TRADES MAN - ELECTRONICS - TECHNICAL EDUCATION-TVM-KTYM-KKD.pdf (Size: 1.21 MB / Downloads: 0)

172/2014
Maximum : 100 marks
Time : 1 hour and 15 minutes

1. The must suitable gate to chock whether the number of one’s in digital word is even or odd is:
(A) Ex-OR
(B)OR
(C ) NOR
(D)NAND

2.A capacitor acts as an open circuit in:,
(A)AC
(B)DC
(C )AC and DC
(D)None of these

3.Atomic weight is equal to:l
(A) Total number of electrons
(B)Sum of protons and electrons
(C ) Number of neutrons
(D)Sum of protons and neutrons

4.Solder is an alloy of:
(A) Tin and Lead
(B)Tin and Zinc
(C ) Tin and Aluminium
(D)Tin and Copper

5.The resistance of a conductor increases when its area of cross section is:
(A) Increases
(B)Decreases 
(C ) Halved
(D)Doubled

6.As a battery gets charged, the density of its acid will:
(A) Rise
(B)Fall
(C ) Remains stable
(D)Zero

7.The impedance at resonance of a series resonant circuit is:
(A) Maximum
(B)Reactive
(C ) Zero
(D)Minimum

8.Unit of susceptance is:
(A) Farad
(B)Admittance
(C )Mho
(D)Ohm

9.Kirchhoffs laws are applicable to:
(A)AC 
(B) AC and DC 
(C ) DC
(D) None of these

10.Audio frequency ranges from.......to......... 
(A)20 Hz - 20 KHz
(B) 2Hz - 20Hz 
(C )20 KHz-20 MHz
(D) 2KHz - 20 khz

11.Moving iron repulsion type instruments are used for measuring:
(A) AC and DC
(B) AC only
(C ) DC only
(D) None of these

12.------------ is used for measuring inductance value.•
(A) Wheat stone’s bridge
(B) Schering bridge
(C ) Resistance bridge 
(D) Maxwell s bridge

13.Wave length of 3GHz signal is: 
(A)3 Meter 
(B)3 KM
(C )10 cm
(D)10 KM

14.A current of 1.5 A is flowing through 120 D resistor, the power is:
(A)270 W
(B)220 W
(C )200 W
(D) 27 W

15.The device which converts one form of energy into another is called:
(A)Transmitter
(B)Transducer
(C ) Trans conductor
(D) - Trans converter

16.The class of amplifier operation characterized by the highest efficiency, high distortion
(A)Class A
(B)Class B
(C ) Class C’
(D) Class D

17.The local oscillator of a broadcast receiver is tuned to a frequency higher than the Incoming frequency is:*
(A)To allow adequate frequency coverage without switching
(B)’ To permit easier tracking
(C )To help the image frequency rejection
(D)None of these

18. Semi conductors like Silicon and Germanium are:
(A) Tetravalent
(B)Monovalent -
(C ) Trivalent
(D)Pentavalent

19.Tunnel diode works on:
(A) Positive Resistance, 
(B)Negative Resistance
(C ) Zero Resistance
(D)None of these

20.Current through a capacitive load —with respect to the voltage.
(A) Lead
(B)Lag
(C ) Inphase
(D)No Phase relation

21.Arsenic is aimpurity.
(A) Pentavalent
(B)Monovalent
(C ) Tetravalent
(D)Trivalent

22.Doping of a Semiconductor'— its electrical conductivity to a great extend.
(A) Increase
(B)Decrease
(C ) Does not Change 
(D)None of these

23.The ripple frequency of a half wave rectifier signal is -the input frequency.
(A) Same
(B)Half
(C ) Twice
(D)None of these

24.When a transistor is in cut- off the collector current will be?
(A) Maximum
(B)Minimum
(C ) Zero 
(D)None of these

25.The process of converting AC to DC is known as:
(A)Rectification
(B)Amplification
(C )Filtering
(D)Inverting

26. An Oscillator Circuit uses---------------feedback.
(A)Positive
(B)Negative
(C )Both (A) and (B)
(D)None of these

27. If the voltage gain of an amplifier is 100, then the gain in decibel is: (A) 20’
(B)100
(C ) 40
(D) 60

28. The transfer of current from one conductor to another without electrical connect ion:
(A) is not possible
(B) will produce heavy heat and arc
(C ) is by air gap transmission
(D) is by induction

29.The opposition offered by a coil to AC is called:
(A) Capacitive Reactance
(B) Inductive reactance
(C ) Impedance
(D) Resistance

30.Frequency response of an amplifier can be improved by-----------feedback.
(A) Positive
(B) Negative
(C ) Both (A) and (B),
(D) None of these

31.The resistance of a diode is------when it is forward biased.
(A) Maximum
(B) Minimum
(C ) Zero
(D) None of these

