Overseer/Draftsman Gr II, Public Works Irrigation 274/2015 Answer key

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Category Code -274/2015
Exam - Overseer/Draftsman Gr II Electrical
Department - Public Works/ Irrigation
Qualifications: SSLC + Certificate in Electrical Engineering (course of 2 years), MGTE or KGTE Group Certificate in Electrical Engineering
Question Paper Code- 30/2017/OL 
Date of Test - 17-04-2017



  1. In two watt meter method of power measurement one watt meter shows negative reading the power factor of the load is
    • bellow 0.5 lagging
    • 0.8 lagging
    • unity
    • in between 0.5 and 0.8 lagging

  2. Ear to Ear resistance of wet human body is about
    • 150 ohm
    • 100 ohm
    • 400 ohm
    • 300 ohm

  3. To get different colour in same LED different fixed voltage want to be applied across it. To get red colour in LED the fixed voltage want to applied across it is
    • 2 V
    • 1.8 V
    • 2.1 V
    • 2.2 V

  4. The size of copper plate used in plate earthing system is
    • 60 cm × 60 cm × 3.15 mm
    • 60 cm × 60 cm × 6.3 mm
    • 30 cm × 30 cm × 3.15 mm
    • 60 cm × 60 cm × 3.3 mm

  5. Composition of plumbers solder is _______ % Tin and _______ % Lead.
    • 35 and 65
    • 60 and 40
    • 65 and 35
    • 50 and 60

  6. The frequency of electricity supply in India is
    • 45 Hz
    • 60 Hz
    • 55 Hz
    • 50 Hz

  7. In a transistor both collector base junction and emitter base junction is reverse bias the transistor is said to be
    • None of these
    • Cut off state
    • Saturation state
    • Active state

  8. The polarity of interpole is in the case of DC generator and motor is
    • ame as next main pole ahead in the case of motor and generator in the direction of rotation
    • same as the next main pole behind in the case of motor and generator in the direction of rotation of motor and generator
    • same as next main pole behind in the case of motor and same as next main pole ahead in the generator in the direction of rotation
    • same as next main pole behind in the case of generator and next main pole ahead in the motor in the direction of rotation

  9. Series type ohm meter is best suited for measuring
    • high resistance
    • low resistance
    • medium resistance
    • all of these

  10. Pitch factor of a winding is the ratio of
    • No of slot/pole pitch
    • Winding pitch/pole pitch
    • Pole pitch/winding pitch
    • None of these

  11. Efficiency of full wave rectifier is about
    • 81.20 %
    • 40.80 %
    • 83.10 %
    • 82.10 %

  12. Barrier voltage of silicon crystal is
    • 0.7 v
    • 0.3 v
    • 0.9 v
    • 1.1 v

  13. The instrument used for measuring insulation resistance of equipment is
    • Earth tester
    • Contact resistance meter
    • Megger
    • Ohm meter

  14. The type of motor used in vacuum cleaner is
    • Induction run motor
    • Universal motor
    • Capacitor start induction run motor
    • Capacitor start capacitor run motor

  15. The standard secondary out put of a current transformer is
    • 7A
    • 10A
    • 5A
    • 3A

  16. When capacitor testing with ohm meter, the ohm meter shows infinite resistance, the capacitor is
    • Open
    • Leakey
    • Good
    • Shorted

  17. One Webber is equal to _____ Maxwell.
    • 10000
    • 10000000
    • 1000000
    • 100000

  18. The working principle of earth tester is
    • Wheatstone bridge principle
    • Voltage divider method
    • Fall of potential method
    • Meter bridge principle

  19. Type of cooling used in Distribution transformer is
    • AN, OFN
    • OB, AB
    • AN
    • AN, ON

  20. Fluorescent lamp is a
    • High pressure mercury vapour lamp
    • Low pressure mercury vapour lamp
    • High pressure sodium vapour lamp
    • Arc lamp

  21. When Dynamo meter type meters are used as watt meters, the fixed and movable coils are
    • Both coils are movable
    • Fixed coil is current coil and moving coil is pressure coil
    • Fixed coil is pressure coil and moving coil is current coil
    • Can be arranged as either current coil is fixed and pressure coil movable and vice-versa

