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June 20, 2013

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)

7.       Min fuel cost in power plants---------------(Hydel power plants)
8.       governing mechanism is used to control the speed of -------------(turbine)
9.       The pollution is less in which PS-----------(hydel)
10.   More ash content in-----------------(Lignite)
11.   The pollution due to TPS can be minimized by--------------(Electro static precipitator)
12.   The energy conversion in centrifugal pumps--------
13.   The energy used to generate hydel power is-----------(KE)
14.   The process of burning nuclear fuel---------(Fission)
15.   The height of the chimney depends on-----------
16.   In a substation the LA is placed at-------------(bus bars)
17.   PLCC------------(power line carrier communication)
18.   The more losses in boiler due to--------------(flue gases)
19.   The dangerous thing  in steam boiler is---------(loss of water in boiler)
20.   The low level CB’s used upto and including-----------(1100v)
21.   The service voltage in power house----------------(230v)
22.   LV relays are used for protecting---------------(motor, feeder,transformer)
23.   Automatic supply interruption can be done when fault occurs by--------(CB)
24.   In hollow conductors the effect of current is min at------(centre of the conductor)
25.   In TPS type of cooling used for alternators-----------(hydrogen)
26.   For 220kv cables the type insulation used------------(compressed oil/gas)
27.   In a power plant a reverse generating capacity which is in service but its not operation is------------(cold reserve)
28.   Voltages used for electrostatic precipitator-------(50kv-100kv DC)
29.   coal is pulverized for------------(efficient burning)
30.   classifier is used for-------------(separate the size of the pulverized particles)
31.   Gates near the turbine-----------(wicket gates)
32.   Boilers are purged----------(~before starting, before shutting)
33.   The equipments in s/s are connected(earthing)----------
34.   jet ash is because of -------------(mix of water with ash)
35.   The power taking of three phase load--------(√3VIcosф)
36.   Form factor--------------(rms value/avg value)
37.   MMF is analogous to------(voltage)
38.   Kirchoffs first law-----------(KCL)
39.   VRLA batteries -------(Valve regulated lead acid)
40.   200AH-------------(200A for one hour)
41.   Mostly used batteries in the industry--------(Lead acid)
42.   In direct arc furnace -----------is more(V,I, pf)
43.   units of Illumination----------(lux)
44.   The armature reaction first effects the-----------------(back emf per phase)
45.   The thickness of material is reduced for reducing---------(eddy current loss)
46.   constant speed motor------------(synchronous motor)
47.   For starting of single phase IM the method is----------(auxiliary winding in stator)
48.   Statically induced emf in-------------(transformers)
49.   N1=1000,E1=250,E2=400, N2=_-----------------(1600)
50.   DC series motors can,t be run on no load bcoz------------(high speed)
51.   The max speed achieved by a 2 pole ,50hzalternator-------(3000rpm)
52.   The no.of parallel paths required for a 2 pole duplex lap winding machine----(4)
53.   The voltage equation for a dc motor------(Eb=V-IaRa)
54.   The angle b/w rotating field flux and rotor---------(synchronizing angle)
55.   An SCR is a------------(4-layer, 3terminal device)
56.   In normal operation of a pnp transistor its junctions are biases--------(EB-forward,CB-reverse)
57.   The voltage that is applied to diode when its reverse biased-------(PIV)
58.   The min no.of diodes required for a fullwave rectifier-----------(2)
59.   The input of rectifier is 230v, 50hz the o/p freq is-------(zero)
60.   An ideal opamp---------(infinite i/p impedance, zero o/p impedance)
61.   Photo transistor works on-------------(Light intensity)
62.   A transistor amplifier with low efficiency------------(Class A)
63.   By considering noise level which type of modulation is preferred--------(FM)
64.   Modulation purpose is--------(enable efficient transmission over long distance)
65.   DVM measures---------(rms value)
66.   The time settings in CRO can be done by--------(x-axis)
67.   The bidirectional operation of two SCRs connected back to back is---------(TRIAC)
68.   SMPS uses---------(MOSFET)
69.   Moving coil instruments are used to measure-----------(DC)
70.   The speed of the motor can be measured by----------------(Tachometer)
71.   Orifice meter is used for measuring-----------(flow)
72.   Pressure measuring instrument--------
73.   Temperature measuring instruments------------(thermocouple)
74.   Megger is used for -----------(measuring insulation R)
75.   The Otto cycle is a-------------(4-stroke engine)
76.   In a petrol engine mixing of fuel and air occurs in-----------(carburetor)
77.   How PLC connecting with PC--------(RS-232, RS-485, Ethernet )
78.   Non volatile memory is--------(when power off memory will be lost)
79.   EX-OR gate-------------(A’B+AB’)
80.   Healthy flame in which color------------------
81.   ctrl+V----------(paste)
82.   Tables can be created in(MS)-----------(MS word)
83.   power point can be used to------------( presentation)
84.   For purifying the water chlorine is used ---------(T/F)
85.   EPABX------------------(electronics private automatic branch exchange)
86.   Green cleaning is------(growing trend in favor of using cleaning methods)
87.   IDA--------(Industrial development and regulations)
88.   Height and size of the Lathes depends on----------
89.   Basic characteristic to identify vibration---------(frequency, phase, acceleration)
90.   Flame scanners are used for-------
91.   CO 2  and mixed power are--------- type of fire extinguishers(class B)

OTHER PAPERS
AP TRANSCO ELECTRICAL - TECHNICAL PAPER
            SUB-ENGINEERS TECHNICAL PAPER 2012
            ENGINEERS TECHNICAL PAPER 2012
AP GENCO - TECHNICAL PAPER
            TECHNICAL PAPER 2012
            TECHNICAL PAPER 2011
AP CPDCL ELECTRICAL - TECHNICAL PAPER
            TECHNICAL PAPER 2010
BHEL ELECTRICAL - - TECHNICAL PAPER
            TEHNICAL PAPER 2010
            TEHNICAL PAPER 2009

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1 comment:

Dharavath Rajkumar said...

THANK YOU SIR FOR PROVIDING PREVIOUS YEAR QUESTIONS FOR SUB ENGINEERING
But in your answers some mistakes are there
question no 16.generally lighting arrestors provided for transformer in substation.
question no 78.in NON VOLATILE memory is not lost when power is turn off .memory lost in volatile memory.
question no 80.the colour of pure flame is-blue

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