Transformer: [ ISRO,DRDO,DMRC,SAIL, ODNANCE, HAL, WBSEDCL, RAILWAY
& Others competitive]
31. The higher voltage for transmitting electrical power in India is….(ISRO, ORDNANCE , DMRC , DRDO Repeated )
32. In a transformer the resistance between its primary and secondary is.. [ Very very important ]
33. A transformer oil must be free from….
34. A Buchholz relay can be installed on..
35. Gas is usually not liberated due to dissociation of transformer oil unless the oil temperature exceeds..
36.The main reason for generation of harmonics in a transformer could be…
4. saturation of core
37.Distribution transformers are generally designed for maximum efficiency around.…(ISRO, ORDNANCE , DMRC , DRDO Repeated )
38. Which of the following properties is not necessarily desirable in the material for transformer core?
2.Low hysteresis loss
3.High thermal conductivity
39. Helical coils can be used on… [ Very very important ]
1.low voltage side of high kVA transformers
2.high frequency transformers
3.high voltage side of small capacity transformers
4.high voltage side of high kVA rating transformers
40. High frequency transformers sometimes make use of ferrite cores because it has
1.high specific gravity
2. high resistance
If You Want More Questions Then Click Below
ISRO Previous Years Question paper pdf technician- B (electrician)
Question Papers pdf in Hindi & English language (ITI Electrical)
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