Hi Friends,

Here I'm contributing a GAIL Paper electrical stream which held on 28th November, 2010.


Paper I: Domain knowledge 100 questions

paper II: Aptitude version


Some of the questions from domain subject:

1) Highest operating voltage for cable in overhead transmission?

2) Short transmission line?

3) 66 kv suitable for
a) STL B)MTL C) LTL D) NONE

4) In an ACSR conductor aluminum mainly helpful for
a) Mechanical strength b) Insulation 3) Fatigue

5) Advantage of corona greatly helpful in radio interference

6) Bundled conductor helpful in a) Surge impedance of line reduce 2) Interference with neighboring communication decreases

7) No.of poles in case of wound rotor induction motor

8) Best suitable for height starting torque in case of induction motor.

9) syncho\ronous motor overexcited behaves as
a) leading b)lagging c) unity pfg

10) Relative space between stator and rotor is zero in case of
a) Synchronous motor b) Induction motor c) All d) none

11) Transformers which of the following is best protecting system
a) over current relay b) percentage differential relay 3( buchhcholz relay

12) Reason for placing transformer winding in steel tank helpful in
a) Mechanical protection b) Core reduces

13) OC test on transformer mainly perform on lv side or hv side

14) On SC test in case of transformer can be negligible because of?

15) Operating cost of thermal or stream power plant would be
a) Less than nuclear poer plant b) Less than the hydel plant c) eu\equal oto to nuclear plant

16) Fuel for gas or stream power plant would be?

17) Initial value theorem is which of the following?
Lt x-->o Sx(s) ass-->oo

18) Pulverized coal used in thermal power plant
a) Combustion purpose b) Burning becomes easy

19) Equation given you need find out equivalent transfer function

20) For step w system ramp will be
a) Infinity b) Finite c) Zero

21) Penn of diode connection does not possible why?

22) scr is reversibility then
a) Two junction reverse biased b) Only one junction reverse biased c) Either of one may be forward based

23) In case of parallel capacitor chopper
Ans: Circuit turn off time less than the main thyristor value

24) which of the following needs two power supplies" comparator or diode or scr

25) Gate else will be generated by
a) Astable mv b) Monostable mv c) Bistable mv

26) How many logical gates will be in case of stable vibrator

27) Successive approximation needs how many comparators

28) If resistance value of each side in case of delta connection would be 3 ohm then in case of strait would be?

29) Which type of bridge method useful for measuring small resistance?

30) Super position principle based on
a) Reciprocity b) Linearity c) Duality

31) Question mainly asked on behaviors of sine wave in case frequency domain time domain nearly questions from sine wave will be 5 from various topics.

32) What would happened if steady state error k then the gain?

33) DVM

34) CRO

35) Potentiometer Questions from each topic above said had covered
36) In case of capacitor when you made give supply a) charge deposited inner plate charge deposited outer polacte

37) Medium between capacitor place air or dielectric insulating or dielectric conduction

38) From heated body to unheated body heat transfer by the prinicple of induction or conduction or dissipation

39) Avg, rms values for half wave rectifier

40) Chopper main principle

41) Two capacitors of same value C connected in series then equivalent capacitance vae

42) Function of hwr rectifier in case of chopper

43) Constant Voltage Variable Frequency in chopper because of
44) Question of op amp

45) Cyclo converters main principle

46) Transformer principle

47) Power in ac circuit
a) P= VI b) P=VI SIN OF c) P==VI COS

Rest of 50 questions i could not present here as all are from mainly signals and systems, power electronics, analog electronics, digital electronics, control systems if you thorough in above topic you will be final list of selected candidate.


Part II: 2 questions on correction of sentence:

2 questions on fill in the blanks
2 question on articles
2 question of synonyms
3 questions on passage

15 questions on General Awareness this section bit of important as they covered previous 15 months news each question from each month, 15 questions on speed and time interests, percentage, data interpretation.

My suggestion to you all make your self through preparation in all topics especially from electronic subjects

all questions are simple and confusing make sure your self that if you miss any topic during in your preparation you get a chance to answer one question.

Myself i have done well I believe, i will be one among the GAIL people in future.

Thank you.

All The Best!