TRADESMAN - WIREMAN - TECHNICAL EDUCATION_1.pdf (Size: 1.28 MB / Downloads: 2)

1. Which of the following fire extinguisher is suitable for a live electrical fire?
(A) Halon(B)Water
(C ) Foam(D)Liquefied chemical

2.The pliers used to make wire hooks and loops is :
(A) Combination pliers(B)Long nose pliers
(C ) Round nose pliers(D)Flat nose pliers

3.When temperature of carbon increases, its resistance?
(A) Decreases(B)Increases
(C ) Remains same(D)None of these

4.The specification of a given screwdriver is (75 mm x 0.4 mm x 2.5 mm) 0.4 mm stands
(A) Length(B)Thickness of tip of blade
(C ) Diameter(D)Handle length

5.The unit of Specific resistance is :
(A) Ohm - meter(B)Ohm / meter
(C ) Ohm(D)None of theseNone of these

6.The unit of dielectric strength is:
(A) kV/mm(B)kW/mm
(C ) Ohm/mm(D)Ampere

7.The resistance of 100W, 250V electric lamp is :
(A) 62.5 Ohms(B)625 Ohms
(C ) 6250 Ohms(D)325 Ohms

8.Three 30 ohms resistors are connected in parallel. The effective resistance of the combination will be:
(A)10 Ohms(B)90 Ohms
(C )25 Ohms(D)15 Ohms

9.Three resistors 27 ohms, 47 ohms and 68 ohms arc connected in parallel. What is the total resistance?
(A)Less than 27 ohms(B)Greater than 68 ohms
(C )Between 27 and 47 ohms(D)None of these

10.The type of watt meter suitable to measure DC power is :
(A)Induction type(B)Dynamo meter type
(C )LPF type(D)None of these

11.If the area of a metal wire of a given length is doubled, its resistance will be :
(A)Doubled(B)Halved
(C )Remains same(D)Four times more

12.Which one of the following is called as valance electron in an atom?
(A) No. of electrons in inner orbit(B) No. of electrons in the N shell
(C ) No. of electrons.in the outer most orbit(D) No. of electrons in the M shell

13.Interpoles are connected in :
(A) Series with armature (C ) Parallel with armature
(B) Series with field (D) None of these

14.In three phase delta connection, line voltage is (A) Rv^
(C ) Same as phase voltage
(B) v^R
(D) Same as line current

15.Cells are connected in series to get: (A) More voltage (C ) More power
(B) More current (D) None of these

16. No load test on a transformer is conducted to measure :
(A) Copper loss(B)Core loss
(C ) Total loss(D)Efficiency

17.1 micro ohm isohm.•
(A) 1/1000000(B)1/100000
(C ) 1/10000(D)1/10001/1000

18.In SI unit one coulomb of electricity corresponds to a quantity of electrons about:
(A) 6.24x10'8(B)6.24 106.24 x10s
(C ) 62.4 x10sCD)62.4 xlO18

19.Which of the following does not depend on the resistance of a conductor?
(A) Length(B)MaterialMaterial
(C ) Voltage(D)TemperatureTemperature

20.Which of the following material have negative temperature coefficient of resistance?Which of the following material have negative temperature coefficient of resistance?
(A) Copper(B)AluminiumAluminium
(C ) Tungsten(D)CarbonCarbon

21.How many 6 volt lamps are required to make a decorative serial set of operating voltage of 240 V?
(A) 38(B)40
(C ) 42(D)3636

22.What is the use of Eureka wire?
(A) Rheostat(B)Heating elementHeating element
(C ) Earth wire(D)Winding wire Winding wire

23.Which is not a property of an insulator?
(A) High heat conductivity(B)High permittivityHigh permittivity
(C ) High dielectric strength(D)High mechanical strengthHigh mechanical strength

24. in Leclanche cell manganese dioxide acts as :
(A) Positive electrode(B)Negative electrode
(C ) Depolarizer(D)Electrolyte

