Interested to Buy Any Domain ? << Click Here >> for more details...
Transformer cores are laminated in order to A simplify its construction B minimize eddy current loss C reduce cost D reduce hysterisis loss
3278A transformer has negative voltage regulation when its load PF is A zero B unity C lagging D leading
1 8166Essential condition for parallel operation of two single phase transformer is that they should have same A polarity B kVA rating C voltage ratio D % impedance
1 11353Saving in copper achieved by converting a 2 winding transformer in to an auto transformer is determined by A voltage transformation ratio B load on secondary C quality of core material D size of transformer core
3143kVA rating of ordinary transformer is increased when connected as an auto transformer because A transformation ratio increased B secondary voltage increased C energy is transferred both inductively and conductively D secondary current increased
2660At light load transformer efficiency is less because A secondary output is low B transformer losses are high C fixed loss is high compared to output D copper loss is small
1 5811Which of the following connection is best suited for 3-ph, 4 wire system A delta-delta B star-star C delta-star D star-delta
2 9972A T-T transformer can not be parallel with transformer A V-V B star-delta C star-star D delta-delta
1 6507Following test should be conducted to find out relative polarity of transformenr terminals A no load test B back to back test C phasing out test D none of above
2214In power transformer tappings are provided on A high voltage side B low voltage side C In middle of both the windings D both high and low voltage side
NNN,
2 5365Main advantage of auto transformer over two windings transformer is that A it needs no cooling B it uses only one winding C core losses are reduced D it has simple construction
2948Material commonly used in making transformer core is A cast iron B mild steel C high silicom steel D high carbon steel
1 3549If we impress a dc voltage of 230 V on an unloaded 230 V, 50 Hz transformer it wi A give high secondary voltage B burn out C give secondary voltage as per K D none of these
2004If we impress a dc voltage of 230 V on an unloaded 230 V, 50 Hz transformer it wi A give high secondary voltage B burn out C give secondary voltage as per K D none of these
1 3268Short circuit voltage of a transformer mainly depend on A ohmic resistance of primary B ohmic resistance of secondary C magnitude of leakage flux D cross sectional area of core
1 9604Post New Electrical Engineering Questions
sir my exam is on 19/6/2013 under electrical branch pls send me sample aptitude questions as well as sample technical questions for jindal steel and power company
what is ratio of copper wire size and current ?
Is there any standard guidelines/Criteria to design NGR/NGT.?
what is the size of ht cable of 33kv ht line and transformers ratings are 1 Mva and 5mva.please send formula also.
the winding of Generator and Motor is star or in delta ? and why
WHAT IS THE DIFFERENCE BETWEEN AN ACB & mccb 7 WHAT IS THE CRITERIA WHEN TO USE WHICH OF THE TWO
How to decide the size of the capacitor for a single phase induction motor say 2 HP ??
What are the advantages and disadvantages of closed-loop control system?
what is ramping rate of generator
Single line diagrams for star to delta and DOL starters.
what is the internal working of star delta starter
How earthing of switchgear system to be done.
Which device of PlC does share load between DG sets when DG are running in perallel?
How to work definite,over pluxing,revers power,OSR relay
how can we design robots
