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 dynamic braking, when braking is applied system acts as ___________ |
| A. | Freely running machine |
| B. | Motor with slow speed |
| C. | Generator |
| D. | Motor with same speed in opposite direction |
| Answer» D. Motor with same speed in opposite direction | |
| 2. |
Braking time in the dynamic braking is the function of _____________ |
| A. | System inertia |
| B. | Load torque |
| C. | Motor rating |
| D. | All- system inertia, load torque and motor rating |
| Answer» E. | |
| 3. |
Plugging is used in ____________ |
| A. | Small motors only |
| B. | Small and medium powered |
| C. | Only in large heavy machines |
| D. | Everywhere |
| Answer» B. Small and medium powered | |
| 4. |
Plugging is applied in a motor, if we don’t make the switch OFF what will happen? |
| A. | Motor will come to rest as a result of plugging |
| B. | Motor will come to rest and will start rotating in another direction |
| C. | Motor will burn |
| D. | Nothing will happen |
| Answer» C. Motor will burn | |
| 5. |
Electrical braking of any variety becomes less effective as ________________ |
| A. | Speed increases |
| B. | Speed decreases |
| C. | Independent of speed |
| D. | Depends on supply voltage |
| Answer» C. Independent of speed | |