ELECTRICIAN - AGRICULTURE.pdf (Size: 1.21 MB / Downloads: 1)

1.Repulsion motor is provided with
(A)Commutator (C ) Capacitor
(B) Centrifugal switch (D) Squirrel cage rotor

2.Whenever a poly phase motor is loaded the :
(A)induced emf in the rotor increases and its frequency falls
(B)induced emf in the rotor increases and its frequency rises
(C )induced in the rotor remains constant
(D)induced emf in the rotor decreases and its frequency increases

3.For three resistance are connected in three phase, the power consumed will be more in__________connection.
(A) star delta(B) star(C ) delta(D) delta-star

4.Synchronous motors run on leading power factor when connected in :
(A) under excitation(B) rated excitation
(C ) fullv loaded(D) over excitation

5.The out put voltage of a solar cell is approximately :
(A) 12 V(B)0.5 V(C )2.1 V
(H) 3 V

6.Slip rings are generally made of 
(A) phosphor bronze (C ) copper
(B) aluminum (D) carbon

7. The hydrometer reading of tully charged lead acid batten:
(A) 1.2(B)1.5(C ) 1.11
(D)1.26

8.In induction motor percentage slip is maximum at :
(A) low speed(B) medium speed
(C ) stand still condition(D) synchronous speed

9.Economiser is a part of:
(A) hydel PS(B) nuclear PS
(C ) thermal PS (D) diesel PS

10.The crawling in an induction motor is caused by :
(A)improper design of the machine (B)low voltage supply
(C )high load(D)harmonics developed in the motor

11.The commutator segments are placed in :
(A)rotor(B)stator(C )armature(D)field

12.Reduction in the capacitance of capacitor start motor results in reduced :
(A)noise(B)starting torque
(C )speed(D)armature reaction

13.In an ac circuit the ratio of kW/kVA represents :
(A)power factor(B)load factor(C )starting torque(D)diversityfactor

14. The unit of inductance is :
(A) OHM(B) MHO
(C ) HENRY
(D) FARAD

15.Ear to ear resistance of human body :
(A) 400(B)1 kilo ohms (C )650 ohms (D)100 ohms

16.Centrifugal sw itches is provided for disconnecting the auxiliary winding in a :
(A)capacitor run motor(B)capacitor start motor
(C )reluctance motor(D)hysteresis motor

17.Transformer core is laminated to :
(A)reduce the copper loss(B)reduces the eddycurrent loss
(C )reduces the core loss(D)hysteresis loss

18.Which type of loss is not common to transformer and rotating machines ? (A) eddy current loss(B) copper loss
(C ) hysteresis loss(D) windage loss

19.The difference between the synchronous speed and the actual speed of an induction motor is known as :
(A)slip(B)regulation(C )black lash(D)lag

20.Three resistances of 30, 15, 5, ohms are connected in parallel, their combined resistance will be:
(A)greater than 30 ohm(B)between 30 to 15 ohm
(C )less than 5 ohm(D)between 15 to 5 ohm

21.Which of the following acts as a depolarizer in a dry cell ?
(A)zinc chloride(B)carbon powder
(C )ammonium chloride(D)manganese dioxide

22.Efficiency of a power transformer is of the order of:
(A)50%(B)75%(C )98%(D)45%

23.The strongest dia-magnetic material :
(A)sulphur(B)bismuth(C )glass(D)graphite

24.The magnitude of torque developed by a three phase induction motor depends upon :
(A)rotor current, rotor emf. rotor pf
(B)supply voltage, stator current, frequency
(C )number of poles, speed, frequency
(D)synchronous speed, rotor speed, frequency

25.Rheostat method of speed control of induction motor is used in :
(A)squirrel cage LM (B)slip ringLM(C )double cage LM (D)all ofthe above

26.In a three phase IM the number of poles in the rotor winding are :
(A) zero(B) less than stator poles
(C ) equal to stator pedes(D) more than stator poles

27.If the air gap of induction motor is increased :
(A)the magnetizing current will increase
(B)the pf will increase
(C )speed of the motor will increase
(D)friction and windage loss will increases

28.Isolate fire from the supply of oxygen by blanketing it with foam, sand etc.
(A) starving(B) cooling(C ) spray water (D) smothering

29.What is the condition of ohm's law ?
(A) constant resistance(B) constant voltage
(C ) constant current(D) constant temperature

30.Power p®
(A)energy/time(B)energy/voltage(C )current/voltage(D)time/voltage

31.Moving coil instruments are use :
(A)ac only(B)both ac/dc(C )dc only(D)none of these

