SOME TECHNICAL QUESTIONS FOR APGENCO APTRANSCO AEE EXAMS PART 3

APGENCO/APTRANSCO

Assistant Engineer Electrical Previous Question Papers

Q.1 The two windings of a transformer is

 conductively linked.

 inductively linked.

 not linked at all.

 electrically linked.

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APGENCO 2012 Technical Previous PAPER

APGENCO 2012 KEY PAPER

1. Transfer Function of a System in  1/(s+1)(s+2) the impulse response of the System is

A) e^-2t  – e^-t    B) e^-2t  + e^-t      C) e^-t  + e^-2t       D) e^-t  – e^-2t

2. In a thermal power plant,ash is Collected in

A) Mills     B) hoppers    C) Bunkers    D) Boiler

3. The average life of neutrons after they decay is

A) 1 sec     B) 10 sec    C) 100 sec   D) 1000 sec

4. The Operating time of instantaneous relay is

A) 0.001 sec  B) 0.01 sec   C) 0.1 sec   D) 1 sec

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SOME TECHNICAL QUESTIONS FOR APTRANSCO APGENCO ELECTRICAL PAPER PART 2

 1. In a dc shunt motor the terminal voltage is halved while the torque is kept constant. The resulting approximate variation in speed ” ω” and armature current “I_a‘” will be

(A)  Both ω and I_aare doubled.

(B) ω is constant and I_a is doubled

(C) w is doubled while I_a is halved

(D) w is constant but I_a is halved

Ans: B

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SOME TECHNICAL QUESTIONS FOR APGENCO APTRANSCO ELECTRICAL EXAM PART 1

Q.1 The two windings of a transformer is
(A)   conductively linked.

(B)  inductively linked.
(C)  not linked at all.

(D)  electrically linked.

Ans : B

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APTRANSCO SUB ENGINEERS 2012 Previous Paper Electrical

APTRANSCO SUB ENGINEERS 2012 KEY

1. The speed torque characteristics of a series motor is a/an--------------(Hyperbola)
2. In ad dc generator, if the variable loss is equal to constant loss, then efficiency is-------(Max)
3. The armature of a dc machine is laminated to reduce-----(eddy current loss)
4. The initial flux in a dc generator is provided by-----(residual magnetism)
5. For the operation of milling machine, which motor is used----( DC shunt motor)
6. In a series motor, the torque is----( proportional to square of armature current)

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APTRANSCO 2012 ELECTRICAL Previous Paper

APTRANSCO 2012 KEY ELECTRICAL

1. 

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)

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AP TRANSCO PREVIOUS QUESTION PAPER ELECTRICAL

AP TRANSCO PREVIOUS QUESTION PAPER-ELECTRICAL

1. Mho relay is usually employed for the protection of
a) Short lines only
b) Medium lines only
c) Long lines only
d) Any line

Ans: Long lines only

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APGENCO-SUB ENGINEERS 2011 Technical Previous Paper

APGENCO-SUB ENGINEERS 2011 KEY PAPER

1.       Demand factor=----------------------(MD/Connected load

2.       Kaplan, francis, propeller turnbines are------------(Reaction turbines)

3.       Efficiency of a thermal power station is------------(30%)

4.       In india max power is supplied from---------------(Thermal power plants)

5.       Water hammering effect developed in------------(penstock)

6.       In an hydro electric power plant a conduit system for carrying water from intake to turbine is --------------(penstock)

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APCPDCL-SUBENGINEERS 2010 Previous Paper

APCPDCL-SUBENGINEERS 2010 KEY PAPER

1.       Value of  εo=-------------------

2.       Relation b/w E,Q and V------------

3.       In a RC series circuit the  initial current is --------------

4.       In a RC series circuit At resonance the p.f. -------------

5.       The complex form of Magnitude 100 and Phase shift 30⁰  _{-------------------------}

6.       v=100sin1256t find f=--------------

7.       If temperature increases dielectric constant----------

8.        High thermal conductivity is for---------

     a)solid ice  b)melting ice  c)steam  d) water

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BHEL 2009 BHEL 2010 Technical Previous Paper

This post is useful for preparing technical part of AP GENCO AP TRANSCO APCPDCL

BHEL PAPER2 -2009

1.SCR of an alternator is___________________________(Ans :inversely proportional to Xs adjusted in P.U)
2.In Synchronous Impedance method the regulation is__________(Ans: Higher than actual)
3.Thyristor which is in forward blocking method will conduct if________(Ans:-Positive gate pulse to Cathode)
4.SC test of T/F will give __________( Copper lossers)

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