APTRANSCO AE 2012 Question Paper,Solutions,Answers Key,Discussions Held on 29 Jan 2012

APTRANSCO Assistant Engineers AE Written Exam 2012 Question Paper Discussions related to Answers & Solutions are allowed here through the Comments. APTRANSCO AE 2012 Paper held on 29-01-2012 is not given to Candidates,So please Share the Questions you remembered so that we can Answer them.

For APTRANSCO AE Electrical Question Paper 2012,Answer Key for SET A,SET B,SET C,SET D Click below ::

APTRANSCO Assistant Engineer AE Electrical Question Papers all Sets (A,B,C,D) :: UPDATED

Set A Question Paper

Set B Question Paper

Set C Question Paper

Set D Question Paper

APTRANSCO AE Electrical Answer Key 2012 –CLICK HERE

APTRANSCO Assistant Engineer AE Telecom Question Papers all Sets (A,B,C,D) ::

Set A Question Paper

Set B Question Paper

Set C Question Paper

Set D Question Paper

APTRANSCO AE Telecom Answer Key 2012 –CLICK HERE

Total Exam will be of Duration 2 hours Consists 100 Marks (100 Questions). APTRANSCO AE Exam conducted for both Electrical & Telecom Streams for the recruitment of Assistant Engineers. All The Best for all Candidates those who are appeared for the APTRANSCO AE Exam.


Candidates those who appeared for APGENCO AE Exam Click here to check the Answer Keys

APTRANSCO  Assistant Engineers (AE) Electrical 2012 Memory Based Question Papers with answers given by visitor.

1.  A voltage waveform v(t)= 12 t2 is applied across a 1H inductor for t>=0 with initial current through it being zero. The current through the inductor for t>=0 is given by———–(4t3)

2.       Two incandescent light bulbs fo 40w and 60w rating are connected in series across the mains. Then——–(the 40 bulb glows brighter)

3.       Given two coupled inductors L1 and L2, their mutual inductances M satisfies—–(M<=sqrt(L1L2)

4.       Consider the star network. The resistance between terminals A and B with C open 6ohms, between terminals B and C with A open is 11ohms, and between terminals C and A with B open is 9ohms. Then ————(Ra=2, Rb=4, Rc=7)

5.       In a series RLC circuit at resonance, the magnitude of the voltage developed across the capacitor——( can be greater than the input voltage, however, it is 900 out of phase with the input voltage)

6.       A two port device is defined by the following pair of quations:

i1=2v1+v2 and i2=v1+v2 its impedance parameters (z11, z12, z21, z22) are—–(1,-1,-1,2)


7.       The impulse response of an initially relaxed linear system is e-2tu(t).to produce a response of

te-2tu(t), the input must be equal to——–(e-2t u(t))

8.       The no of roots on the equation 2s4+s3+3s2+5s+7=0 that lie in the right half of s plane is——-(2)

9.       For a feedback control system of type 2, the steady state error for a ramp input is——-(zero)

10.   The output of a linear time invariant control system is c(t) for a certain input r(t). if r(t) is modified by passing it through a block whose transfer function is e-s and then applied to the system, the modified output of the system would be———–(c(t-1)u(t-1)

11.   The phase lead compensation used to—–(decreases both rise time and overshoot)

12.   Consider two buses connected by an impedance of (0+j5)ohm. The bus 1 voltage is 100/300 v, and bus 2 voltage is 100/00 v. the real and reactive power supplied by bus 1, resp are……….(1000w, 268 VAr)

13.   For a fixed value of complex power flow in a transmission line having a sending end voltage V, the real power loss will be proportional to———–(1/V2).

14.   During a disturbance on a synchronous machine, the rotor swings from A to B before finally settling down to a steady state at point C on the power angle curve. The speed of the machine during oscillation is synchronous at point(s)——————–(A and B)

15.   A 100 MVA, 11kv, 3 phase 50hz, 8 pole synchronous generator has an inertia constant H equal to 4 MJ/MVA. The stored energy in the rotor of the generator at synchronous speed will be—(400MJ).

16.   In a biased differential relay the bias is defined as a ratio of———-(operating coil current and restraining coil current))

17.   Resistance switching is normally employed in——(ABCB)

18.   The use of high speed circuit breakers—-(improves system stability)

19.   Keeping in view the cost and overall effectiveness, the following circuit breaker is best suited for capacitor bank switching—(vacuum)

20.   If the reference bus is changed in two load flow runs with the same system data and power obtained for reference bus taken as specified P and Q in the latter run———-( the system losses will be unchanged but complex bus voltages will change.)