  22. The distance between earth electrode and adjacent building should not less than
    • 2 m
    • 1 m
    • 5 m
    • 1.5 m

  23. G series MCB's are used for protecting
    • Resistive load
    • All of these
    • Inductive load
    • Capacitive load

  24. The major cause of creeping error in induct in type energy meter is
    • Vibration
    • Stray magnetic field
    • Over compensation friction
    • Over voltage

  25. The most commonly used AC motor is
    • Squirrelcage induction motor
    • Slip ring induction motor
    • Universal motor
    • Repulsion motor

  26. For getting maximum efficiency in a sodium vapour lamp the lamp temperature to be maintained about
    • 150°c
    • 220°c
    • 380°c
    • 320°c
    Question error

  27. FET is a
    • voltage control device
    • current controlled device
    • bipolar device
    • power control device

  28. The minimum horizontal clearance between when the line passing through adjesent building is
    • 1.219 M
    • 1.112 M
    • 1.713 M
    • 3.962 M

  29. The commercial method of making Permanent Magnet is
    • Induction method
    • Divider touch method
    • Single touch method
    • Double touch method

  30. Among the following which cable is used for Railway signaling purpose
    • Torpodure cable
    • PVC cable
    • Lead sheet cable
    • Armed cable

  31. Melting point of copper is
    • 2200° C
    • 660° C
    • 1083° C
    • 490° C

  32. The frequency equation of Hartley oscillator is
    • 1/(2 π √LCT)
    • 1/(2 π √(6RC))
    • 1/(2 π √CLT)
    • 1/(2 π √(LTCT))

  33. The capacity of cells are usually expressed in
    • Kilo watt hour
    • Ampere hour
    • Kilo volt ampere
    • Watt-hour

  34. Most efficient and effective damping method is
    • Eddy current damping
    • Air friction damping
    • All of these
    • Fluid friction damping

  35. Among them which motor has highest starting torque
    • Universal motor
    • Capacitor start induction run motor
    • Permanent capacitor motor
    • Shaded pole motor

  36. Copper loss of a transformer is 120 watt at it's 1/4th load watt will be the copper loss 1/8th full load
    • 64 watt
    • 30 watt
    • 192 watt
    • 240 watt

  37. To change DOR of Repulsion motor
    • change the supply terminal of motor
    • change the brush position of motor
    • all of these
    • change the motor terminals

  38. Among them which material is shows strong Dia magnetism
    • Aluminum
    • Copper
    • Bismuth
    • Silver

  39. Nickel iron cell is also known as
    • Junger cell
    • Primary cell
    • Edison cell
    • Voltaic cell

  40. The main purpose Twin Tube connections in a industries to
    • Get more light
    • Avoid stroboscopic effect
    • Avoid glair
    • All of these

  41. Resistance above _________ Ω is called high resistance.
    • 10000 Ω
    • 100000 Ω
    • 1000000 Ω
    • 10000000 Ω

  42. The yoke of large DC machine is made of
    • soft iron
    • cast steel
    • wrought iron
    • cast iron

  43. Fourth colour band of a resistance is brown in four colour band system, the tolerance of the resistance is
    • 2%
    • 5%
    • 3%
    • 1%

  44. Nickel Iron cell are widly used in Aircraft engineering because of its
    • High efficiency
    • Good mechanical strength
    • Heavy rate discharging capacity
    • High voltage

  45. XLPE cable is a type of cable. XLPE stands for
    • Cable-Linked Poly Ethylene Cable
    • Cross-Linked Poly Ethylene Cable
    • Cross-Linked Poly Ester Cable
    • Cable-Linked Poly Ester Cable

  46. Silver plated mica capacitors are best suited for ______ application.
    • High voltage application
    • Radio frequency application
    • High frequency application
    • Power factor correction

  47. The maximum safe temperature can with stand class H insulating material is
    • 155° C
    • 200° C
    • 120° C
    • 180° C

  48. The speed control method used in domestic mixer grinder is
    • tapped field control method
    • all of these
    • adding series resistance
    • voltage control method

  49. When Induction motor are started with star-delta starter the voltage applied across the winding when put in star position is
    • 75 %
    • 67.70 %
    • 50 %
    • 57.70 %