25.Positive electrode in a dry cell is :
(A) Zinc(B)CopperCopper
(C ) Carbon(D)None of theseNone of these

26.In a lead acid battery 6 positive electrodes are there. The numbers of negative plates are:
(A) 4(B)5
(C ) 7(D)88

27.The capacity of the storage battery is expressedin :
(A) Voltage rating(B)Ampere rating Ampere rating
(C ) Ampere-hour rating(D)GraphiteNone of these

28.Permanent magnets are made from :
(A) Soft iron piece(B)Alnico
(C ) Nichrome(D)GraphiteGraphite

29.The material slightly repelled by a magnet is called:
(A) Magnetic(B)Paramagnetic
(C ) Diamagnetic(D)FerromagneticFerromagnetic

30.The unit of magnetic reluctance is :
(A) Ampere-turns(B)Weber / m2
(C ) Ampere turns / Weber(D)None of theseNone of these

31.Tesla is the unit of:
(A) Flux(B)Flux density
(C ) MMF(D)ReluctanceReluctance

32.The rule used to determine the direction of induced current in a dc generator :
(A) Fleming's left hand rule'(B)Lcnz's law
(C ) Right hand thumb rule(D)Fleming's right hand rule

38. Split rings are made from :
(A) Gun metal(B) Brass
(C ) Hard drawn copper(D) Bronze

34. The winding have many turns of thin wire in dc generator is :
(A) Series field winding(B)Armature winding
(C ) Shunt field winding(D)None of these

35.The dc generator used for welding purpose is :
(A) Cumulative compound(B)ShuntShunt
(C ) Differential compound(D)Series

36.The type of dc motor used for traction purposeis:
(A) Shunt motor(B)Long shunt motor
(C ) Series motor(D)Short shunt motorShort shunt motor

37.The connection of no volt coil in dc 3 point starter across dc supply is in series with:The connection of no volt coil in dc 3 point starter across dc supply is in series with
(A) Armature(B)Starting resistor Starting resistor
(C ) Over load relay(D)Shunt fieldShunt field

38.Ward- Leonard system of speed control is usedin dc shunt motor to get:
(A) Above normal speed only(B)Below normal speed only
(C ) From zero to desired value(D)Normal constant speed

39.The fuse unit is made from :
(A) Bakelite(B)porcelainPorcelain
(C ) Ceramic(D)IronIron

40.The joint used in over head lines for extending the length is :
(A) Rat tail joint(B)Married jointMarried joint
(C ) Western union joint(D)Aerial tap joint

41.As per IK Rules how much load is permitted in a power sub circuit:
(A) 2500 W(B)4000 W
(C ) 3000 W(D)5000 W

42. The colour used for neutral wire in supply system is :
(A) Blue(B)BlackBlack
(C ) Yellow(D)GreenGreen

43.The recommended length of pipe used as earth electrode is :
(A) Not less than 2.25m(B)Not less than 2.5mNot less than 2.5 m
(C ) • Not less than 2m(D)None of these

44.The size of the plate used for earthing electrode is :•
(A) 60 cm x 60 cm(B)50 cm x 50 cm
(C ) 45 cm x 45 cm(D)40 cm x 40 cm

45.The test used to check whether the switches are connected in live wire or not is :
(A) Continuity test(B)Earth test
(C ) Polarity test(D)Insulation test

46.2 pin sockets should not be used indomestic wiring unless the appliance to be connected
(A) Double earthed(B)Double insulated
(C ) Controlled by ELCB(D)Controlled by MCB

47.Ikms value is equal to :
(A) 0.637 IMAX(B)0.707 IMAX
(C ) 6.371MAX(D)7.07 IMAX

48.Form factor of a sinusoidal wave is:
(A) 11.1(B)1.11
(C ) 0.111(D)None of these

49.The unit of inductive reactance is :
(A) Henry(B)Ohm
(C ) Ampere turn(D)Susceptance

50.The phase difference between any two adjacent phases in a three phase system is
(A)90°(B)120°
(C )180°(D)360°

