MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Transformers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Transformers are located ______________ |
| A. | anywhere |
| B. | in the direction of down wind |
| C. | in the direction of up wind |
| D. | can be located in any wind direction according to the application |
| Answer» C. in the direction of up wind | |
| 2. |
The most carried method of attenuation of transformer is ___________ |
| A. | changing core material |
| B. | increasing oil tank size |
| C. | building walls around transformer |
| D. | adding some another fluid in oil tank |
| Answer» D. adding some another fluid in oil tank | |
| 3. |
Main and basic design of the transformer is tested by ___________ |
| A. | routine tests |
| B. | special tests |
| C. | type tests |
| D. | different tests |
| Answer» D. different tests | |
| 4. |
Step-lap is _____________ |
| A. | special component used in transformer to control sound |
| B. | special construction technique |
| C. | special supply technique |
| D. | graphical nature shown by transformer sound |
| Answer» C. special supply technique | |
| 5. |
MAIN_AND_BASIC_DESIGN_OF_THE_TRANSFORMER_IS_TESTED_BY____________?$ |
| A. | routine tests |
| B. | special tests |
| C. | type tests |
| D. | different tests |
| Answer» D. different tests | |
| 6. |
Transformers are located ______________$ |
| A. | anywhere |
| B. | in the direction of down wind |
| C. | in the direction of up wind |
| D. | can be located in any wind direction according to the application |
| Answer» C. in the direction of up wind | |
| 7. |
The_most_carried_method_of_attenuation_of_transformer_is____________$ |
| A. | changing core material |
| B. | increasing oil tank size |
| C. | building walls around transformer |
| D. | adding some another fluid in oil tank |
| Answer» D. adding some another fluid in oil tank | |
| 8. |
Step-lap is ____________? |
| A. | special component used in transformer to control sound |
| B. | special construction technique |
| C. | special supply technique |
| D. | graphical nature shown by transformer sound |
| Answer» C. special supply technique | |
| 9. |
Noise emitted by the transformers when drawn against frequency shows the ______________ |
| A. | increasing curve |
| B. | straight line increasing |
| C. | straight line decreasing |
| D. | decreasing curve |
| Answer» E. | |
| 10. |
How the A-weighted sound power level is calculated? |
| A. | L<sub>WA</sub>= L<sub>pA</sub> – 10 log<sub>10</sub> S/S<sub>O</sub> |
| B. | L<sub>WA</sub>= L<sub>pA</sub> + 10 log<sub>10</sub> S/S<sub>O</sub> |
| C. | L<sub>WA</sub>= L<sub>pA</sub> + 10 log<sub>10</sub> S*S<sub>O</sub> |
| D. | L<sub>WA</sub>= L<sub>pA</sub> – 10 log<sub>10</sub> S*S<sub>O</sub> |
| Answer» C. L<sub>WA</sub>= L<sub>pA</sub> + 10 log<sub>10</sub> S*S<sub>O</sub> | |
| 11. |
A 400 V, 10 KVA transformer at 60 Hz, is operated at the frequency of 40 Hz, then the humming __________ |
| A. | increases |
| B. | decreases |
| C. | remains same |
| D. | increases to very high |
| Answer» B. decreases | |
| 12. |
The hum in a transformer is in direct proportion with ______________ |
| A. | load changes |
| B. | oil in the transformer |
| C. | magnetostriction |
| D. | mechanical vibration |
| Answer» D. mechanical vibration | |
| 13. |
The noise produced by a transformer is termed as _____________ |
| A. | zoom |
| B. | hum |
| C. | ringing |
| D. | buzz |
| Answer» C. ringing | |
| 14. |
In which of the following category, noise level test of a transformer falls in? |
| A. | Special test |
| B. | Routine test |
| C. | Type test |
| D. | Different test |
| Answer» B. Routine test | |
| 15. |
If para magnetic core is used in the place of the ferromagnetic core of the transformer, then what will happen to magnetostriction? |
| A. | be vanished |
| B. | reduce |
| C. | increase |
| D. | not be affected |
| Answer» B. reduce | |