MCQOPTIONS
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MCQOPTIONS
This section includes 9 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. |
Applications demanding large applications at starting and small torque while running use DC series motor. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
In a DC series motor, if the armature current is halved, the torque of the motor will be equal to |
| A. | 100% of the previous value |
| B. | 50% of the previous value |
| C. | 25% of the previous value |
| D. | 10% of the previous value |
| Answer» D. 10% of the previous value | |
| 3. |
The speed of a DC series motor is ___________ |
| A. | Proportional to field current |
| B. | Proportional to the square of the armature current |
| C. | Proportional to the armature current |
| D. | Inversely proportional to the armature current |
| Answer» E. | |
| 4. |
In which of the following applications DC series motor is invariably tried? |
| A. | Starter for a car |
| B. | Drive for a water pump |
| C. | Fan motor |
| D. | Home appliances |
| Answer» B. Drive for a water pump | |
| 5. |
Which of the following DC motor can be used at conveyors?a) Series motorb) Shunt motorc) Differentially compound motord) Cumulative compound motor 6.Which statement is correct about DC series motor? |
| A. | Series motorb) Shunt motorc) Differentially compound motord) Cumulative compound motor 6.Which statement is correct about DC series motor?a) Has its field winding consisting of thick wire and more turns |
| B. | Shunt motorc) Differentially compound motord) Cumulative compound motor 6.Which statement is correct about DC series motor?a) Has its field winding consisting of thick wire and more turnsb) Has a poor torque |
| C. | Differentially compound motord) Cumulative compound motor 6.Which statement is correct about DC series motor?a) Has its field winding consisting of thick wire and more turnsb) Has a poor torquec) Can be started easily without load |
| D. | Cumulative compound motor 6.Which statement is correct about DC series motor?a) Has its field winding consisting of thick wire and more turnsb) Has a poor torquec) Can be started easily without loadd) Has its field winding consisting of thick wire and less turnsView Answer |
| Answer» B. Shunt motorc) Differentially compound motord) Cumulative compound motor 6.Which statement is correct about DC series motor?a) Has its field winding consisting of thick wire and more turnsb) Has a poor torque | |
| 6. |
The direction of rotation of a DC series motor shaft can be changed by _____________ |
| A. | Interchanging supply terminals |
| B. | Interchanging field terminals |
| C. | Not possible |
| D. | Cannot be determined |
| Answer» C. Not possible | |
| 7. |
No-load speed of which of the following DC motor will be highest? |
| A. | Shunt motor |
| B. | Series motor |
| C. | Cumulative compound motor |
| D. | Differentiate compound motor |
| Answer» C. Cumulative compound motor | |
| 8. |
Where compensating winding is provided in case of conductively compensated DC series motor? |
| A. | As separately wound unit |
| B. | In series with armature winding |
| C. | In parallel with armature winding |
| D. | In parallel with field winding |
| Answer» C. In parallel with armature winding | |
| 9. |
DC series motors are used _______________ |
| A. | Where load is constant |
| B. | Where load changes frequently |
| C. | Where constant operating speed is needed |
| D. | High starting speed |
| Answer» E. | |