21.   The gauss seidel load flow method has following disadvantages. Tick the incorrect statement——( unreliable convergence)

22.   The torque speed characteristics of a repulsion motor resembles which of the following dc motor characteristic————(series)

23.   Which type of motor is most suitable for computer printer drive—–(stepper motor)

24.   A 4 pole lap wound DC generator has a developed power of P watts and voltage of E volts. Two adjacent brushes of the machine are removed as they are worn out. If the machine operates with the remaining brushes, the developed voltage and power that can be obtained from the machine are—-(E,P/4)

25.   A 4 point starter is used to start and control the speed of a ———–( dc shunt motor with field weakening control)

26.   The function of oil in a transformer is—–( to provide insulation and cooling)

27.   The core flux of a practical transformer with a resistive load————( is strictly constant with load changes)

28.   In a transformer zero voltage regulation at full load is—-(possible at leading pf load)

29.   A single phase transformer has a turns ratio of 1:2, and is connected to a purely resistive load. The magnetizing current drawn is 1 A, and the secondary current is 1A. if core losses and leakage reactance are neglected, the primary current is-(2.24A)

30.   The low voltage winding of a 400/230V, single phase 50hz transformer is to be connected to a 25hz, the supply voltage should be——-(115V)

31.   A 400/100V, 10 KVA two winding transformer is reconnected as an auto transformer is reconnected as an auto transformer across a suitable voltage source. The maximum rating of such an arrangement could be—–(50KVA)

32.   When the supply voltage to an induction motor is reduced by 10%, the maximum torque will decrease by approximately——-(20%)

33.   In case of a split phase motor, the phase shift between currents in the two windings is around——(300)

34.   Starting torque can be obtained in the case of a single phase induction motor with identical main and auxiliary windings by connecting—–( a capacitor in series with the auxiliary winding)

35.   For a single phase capacitor start induction motor which of the following statements is valid—( the direction of rotation can be changed by reversing the main winding terminals)

36.   An induction motor having full load torque of 60zNm when delta connected develops a starting torque of 120Nm. For the same supply voltage, if the motor is changed to star-connection, the starting torque developed will be——-(40NM)

37.   During hunting of synchronous motor –(damper bar develops torque)

38.   The phase sequence of a three phase alternator will reverse if ——-(the field current remains the same but the direction of rotation is reversed)

39.   The effect of stray magnetic fields on the actuating torque of a portable instrument is max when the operating filed of the instrument and the stray fields are-(parallel)

40.   A current of -8+6 (sinwt+300)A is passed through three meters. They are a center zero PMMC meter, true rms meter and MI instrument. The respective reading( in A) will be—-(-8,10,10)

41.   R1 and R2 are the opposite arms of a wheatstone bridge as are R3 and R, the source voltage is applied across R1 and R3 under balanced conditions which one of the following is true—(R1=R2R3/R4)

42.   A dc potentiometer is designed to measure up to about 2v with a slide wire of 800mm. a standard cell of emf 1.18v obtains balance at 6010mm. a test cell is seen to obtain balance at 680mm. the emf of the test cell is-(1.34v)

43.   The minimum number of wattmeters required to measure3 phase 3 wire or unbalanced power is—(2)

44.   A reading of 120 is obtained when a standard inductor was connected in the circuit of a Q meter and the variable capacitor is adjusted to a value of 300pF. A lossless capacitor of unknown value C, is then connected and the same reading was obtained when the variable capacitor is readjusted to a value of 200pF. The value of Cx in pF is—(100)

45.   The two inputs of a CRO are fed with the two stationary periodic signals. In the X Y mode, the screen shows a figure which changes from ellipse to circle and back to ellipse with its major axis changing orientation slowly and repeatedly. The following inference can be made from this———-(there is a constant but small phase difference between the signals)

