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             ELECTRICAL PAPER -SOME IMPORTANT QUESTIONS 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