MCQOPTIONS
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MCQOPTIONS
This section includes 11 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 field s test generator field and motor field are connected in ______________ |
| A. | Series |
| B. | Parallel |
| C. | Alternatively, series and parallel |
| D. | Not connected |
| Answer» B. Parallel | |
| 2. |
Why field test is conducted even if Hopkinson s test is present? |
| A. | Instability of an operation |
| B. | Possibility of run-away speed |
| C. | Both instability and possibility of run-away speed |
| D. | Field test is not conducted |
| Answer» D. Field test is not conducted | |
| 3. |
Hopkinson s test is suitable for ______________ |
| A. | Small machines only |
| B. | Small and medium machines |
| C. | All machines |
| D. | Only large machines |
| Answer» E. | |
| 4. |
Hopkinson s test gives _______________ |
| A. | Combined iron losses of two machines which can be separated |
| B. | Combined iron losses of two machines which can t be separated |
| C. | Doesn t include iron losses |
| D. | Depends on actual setup |
| Answer» C. Doesn t include iron losses | |
| 5. |
For carrying out load test on Hopkinson s test setup _________________ |
| A. | Actual load is needed |
| B. | By changing field currents in two machines load can be changed |
| C. | Can t carry out |
| D. | By changing the armature current test is carried out |
| Answer» C. Can t carry out | |
| 6. |
Hopkinson s test is a regenerative test. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 7. |
What will happen if field current of motor in Hopkinson s test is decreased? |
| A. | Current through motor armature will increase |
| B. | Current through motor armature will decrease |
| C. | Current through motor armature will remain constant |
| D. | Motor armature current can t be determined |
| Answer» B. Current through motor armature will decrease | |
| 8. |
What will happen if field current of generator in Hopkinson s test is increased? |
| A. | Current through motor armature will increase |
| B. | Current through motor armature will decrease |
| C. | Current through motor armature will remain constant |
| D. | Motor armature current cannot be determined |
| Answer» B. Current through motor armature will decrease | |
| 9. |
In Hopkinson s test, two machines are connected in ______________ |
| A. | Series |
| B. | Parallel |
| C. | Can be connected in parallel or series |
| D. | Two machines are not required |
| Answer» C. Can be connected in parallel or series | |
| 10. |
Hopkinson s test requires ____________ |
| A. | One DC machine on which test is carried out |
| B. | Two different DC machines |
| C. | Two identical DC machines |
| D. | Can be worked with one or two machines |
| Answer» D. Can be worked with one or two machines | |
| 11. |
Hopkinson s test of D.C. machines is conducted at _______________ |
| A. | No-load |
| B. | Part load |
| C. | Full-load |
| D. | Overload |
| Answer» D. Overload | |