MCQOPTIONS
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MCQOPTIONS
This section includes 209 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
In case of a double cage induction motor, the inner cage has |
| A. | high inductance arid low resistance |
| B. | low inductance and high resistance |
| C. | low inductance and low resistance |
| D. | high inductance and high resistance |
| Answer» B. low inductance and high resistance | |
| 202. |
The secondary winding of which of the following transformers is always kept closed? |
| A. | Step-up transformer |
| B. | Step-down transformer |
| C. | Potential transformer |
| D. | Current transformer |
| Answer» E. | |
| 203. |
Reduction in core losses and increase in permeability are obtained with transformer employing |
| A. | core built-up of laminations of cold rolled grain oriented steel |
| B. | core built-up of laminations of hot rolled sheet |
| C. | either of the above |
| D. | none of the above |
| Answer» B. core built-up of laminations of hot rolled sheet | |
| 204. |
The magnetising current of a transformer is usually small because it has |
| A. | small air gap |
| B. | large leakage flux |
| C. | laminated silicon steel core |
| D. | fewer rotating parts |
| Answer» B. large leakage flux | |
| 205. |
Spacers are provided between adjacent coils |
| A. | to provide free passage to the cooling oil |
| B. | to insulate the coils from each other |
| C. | both (A) and (B) |
| D. | none of the above |
| Answer» B. to insulate the coils from each other | |
| 206. |
Which of the following parts of a transformer is visible from outside? |
| A. | Bushings |
| B. | Core |
| C. | Primary winding |
| D. | Secondary winding |
| Answer» B. Core | |
| 207. |
A no-load test is performed on a transformer to determine |
| A. | core loss |
| B. | copper loss |
| C. | efficiency |
| D. | magnetising current |
| E. | magnetising current and loss |
| Answer» F. | |
| 208. |
The noise produced by a transformer is termed as |
| A. | zoom |
| B. | hum |
| C. | ringing |
| D. | buzz |
| Answer» C. ringing | |
| 209. |
The leakage flux in a transformer depends upon |
| A. | load current |
| B. | load current and voltage |
| C. | load current, voltage and frequency |
| D. | load current, voltage, frequency and power factor |
| Answer» B. load current and voltage | |