51.To provide inductance in a circuit which is used?
(A)Resistor(B)ChokeChoke
(C )Capacitor(D)All of theseAll of these

52.In which load power factor may be unity?
•(A)Inductive reactance with resistance(B)Non inductive resistance
(C )Capcitive reactanceCapacitive reactance(D)None of theseNone of these

53. The reciprocal of impedance is :
(A)Susceptance(B)Conductance
(C )AdmittanceAdmittance(D)InductanceInductance

54.The effect of low power factor in an electrical system is :
(A) Efficiency will be more(B) Current will be increased
(C ) Current will be reduced(D) None of these

55.In a 3 phase system voltage across phase to phase is called :
(A) Phase voltage(B) Line voltage
(C )EMF(D)Terminalvoltage

56.Line voltage of a star connected 3 phase circuit is 415 V. The phase voltage will be :
(A)415 V(B)210 V
(C )220 V(D)240 V

57.The formula for reactive power in a 3 phase system is :
(A) 3Vt I, Cosθ(B) %/3VJ,Cosθ
(C ) V3VJ,Sinθ(D) V3VPIpSinθ

58.The number of slip rings required for a rotating field type 3 phase alternator is :
(A) 2(B)3
(C ) 12(D)66

59.Alternators are rated in :
(A) KW(B)HP
(C ) KVA(D)KVAR

60.The speed of 6 pole 60 Hz alternator is :
(A) 600 rpm(B)1200 rpm1200 rpm
(C ) 1800 rpm(D)800 rpm800 rpm

61.Core loss in a transformer is constant during:
(A) Quarter load(B)Half load
(C ) Full load(D)All loadAll load

62.Condition for maximum efficiency of a transformer is :
(A) Copper loss is equal to iron loss(B) Copper loss is more than iron loss
(C ) Copper loss is zero(D) None of these

63.The full load copper loss in a transformer is 900 watts. What will be the copper loss at half load?
(A) 1300 W(B) 500 W
(C ) 225 W(D) 450 W

64.In which part of a transformer hysteresis loss will occur?
(A)Core(B)Windings
(C )Transformer oil(D)Conservator

65.The standard secondary rated voltage of a potential transformer is :
(A)150 V(B)110 V
(C )200 V’(D)75 V

66. The direction of rotation of stator magnetic field depends up on :
(A) Supply voltage(B)Type of stator windingType of stator winding
(C ) Phase sequence of the supply(D)All of theseAll of these

67.When speed of induction motor increases the rotor frequency will?
(A) Decreases(B)Increases
(C ) Remains constant(D)ZeroZero

68.Inching operation is also called as :
(A) Starting(B)Stopping
(C ) Braking(D)JoggingJogging

69.How many contactors are there in a fully automatic star delta starter?How many contactors are there in a fully automatic star delta starter?
(A) 1(B)3
(C ) 4(D)66

70.The device used to store electrical energy in the form of electro static energy is
(A) Inductor(B)Resistor
(C ) Thermistor(D)CapacitorCapacitor

71.The type of capacitor used in capacitor start motor is :
(A) Electrolytic capacitor(B)Ceramic capacitorCeramic capacitor
(C ) Disc capacitor(D)Mica capacitorMica capacitor

72.Universal motor is used in :
(A) Fan(B)Refrigerator
(C ) Jet pump(D)Food mixerFood mixer

73.The unit of sensitivity of meter is :
(A) Volt / ohm(B)Amp/ohm
(C ) Ohm / amp(D)Ohm / volt

74.Control spring used in an instrument is made from :
(A) Bronze(B)CopperCopper
(C ) Phosphor bronze(D)Brass

75.The unit of luminous flux is:
(A) Candela(B) LuxLux
(C ) Lumen(D)Lumen/watt

76.In the following which is not a passive component?
(A) Resistor(B)Capacitor
(C ) Transistor(D)InductorInductor

77.Which element is used as semiconductor material?
(A) Copper(B)PlasticPlastic
(C ) Silicon(D)Brass

78.What is the abbreviation of PILC cable?
.(A) Paper Insulated Length Core(B)Polymer Insulated Lead Core
(C ) Paper Insulated Lead Covered(D)None of theseNone of these

79.The size of the ceiling fan is generally expressed by its:
(A) Number of blades(B)Pitch anglePitch angle
(C ) Length of the blade(D)SweepSweep

80.Line insulators are made from :
(A) Mica(B)Porcelain clayPorcelain clay
(C ) Granite(D)Asbestos.

