub>f</sub>, I<sub>a</sub>=constant (not equal to rated) |
| B. | E<sub>a</sub> vs I<sub>f</sub>, I<sub>a</sub>=0 |
| C. | E<sub>a</sub> vs I<sub>f</sub>, I<sub>a</sub>=constant |
| D. | E<sub>a</sub> vs I<sub>f</sub>, I<sub>a</sub>=constant (rated) |
| Answer» C. E<sub>a</sub> vs I<sub>f</sub>, I<sub>a</sub>=constant | |
| 12. |
Characteristics drawn at Ia = 0 is also called as ____________ |
| A. | Magnetization characteristics |
| B. | Non-magnetization characteristics |
| C. | Anti-magnetization characteristics |
| D. | Cannot be determined |
| Answer» B. Non-magnetization characteristics | |
| 13. |
Which of the following is not the operating characteristics of Dc generator? |
| A. | No-load characteristics |
| B. | Load characteristics |
| C. | External characteristics |
| D. | Internal characteristics |
| Answer» E. | |