  50. The cells of 2 volt and each having an internal resistance of 0.2 Ω are jointed in series. If 10 Ω external resistance is connected accross the circuit, what will be the current flowing through the
    • 1.5A
    • 1.67A
    • 2A
    • 1.8A
    Question error

  51. Unit of inductive reactance is
    • Coloumb
    • Ohm
    • Fared
    • Henry

  52. In Geyser the type of insulation provided in between the inner and outer chamber is
    • Glass wool
    • Rubber
    • Asbestose
    • Mica

  53. A semiconducting material numbered as BC 149, the device is
    • Silicon transistor
    • Germanium transistor
    • Silicon diode
    • Silicon photo diode

  54. A circuit contain R and L in series, R = 8 Ω and  L = 0.02 henry, what will be the power factor of the circuit when is connected across 50 Hz, 50 volt ac supply
    • 0.821
    • 0.786
    • 0.752
    • 0.886

  55. The purpose of bedding provided in cable is
    • Protect the cable from mechanical injury
    • Protect metallic sheet from mechanical injury
    • Protect the cable from atmosphere
    • Prevent entering moisture to the cable

  56. The speed of DC shunt motor is drops slightly from no load to full load is due to
    • IaRa drop in armature
    • Increase in back emf
    • Increase in field flux
    • Decrease in field flux

  57. Double squirrel cage Induction rotors are used in Induction motors for getting
    • Smooth operation
    • High starting torque
    • High power
    • Avoid magnetic locking

  58. A 50 volt meter want to be extend to measure 250 volt meter. The resistance of the meter is 5000 Ω, what will be the value of multiplier required
    • 50000 Ω
    • 20000 Ω
    • 25000 Ω
    • 40000 Ω

  59. The out put of harmonic oscillators is
    • Square wave
    • All of these
    • Triangular wave
    • Sine wave

  60. Regenerative braking is possible when the speed of the motor is
    • Above synchronous speed
    • Bellow synchronous speed
    • Same as synchronous speed
    • All of these

  61. The type of capacitor used in capacitor start induction run motor is
    • Paper Capacitor
    • Mica Capacitor
    • Ceramic Capacitor
    • Air Capacitor

  62. Widly used semiconducting material is
    • Germanium
    • Silicon
    • Carbon
    • Bismuth

  63. V-curve of a synchronous motor is the relation between
    • supply voltage and current
    • field voltage and field current
    • armature voltage and armature current
    • armature current and field current

  64. The type DC generator used for electoplating is
    • shunt generator
    • series generator
    • cumulative compound generator
    • long shunt compound generator

  65. The type of DC compound generator used for arc welding is
    • Under compound generator
    • Level compound generator
    • Differential compound generator
    • Over compound generator

  66. The joint used in over head line where for increasing the length of conductor where considerable tensile stress acted is
    • T-Joint
    • Western Union Joint
    • Brittania Joint
    • Married Joint

  67. Over load coil of 3 point DC motor starter is connected
    • in series with shunt field
    • in series with armature coil
    • in parallel with series field
    • in parallel with shunt field

  68. The type of file used in ordinary filing purpose is
    • Second cut
    • Smooth
    • Bastard
    • Rough

  69. In a safety sign, It's shape is circular, red border and cross bar black signal in white background the sign is
    • Prohibition sign
    • Mandatory sign
    • Information sign
    • Warning sign

  70. In a winding the number of coils/pole/phase is one, the winding is called
    • Whole coil winding
    • Distributed winding
    • Concentrated winding
    • Balanced winding

  71. Polarisation is the problem of _______ type of cell.
    • Nickel iron cell
    • Lead acid cell
    • Voltaic cell
    • Dry cell

  72. Fusing factor of HRC fuse is
    • 1.2
    • 1.4
    • 1.3
    • 1.1

  73. A moving coil volt meter shows 220 volt when it is connected across an AC supply. What will be the voltage shows when it is measured using CRO ?
    • 311 V
    • 220 V
    • 380 V
    • 244 V

  74. In semi direct lighting system _________ % of light reaches to the working plane.
    • 50 – 90 %
    • 60 – 90 %
    • 90 – 100 %
    • 10 – 40 %

