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Electrical Engineering Interview Questions

What is Lockout Relay and what is use of it in electrical installation

2455

Dear sir, iam completed iti ncvt electrician 2000-2002 & diploma electrical eng completed 2008-2010 distance education in rvd university, still i got B licences only but my working company want C licences, how to i get c licencese pls reply me iam in critical situation thank you karthick 9841637803

896

What is the Surge for 1.1 Phase Induction Motor(For Eg.1Hp) 2.3 Phase Induction Motor(For Eg.1Hp) 3.AirConditioner(For Eg 1Ton) 4.Refrigerator(For Eg 180Ltr or 160kW) 5.Induction Cooker 4. Ceiling Fan

1254

What is the purpose of SOTF being used inspite of distance Protection given?

43032

what is the operating time for LBB and how does the LBB relay realise whether cb is opened or not?

981

why in generating station generation voltage is 11 kv

3704

What is the Good Earth resistance value of G.I & Cu. Chemical Earthing & Normal Pipe Earthing?

1387

we have 3 phase 4 wire supply 230/415 V.AC and our distribution is single phase or we have all single phase 220 v,ac operated appliances. and noted the current with help of clamp meter Red to N = 20 Amps. Yellow to N = 45Amps and Blue to N = 30 Amps ( total is 95 Amps ) what will be neutral current on the main .

ABC,

3917

What is mimimum di -electric strength value for 33 KV transformer OLTC oil

1125

KVA transformer of different frequencies of 50hz,100hz,500hz&1000hz. which one of these transformer has big size? Give reason

5372

what is cogging and crawling

1613

what are the stresses in circuit breakers ?

1137

What is mean A32 B32 C32 D32 in mcb(miniature circuit breaker)

34415

Is there any relation between transformer capacity and its bdv?

2038

how many BUSBAR is in electrical system?

3729

Un-Answered Questions { Electrical Engineering }

what is physical distance of isolator to VCB in 33/11kv sub stations

1279

Which of the following alternatives will be cheaper (1) A 100 h.p AC, 3-phase motor (2) Four motors of 25 h.p each (3) Five motors of 20 h.p each (4) 10 motors of 10 h.p each explain

1791

why transformer tank is in rectangular shape what happen when it is in step shape

560

what's the requirement of Dy11d0 connection of 3 phase transformer?what's use of it?

6244

Compare salient pole and cylindrical rotor machines.

1072

What do you understand by avr?

211

what is resver in electrical enginnering with answer

696

Actuality I have at home electrical panel with 220v 50hz, and I want to converter from there to 110v 60hz, to wiring on the half of my house. Also I like to keep another half of my house with the original 220v 50hz. What is the best and safety way to do?

925

I have finish diploma electronics and five years experience in electrical field in ht service how can i get c licensce or other electrical certificate

774

What is ST and specify its range of voltage.

1097

HOE WE CAN IMPROOVE BY USE OF CAPACITOR

1123

What is the source of dependent source ?

1038

what is the significance of terminal voltage and phase sequence in the operation of paralleling of two generators?

1652

mostly the questions were from machines... d.c. machines, transformer, synchronous and induction all theory paper........ few from power system... but the level of paper was easy.....

1073

What is the rating of a circuit breaker needed for 300 kv load in 33KV supply line of 33/415 transformer ? Whether 800/1200 amp vaccum circuit breaker can perform for a 33 KV line in input in 415 volt in output of the transformer ?

866