46.   SCR can be turned off—( anode current should be less than holding current)

47.   The no. of pn junctions in SCR—–(3)

48.   TRIAC is a—(antiparallel thyristors combination)

49.   GTO can be turned off-(by using a negative current pulse)

50.   Which type of control is used for controlling the ac drive by using thyristors——–(integral cycle)

51.   In DC choppers the output voltage can be controlled by using FM technique varying——–( T , Toff constant)

52.   In phase control rectifiers the output voltage ripple can be controlled by—‘(load inductance)

53.   Which is not a current controlled device—–(MOSFET)

54.   Inverter function———(DC to AC with variable frequency)

55.   In phase controlled rectifiresfree wheeling diode makes-(load current continuation)

56.   Dielectric heating application—-(wood)

57.   In induction heating the following is abnormally high——–(frequency)

58.   Tractive effect w.r.t driving wheel axis——–(tangential*)

59.   welding transformer sets have————-(high current, low voltage)

60.     Simplify x’y’z+x’yz’+xy’z+xyz+xyz’=——-(y’z+yz’+xz)

Make this Discussion Successful, Thank you.


  1. hii friends ,this is prathi, transco applicant, plz can anybdy tell that when the correct key they r releasing.

  2. when will the high court give its verdict and waht is happening about recruitment process can anyone plz update

  3. I think you all know that Court issued stay order on Transco results.
    Any one have any idea, what will probably happen about transco result…
    Friends, Express your views….

  4. Any how kks you definetly got job brother i think you are in TOP 50 of transco merit list….what you say kks……?

  5. Mr.KKs means santosh kumar kasina BC_B you got 81 marks in old list book let CODE – C
    in new list your score may be around 83 brother damsure……

  6. friends one thing we should not forgot that is the TOP 100 of GENCO list lo unnavaru TRNSCO lo 90% people TOP place lo unnaru. So finally what i am saying is 73 and above with reservation unnavallu hopes pettukovachu….

  7. Mr.kks means kranthikumar reddy PTR DOB 01/06/1988 OC actually you should be get 0 marks becoz you are not mark your question booklet code in OMR sheet. HOw they can valuate your sheet i don’t know ….?

  8. Mr.KKs i am not agree with you man .In old list 75 and above candidates are around 250 only
    how can you say’s old cut-off will be 79 man…? I am expecting the new list top marks are about 91or 92.In old list topper some of candidate marks may be incresed or may be decresed who known man.why i am saying this is the wrong ans question are temting answers
    definetly some candidates marks are decresed surely

  9. Can anyone please consolidate the 13 Questions for which the key is wrong, we can plan to give a written complaint to Transco HR, If you give proper explanations to the proposed answers for these questions it will be helpful

  10. “in case of split phase motor, the phase shift between currents in the two windings is around”
    What is the answer for this question, is it 30 degrees or 90 degrees.
    Why no one is discussion about this question? I think it should be 90 degrees, any comments on this?

  11. hi yadgiri,i also hav same problem,i submit the letter to transco by hand and explain the problem.nearly 13 ques there was given a wrong key.i hope they wil change the key nd re valuet OMR sheets.can u give ur contact no.

  12. Present cut off is 79 and new cut off will be more than 91; because all present toppers are candidates who prepared for gate, so they will also get those 13 mistakes corrected

  13. friends let us discuss our new score’s .Tell your score and zone category.By knowing this we can expect what is cut-off ok friends.
    My old score is 66
    New score around 75
    zone-hyd rural

  14. Mr raju according his key the given marks are correct ya. there is NO doubt in that but their is wrong and some mistakes are there about 11 in this case we will agree with you man .Better to check once again what you mark in OMR sheet.

  15. Mr.s Venki i am not agree with you becoz
    7)compensation coil is used in voltage coil read question properly
    2)CRO phase difference is there between signal the shape is transfored ellipse to circle vice versa is in AK shany
    4)operation coil ct /restraining coil ct
    Nr/N0=2(i1-i2)/(i1+i2) ok check yourself once again it’s all gate questions

  16. friends don’t loose hopes let fight with transco until change the key and re valuate the OMR sheets .For that all of them give a compliant to transco i am also send complaint.The address is
    e address ku wrong ans and your right answers rasi send cheyandi
    I am got 66 marks there are 11 wrong ans are there in key if those are consider my score is become 77 marks.
    I hope all of them do same thing

  17. Omr sheets are released,acc to key given marks are correct,but the key is wrong.Actually i should get 83 but i got only 71

  18. the parer setter takes the gate ques from GK publications & key also.in that book some blind mistakes r there in ans.pls check carefully.

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