32.Low resistance means :
(A) up to 10 ohm (C )1000 ohm

33.Unit of resistivity :
(A) ohm(B) ohm-m

34.Kelvin bridge is used for measure :
(A) capacitance (C ) inductance

35.Resistivity of eureka at 20°C :
(A) 2.8 x 10-8 (B) 1.72X10-8
(B)1 ohm and below
(D) 500 ohm
C) ohm m2(D) ohm/m
(B) low resistance (D) insulation resistance
(C ) 49X10~8(D) 20.2 x 10"8

36. Application of series parallel combination :
(A) current divider(B) maximum resistance
(C ) power divider(D) voltage divider

37.An earthing electrode usually made of:
(A)PVC pipe(B)carbon plate(C‘)glass rod(D)

38.The color of protective conductor :
(A)green - yellow(B)green - red(C )green - blue(D)

39.The color of middle wire of 3 wire DC circuit is :
(A)red(B)black(C )blue(D)

40.Example of primary cell:
(A)Lead acid cell(B)Edison cell(C )Voltaic cell(D)

41.The amp-hour efficiency of lead acid cell :
(A)75%(B)90 - 95%(C )80 - 85%(D)60-60%

42.High rate discharge tester consists of:
(A) low range ammeter(B)
(C ) low range voltmeter(D)
high range voltmeter high range ammeter

43. The color of fresh Silica gell is : (A) Blue(B) Red
(C ) Black(D)Light pink color 

44. Imaginary line joining the two poles of a magnet:
(A) magnetic equator(B)magnetic pole
(C ) magnetic lines(D) magnetic field

45.Rotor copper loss of a three phase induction motor is :
(A)Fractional slip x input power to the rotor
(B)Fractional slip x output of the rotor
(C )Input power x output power (D) All the above

46.1 Metric horse power is :
(A) 742 W(B)735 W(C ) 735.6 W(D) 746 W

47.The back emf set up in the stator of a synchronous motor will depend on : (A) rotor speed only(B) stator speed only
(C ) rotor emf(D) rotor excitation

48.The armature Wdg of repulsion motor is excited :
(A) resistivelv(B) inductively (C ) conductively (D) capacitively

49.The mam disadvantage of shaded pole motor :
(A) low-starting torque(B)little over load capacity
(C ) low efficiency(D) all the above

50.The armature flux opposes the main flux is in synchronous machine when the PF is : 
(A) unit)’(B) zero lagging (C ) zero leading (D) 0.8 lagging

51.Dielec tric strength of a medium is :
(A) Joules/m2 (B) Coulomb/m2 (C ) kV/mm
(D) Volt/m2

52. Electric intensity is expressed as : (A) webber(B) Volt/m
(C ) emf
(D) coulomb

53.Whenever two charges are separated there exist:
(A) magnetic field(B) electric field
(C ) electrostatic field(D) emf

54.Potential inside the hollow charged sphere :
(A)less than itssurface(B)greater than onits surface
(C )same as on its surface(D)zero

55.Capacitance in any circuit is opposition to :
(A)voltage(B)current flow
(C )any changein current(D)any change inpower

56.The simple measuring instrument used to transfer measurement from the steel rule to object :
(A)try-square(B)calliper(C )scriber(D)punch

57.2 ohm resistance having current of 2 A will dissipate the power of :
(A)8 W(B)8j(C )2 W(D)4W

58.If the diameter of a wire is doubled keeping the length constant the resistance :
(A) becomes one fourth(B) become twice
(C ) remains same(D) becomes 4 times

59.Which of the following is linear and bilateral element ?
(A) Semiconductor (B) resistor(C ) electron tube (D) transistor

60.Why accumulators are preferred to pr 
(A) they are bulk
(C ) they can be recharged

61.Sedimentation occurs in lead acid cell (A) over charging at high rate
(C ) no use for longer period

62.Kirchhoff's law are valid for :
(A) linear circuit
(C ) both linear and non-linear circuit
my cell in motor car ?
(B)they have high internal resistance
(D)all the above
to :
(B)over charging at slow rating
(D)slow charged rate
(B)non-linear circuit (D) passive circuit

63.The algebraic sum of all IR drops and emf in any closed loop of a network as per KVL is :
(A)+ve(B)zero(C )-ve(D)+ veor-ve

64.Form factor is the ratio of :
(A) average value/rms value(B) average value x rms value
(C )instantaneous value/rms value (D) rms value/average value

65.The power factor of the inductive load is :
(A)leading(B)lagging(C )unity(D)zero

66.A choke coil has :
(A) high inductive, high resistance (C ) low inductive, high resistance
(B) low inductive, low resistance (D) high inductive, low resistance

67.A choke is used for limiting current in :
(A) AC ckt only(B) DC ckt only
(C ) both AC and DC(D) either AC or DC

68.Impedance at series resonance circuit:
(A)maximum(B)average(C )minimum(D)all the above

