Q-1 what are the structural and operational difference between a distribution and a power transformer?
Q-2 what is skew in motors?
Q-3 draw equivalent circuit of transformer
Q-4 explain with phasors how pf is improved with loading in induction motors
Q-5 DIFFERENT METHODS OF CABLE LAYING(interviewer asked if i heard new chemical based earthing system next)
Q-6 pi model of medium length trans line
Q-7 v/f control?why
Q-8 vacuum circuit breaker operates in?
- 1 Answers
- 4472 Views
- Vijai Electricals, I also Faced
- E-Mail Answers
Answer Posted / guest
1. pwer distri
operational near full load charachs near no load
structural mostly delta delta delta star(neutral grounded).
2 .skewing is done on rotor to prevent magnetic locking btween rotor and stator also done to reduce noise and harmonics
3 4 6 .can be found on net
5. trays,direct burial in ground,trenches etc(next question followed on why petrochems dont use direct burial in ground tech-ans chemicals eat away insulation)
7.v proportional 4.44 phi f n
v n f only variables rest constant
if change v alone to higher value,to maintain constant flux f changes to lower value so ratio v/f is changed n not alone v or f
8.10^-6 to 10^-8 torr used mostly inremote area due to practically low maintain and high reliable
last question was important
Q- whats salary expectation
| Is This Answer Correct ? | 12 Yes | 1 No |
Post New Answer View All Answers
During Testing of Maintenance Free Earthing, How deep should be the Spikes of Earth Test Meter should be inserted in the soil(one spike is 15 Meter & Other spike is 30 Mtrs away from the Main Earth Electrode. Because, recently, we observed that when spike is inserted 3-4 Inch in the earth- results are better, If spike is inserted 1 feet deep than results are increasing.
Why are iron cores in transformers made laminated?
i want to apper for apgenco or aptransco or related can any one sugest me where can i get previous papers of thouse exams
we have a lot of model of rectifier but thyristor rectifier is the most rectifier that use in power system. Do you know why this rectifier is used?
how make megger test for control cable like 12c x 1.5mm and what it apply voltage and test timing details.
we have a rewind motor of 2Hp,2800Rpm, 220Volt AC. how can we choose the running capacitor for this motor, any formula for that?
does any one know where we can purchase insulation oil for high voltage oil filled cables
The 3 phase Delta connection RB=440V, BY=350V,.......* is Line to Line voltage RY= ? And Formula....?
how test transfomer(3 phase75kva) by megger
what is cogging and crawling
why is control bus bi-directional?
what is the necessary of using inductance property in transmission lines even through resistance is used to opposes the high current flows in that?????
a simple c++ program to calculate simple interst with its data members as private
What is the difference between a verilog task and a verilog function?
1600 KVA ka transformer hi aghar lt side par 800A aur voltage 420 ho to HT side ki cable ki rating keya ho gi?
