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 Categories >> Engineering >> Electrical Engineering
 
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Question Asked @ Answers Views     Select
In constant power region of 3-phase IM torque-speed characteristics, if frequency increases flux A does not alter B decreases C increases D none of above    0  402
In constant power region of 3-phase IM torque-speed characteristics, if frequency increases slip A does not alter B decreases C increases D none of above    0  313
77 In constant power region of 3-phase IM torque-speed characteristics, the torque is proportional to A speed B slip C 1/speed D 1/slip    0  271
electrical ques    0  253
In 3 phase induction motor even with low Voltage it reaches nearly it's rated speed why? (for example instead of 400V it reaches with 250V)    2  1128
why the AC or DC motor takes high starting current?    2  1391
which motors is used in mixies    3  1031
Are we do it in single transformer with dual primary as 11 KV and 33 KV and constant output as 415 Volts?.    1  716
As load in a transformer increases, mutual flux linkage in core= A increases B decreases C not change D first increase then decrease    2  1990
Resistance of low voltage side of transformer compared to high voltage side is A less B equal C more D depens on design    1  1122
Transfer of electric power from primary to secondary in a transformer takes place A electrically B magnetically C electro-magnetically D conductively    2  901
Short 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  2425
If 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  564
If 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    0  194
Material commonly used in making transformer core is A cast iron B mild steel C high silicom steel D high carbon steel    1  1015
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Un-Answered Questions
 
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how did the testing of protection relays done through current injection 382
why they were using TRIAC instead relay in some controllers and what is the advantages. 394
What is given by the definition in BIL IMP/PF = 950/395 kV. This was found in a name plate of a power transformer. 128
how is the incoming cable size calculated for a given current rating of a panel?? 214
How does "OUT OF STEP" relay ,for Synchronous motor protection, work? 2425
pls tell us AC plant are how do work and parts name with picture 311
What fomula is used to calculate: 1. rated frequency withstand voltage, and 2. rated lightning impulse withstand voltage. 13
WE ARE PLACE A NEW 75 KW MOTOR FOR JPF.IT IS CONNECTED IN M.C.C. WHEN WE ARE STARTING M.C.C.INCOMER IS TRIPPED.THEN WE ARE CONNECTED IN P.C.C WITH A MM30 RELAY PROTECTION THEN WE ARE STARTED MOTOR WILL RUN SMOOTHLY. 362
transformer spections :: input voltage 0-110-230v; output volage 0-10-12-14v; amp=3A using CRNO CORE, capcaity=50VA primary turns = ? ; secondry turns =? 299
why need to be maintain power factor for industrial customer? 1793
What is the restart inhabit setting in ABB spam150c relay (Motor protection relay) 923
At full load wat is the motor p.f And at no load will is the motor p.f? 421
Hello sir, pls send me hpcl technical test papers .i am. Appearing for the exam. 440
I want the details about BHEL company examination.Can anyone able to help me please. 403
what purpose to use excaiter in DG.? 914
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