  75. Buchholz relay is a
    • Electronic relay
    • Thermal relay
    • Gas operated relay
    • Phenumatic relay

  76. Three phase two element watt meter method is best suited for the measurement of power in
    • Three phase unbalanced load
    • Three phase balanced load
    • None of these
    • Three phase balanced and unbalanced load

  77. Solar cell is a
    • Thermister
    • Varactor diode
    • Photo resistor
    • Photo diode

  78. In EHT line the maximum permissible voltage drop is
    • 12.50 %
    • 5 %
    • 10 %
    • 3 %

  79. The process by which isolate the supply of oxygen to the fire is known as
    • cooling
    • smothering
    • starving
    • extinguishing

  80. Valancy of aluminum atom is
    • 2
    • 1
    • 4
    • 3

  81. The book 'Poverty and Progress' is authored by
    • Proudhon
    • Karl Marx
    • Deepak Lal
    • Deepak Chandra

  82. "They may call me Hitler, they may call me a Supper-Hitler" Whose words are this
    • Vallabhai Patel
    • Subhash Chandra Bose
    • Mussolini
    • Indira Gandhi

  83. The Chairman of the fourteenth Finance Commission of India is
    • Dr.Y.V. Reddy
    • Urjit Patel
    • Dr.S.R. Reddy
    • L.N. Reddy

  84. Who called 'Volga' as "The Queen of our rivers"
    • Alexandre Dumas
    • Maxim Gorky
    • Lenin
    • Stalin

  85. The total number of domestic passengers handled at the Indian airports during 2014 – 15 was
    • 125.53 Million
    • 201.43 Million
    • 101.34 Million
    • 151.34 Million

  86. The total number of Post Offices in India is about
    • 155015
    • 200050
    • 300000
    • 100012

  87. Jati Nasini Sabha was founded by
    • Swami Ananda Theerthan
    • Brahmananda Sivayogi
    • Vagbhadananda
    • Sree Narayana Guru

  88. "His spirit will always prevail in India" was a famous remark made on 15th December, 1950 at London by
    • Jawaharlal Nehru
    • Lord Mountbatten
    • Winston Churchill
    • Dr. Rajendra Prasad

  89. The famous remark that John F. Kennedy and Richard M. Nixon lacked 'Political brains' was made in a speech delivered at United Nations by
    • Jawaharlal Nehru
    • Khrushchev
    • Fidel Castro
    • Fulgencio Batista

  90. Who declared that "Political freedom is the life breath of a Nation" ?
    • Sury Sen
    • Aurobindo Ghosh
    • Subhash Chandra Bose
    • Bhagat Singh

  91. The book, Of Fortunes and War : Clare Hollingworth is authored by
    • Jim Mc Curry
    • Patrick Garret
    • Clare Hollingworth
    • Pessy Hull

  92. "A day will come when India also remember her and cherish her" was the words of Jawaharlal Nehru about
    • Kamala Nehru
    • Sarojin Naidu
    • Captain Lakshmi
    • Rani Gaidilieu

  93. The first Secretary of the Punjab Naujawan Bharat Sabha was
    • Bhagat Singh
    • Chandrashekar Azad
    • Sury Sen
    • Jatin Das

  94. Mahatma Gandhi founded the All India Harijan Sangh in
    • 1932
    • 1931
    • 1940
    • 1930

  95. Mangal Pande was hanged to death on
    • 29, March 1858
    • 29, March 1857
    • 20, March 1857
    • 20, March 1858

  96. Lord Dufferin ridiculed the Congress as "a microscopic minority of the people" in a public speech delivered in
    • 1886
    • 1888
    • 1887
    • 1885

  97. The newspaper Al Hilal was started in
    • 1912
    • 1910
    • 1920
    • 1940

  98. Mokshapradipam is a famous work of
    • Chattampi Swamikal
    • Vaikunda Swamikal
    • Brahmananda Sivayogi
    • Neelakantan Namboothiripad

  99. The present Chairman of Kerala Public Service Commission is
    • K. Radhakrishnan
    • Dr. K.S. Radhakrishnan
    • Salahuddin
    • M.K. Sakeer

  100. C. Kesavan was arrested and jailed on account his seditious speech delivered at Kozhenchery on
    • 25, March 193
    • 11, May 1935
    • 11, June 1936
    • 20, May 1936

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