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Transformers Questions.(in Hindi)
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This lesson covers 10 most important questions of transformers expected in SSC JE 2018-19 examination.

Abhishek Kumar Srivastava
B.Tech in Electrical Engineering. Former Graduate Engineer Trainee. Qualified AIEEE, UPSEE, UP Polytechnic, AMCAT & other examinations.

U
Unacademy user
Hk
I was struggling in it for 2 days butsir you solved the problem in 15min Thanks
AJ
Ssc je exam Gujarati language main de sakte Hai
No. (Only Hindi or English language allowed)
AJ
Ssc je main hamari post gujrat main ho sakti
Pp
Nice sir and thankq for vedeo
  1. Transformers Questions Expected in SSC JE 2018-19


  2. Abhishek Kumar Srivastava B.Tech in Electrical Engineering Former Graduate Engineer Trainee. AIEEE, UPSEE, JEECUP, AMCAT Qualified. Profile Link: https://unacademy.com/user/Abhishek Srivastava


  3. Q.1 Transformer oil is used as Options: 1) An insulator 2) A coolant 3) both insulator & coolant 4) inert medium


  4. Q.2 - Which is to be short circuited on performing short circuit test on a transformer? Options: 1) Low Voltage Side 2) Primary side 3) High voltage Side 4) secondary side


  5. Q.3 - A Single Phase 50Hz transformer has high voltage and low voltage windings of 2200/220 V. What is the Transformation ratio? Options: Transformation ratio K N2/N1-V,/V 2 1 K 220 2200 K 1/10 1) 10 2) 1/10 3) 1 4) None of these K> 1 Step up K< 1 Step down


  6. Q.4- The primary and secondary windings of an Auto transformer are Options: 1) magnetically coupled 2) electrically coupled 3) both magnetically and electrically coupled 4) None of these


  7. Q.5 A 40KVA transformer has a core loss of 450 W and total loss of 800 W. Find the copper loss for Maximum efficiency. Options: 1) 350 W 2) 800 W 3) 450 W 4) None of these For maximum efficiency, Core loss Copper loss Copper loss = 450 W


  8. Q.6 The use of higher flux density in the transformer design Options: 1) reduces the weigh per KVA 2) increases the weight per KVA 3) has no relation with the weight of transformer 4) None of these


  9. Q.7 - The core flux in transformer depends mainly on Options: 1) Supply voltage 2) Supply voltage, Frequency and Load 3) Supply voltage and Load 4) Supply voltage and Frequency


  10. Q.8 Secondary winding of an auto transformer is also called Options: 1) compensating winding 2) common winding 3) tertiary winding 4) damping winding


  11. Q.10 Single Phase transformers can be used in parallel only when their voltages are Options: 1) Equal 2) Unequal 3) Zero 4) None of these