69.Power factor is defined as :
(A)kVA/kVAR(B)kVA/kW(C )kW/kVA(D)kW/kVR

70.2 Wattmeter method measuring power, 2 meters read equal and opposite reading the load power factor :
(A)zero(B)0.5(C )unity(D)above0.5

71.The secondary current of 400 kVA, 11kV/433V, 3 phase transformer is about :
(A)420 A(B)533A(C )666.5A(D)840 A

72.The current rating of 400 mm2 AYFY cable is :
(A) 400 A(B)435 A(C )305 A(D) 335 A

73.The maximum efficiency of distribution transformer is :
(A) I/4th load(B) full load

74.Unit of luminous intensity :
(A) lumen(B) lux

75.The most efficient lamp :
(A) graphene
(C )CFL
(C )3/4th load(D) half load
(C ) candela(D) lumen/m
(B)LED
(D)sodium vapour lamp

76.The larger transformer stepped core arrangement is used to minimize the use of : 
(A) core(B) copper(C ) hysteresis loss (D) core loss

77.Examine the Commutator and brushes :
(A)weekly maintenance(B)monthly maintenance
(C )daily maintenance(D)yearly maintenance

78.In DC generator the voltage drop of copper-carbon brush is about:
(A) 1.6 V(B)2 V(C )1.75 V(D) 0.3 V

79.Alternator voltage regulation is determined by emf  method. It is due to :
(A)Rothert(B)Behn-Eschenberg
(C )Faraday(D)Pointer

80.The starting torque of capacitor start, capacitor run is about:
(A)200% of FL torque(B)50% of FL torque
(C )300% of FL torque(D)100% of FL torque

81.The first Director General of Archaeological Survey of India :
(A)Mountbatten(B)Alexander Cunningham
(C )Wheeler(D)Ernest Mackey

82.Name the first Indian to win the World Amateur Billiards Title.
(A)Wilson jones(B)Kamaljit Sandhu
(C )Ravi Shastri(D)K. Malleswari

83.In which place the Great Victoria Desert is located ?
(A) Canada(B)Africa(C )Asia(D)Australia

84.Name the Keralaruler whogave hiscountry to Sri Padmanabha as Tripadidana.
(A)Saktan Tampuran(B)Swati Tirunal
(C )Marthanda Varma(D)Rama Yarma

85.Who was known as Frontier Gandhi ?
(A)Abdul Kalam Azad(B)Muhammed Iqbal
(C )Khan Abdul Ghafar Khan(D)Patel

86.In which year MountbattenPlan wasannouncedin India ?
(A) 1947(B)1946(C )1945(D)1948

87.Director of the film "Tamas" explaining about partition of India :
(A)Satyajit Rai(B)Govind Nihalani
(C )Mrinali Sen(D)Narain Bharati
(D)1910

88. In which year Sadhujanaparipalanayogam established ? 
(A) 1903(B)1905(C )1907

89.Name the event which is related to Sav ama jatha.
(A)Shanar Agitation(B)Quit India Movement
(C )Attingal Revolt(D)Vaikkom Satyagraha

90.What is the name of spice which is called as "Yavanapriya" ?
(A)Ginger(B)Pepper(C )Cinnamon(D)Cardamom

91.Who was the Viceroy of India during the time of Round Table Conferences ?
(A)Lord Canning(B)Ramsay Mac Donald
(C )Lord Curzon(D)Lord Irvin

92.The First person who offer Individual Satyagraha in Indian Freedom Movement :
(A)Vinobha Bhave(B)Dr. B.R. Ambedkar
(C )Vallabhbhai Patel(D)Narendra Dutta

93.In Which Year Historic Lahore session of Indian National Congress held ?
(A)1919(B)1929(C )1930(D)1942

94.Which is the Name of Commission sent to India to enquire about the work of Govt of India Act of 1919 ?
(A)Crips Mission(B)Wardha Commission
(C )Simon Commission(D)Cabinet Mission

95.Which is the birth place of Mar Kuriakose Eliias Chavara ?
(A)Bharanaganm (B)Mannanam(C )Mezhathur(D)Kainakari

96.Pattanam was situated in the banks of river____
(A)Pamba(B)Bharatapuzha(C )Periyar(D)Kurumali puzha

97.The Yarkungzangbo river in India is known as_______.
(A)Brahmaputra(B)Mahanadi(C )Kaveri(D)Sindhu

98.The Power to Prorogue the Lok Sabha rests with________.
(A)Speaker(B)President(C )SupremeCourt (D)Prime minister

99.Whois the Founder of Samatwa Samaj ?
(A)Chattampi swamikal(B)Ayyankali
(C )Vaghbhatananda(D)VaikundaSwamikal

100.The Political Guru of Mahatma Gandhi :
(A)Gokhale(B)Tilak
(C )Surendra Nath Banerjee(D)DadabhaiNaoroji