MCQOPTIONS
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MCQOPTIONS
This section includes 3 Mcqs, each offering curated multiple-choice questions to sharpen your Power Systems knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Voltage distribution across disc of strings of suspension insulator assembly is ______ |
| A. | same for all disks |
| B. | maximum for unit nearest to the line |
| C. | maximum for unit nearest to the tower |
| D. | equal to transmission line voltage rating |
| Answer» C. maximum for unit nearest to the tower | |
| 2. |
If a string of suspension insulator has three units, each can withstand a maximum 11 KV and total string can withstand 25.76 KV. What is the string efficiency? |
| A. | 234.1% |
| B. | 46.3% |
| C. | 68.75% |
| D. | 78% |
| Answer» E. | |
| 3. |
What is the most common cause of failure of overhead line insulators? |
| A. | Flashover |
| B. | Mechanical stress |
| C. | Porosity of materials |
| D. | Improper vitrification |
| Answer» B. Mechanical stress | |