81.When the time in India is 10.30 AM, the time of Sri Lanka is?
(A) 10 AM(B)10.30AM10.30 AM_rs
(C ) 11AM(D)12.30PM12.30 PMi «„ V- “ ■-

82.The number of Union Territories in India :-
(A) 7(B)88
(C ) 9(D)1010

83.Which of the following states have no coastline?
(A) Gujarat(B)MaharashtraMaharashtra
(C ) Rajasthan(D)KarnatakaKarnataka*

84.14lh Indian Census was conducted in the year :
(A) 2001(B)1981
(C ) 1991(D)2011

85.Who is known as the ‘Grand Old Man of India’?
(A) Gopala Krishna Gokhale(B)Bala Gangadhar Tilak
(C ) Lala Lajpat Rai(D)Dadabhai Naoroji

86.'Discovery of India’ is authored by :
(A) R.P. Dutt(B)R.C. Dutt
(C ) V.D. Savarkar(D)Jawaharlal Nehru

87.The first women president of Indian National Congress :
(A) Annie Besant(B)Sarojini Naidu
(C ) Indira Gandhi(D)Sonia Gandhi

88.The historic 'Dandi March’ was in connection with :
(A) Non Co-operation Movement(B)Khilafat Movement
(C ) Quit India Movement(D)Civil Disobedience Movement

89.Which among the following is an east-flowing river inKerala?
(A) Periyar(B)Pambar
(C ) Chaliyar(D)Pamba

90.The Ezhimala Naval Academy is located in the district of:
(A) Thrissur(B)Kasargod
(C ) Kannur(D)KozhikodeKozhikode

91.Alathur Sidhasramam was founded by :
(A) Sree Narayana Guru(B)Brahmananda Sivayogi
(C ) Chattambi Swami(D)Kumara Guru

92.Prathyaksha Raksha Daiva Sabha was founded by :
(A) Pambadi John Joseph(B)M.C. Joseph
(C ) Poikayil Yohannan(D)Abraham Malpan

93. ‘Misrabhojanam’ or interdining was a method introduced by:
(A) Ayyanknli(B)K. Ayyappan
(C ) Pandit Karuppan(D)Vagbhadananda

94.The ‘Ezhava Memorial’ was prepared under the leadership of:
(A) Dr. Palpu(B)G.P. Pillai
(C ) K.P. Sankara Menon(D)K.P. Kesava Menon

95.The play 'Adukkalayil Ninnu Arangalhekku' exposedthe condition of women
(A) Nairs(B)Pulayas
(C ) Ezhavas(D)Nambuthiris

96.The present Vice Chairman of‘Niti Ayog’:
(A) Aravind Pangariya(B)Radha Mohan Singh
(C ) Bibek Debroy(D)Prabhat Patnaik

97.'Vyapam Scam’ is an admission and recruitment scam in the state of:
(A) Uttar Pradesh(B)Madhya PradeshMadhya Pradesh
(C ) Rajastan(D)Gujarat

98.The Copa America football tournament 2015 washeld in:
(A) Brazil(B)Argentina
(C ) Chile(D)UruguayUruguay

99.The famous scientist Stephen Hawking belongedto:
(A) America(B)Germany
(C ) France(D)England

100. The 2014 Nobel Prize for literature was won by :
(A) Mo Yan(B)Alice Munro
(C ) Patrick Modiano(D)Thomas Transtromer