32.P-type semiconductor has excess of------------- charge.
(A) Positive.. 
(B) Negative
(C ) Both (A) and (B).
(D) None of these

33.Op-Amp has-------------output impedance.
(A) High
(C ) Infinity
(B) Zero-
(D) Low

34. Signal to noise ratio can be improved by......modulation
(A) AM
(B)FM
(C ) Pulse Modulation
(D)None'of these

35.100 micro farad is-Farad. 
(A) 0.1
(B)0.01
(C ) 0.0001.
(D)0.001

36.Unit of Capacitive reactance is: 
(A) Farad
(B)Micro farad
(C ) Ohm
(D)Henry

37.The turns ratio of a transformer for matching 8 Ω impedance to 2000 is:
(A) 1:1
(B)1:8
(C ) 1:5
(D)1:400

38.—amplifier is used as voltage amplifier.
(A) Transformer Coupled
(B)Direct Coupled.
(C ) LC Coupled
(D)RC Coupled

39.In BC 148 transistor ‘B’ stands for:
(A) Germanium
(B)Gallium arsenide
(C )  Cadmium Sulphide
(D)Silicon

40.Efficiency of Bridge rectifier is: 
(A) 40.6%
(B)50%
(C ) 100%
(D)81.2%

41.Ripple factor of half wave rectifier is:
(A) 0.48
(B)0.81
(C ) 1.21
(D)1,4

42.RMS value of sine wave is:,
(A) 0.707 Vm ,
(B)0.636 Vm
(C ) 1.1 Vm
(D)None of those

43.In a common emitter amplifier, the input and output signals are in 
(A)90°
(B)0°
(C )180°
(D)270°

44.Oscillator is used in radio receivers.
(A)—  Coilpitt's
(B)Tuned collector
(C ).Crystal
(D)Hartley

45. AVO meter is:
(A) Voltmeter 
(B) Ohmmeter
(C ) Ammeter 
(D) Multimeter

46. OA79 is a-------------— diode.
(A)Varactor diode
(B)Signal diode
(C )Tunnel diode
(D)Power diode

47.The front end of a TV receiver is:
(A) Tuner
(B)Picture tube
(C ) Video amplifier
(D)Audio amplifier

48.Channel bandwidth in TV as per CC1R Systemis:•
(A) 5 MHz
(B)6 MHz
(C ) 5.5 MHz
(D)7 MHz

49.Type of antenna for TV receiver is:
(A) Yagi antenna
(B)Loop antenna
(C ) Helical antenna
(D)None of these

50.The duration of vertical blanking pulsea is:
(A) 12 microseconds, 
(B)52 microseconds
(C ) 18.72 milliseconds
(D)1.28 milliseconds

51.The winding in yoke assembly is called: 
(A) Sine winding
(B)Bifllar winding
(C ) Cosine winding
(D)None of these

52.Audio signal in TV transmission is:
(A) AM
(B)FM
(C ) Phase modulation
(D)None of these

53.The vertical synchronizing pulses in TV occurs after every:
(A) Scanning Line
(B)Field
(C ) Frame
(D).None of these

54.In Class A amplifier the output current flows for 
(A) Half cycle
(B)of input signal. More than half cycle
(C ) Full cycle
(D)Less than half cycle

55.Base number of Hexadecimal number is: 
(A) 2
(B)8
(C ) 16
(D) 10

56.Unit of Resonant frequency is: 
(A) Hertz
(B)Farad
(C ), Henry
(D)Ohm

57.Colour code for 82Ω resistance is:
(A) Grey, Red, Brown
(B)Grey, Red, Black
(C ) Grey, Red, Silver
(D)Grey, Red. White

58.1C 7486 isgate. 
(A) NAND
(B)NOR
(C ) X-OR
(D)NOT

59.gate is equivalent to two switches in series.
(A) NOT
(B)NOR
(C ) OK
(D)AND

60.is a universal gate.
(A) AND
(B)NOT
(C ) OR
(D)NAND

61.The unit of electrical energy is:
(A) Watts
(B)KWH
(C ) Joule
(D)Joules/sec

62.are used to reduce ripples in powersupply circuits.
(A) Amplifiers
(B)Filters
(C ) Oscillators
(D)None of these

63.,The transistor was invented by:
(A) John Bardeen
(B)JL Beard
(C ) Faraday
(D)Edison

64.Reciprocal of conductance is:
(A) Resistivity
(B)Resistance 
(C ) Susceptance
(D)1mpedance

65.Push Pull amplifier operates in:
(A) Class A
(B)Class B
(C ) Class C
(D) None of these

66.A Flip-Flopstable state.
(A) 1
(B).2
(C ) No
(D)None of these

67.Varactor diodes are used in:
(A) Filter
(B)Tuner
(C ) Rectifier
(D)Detector

68.The hum in transformer is due to:
(A) ’Hysteresis Loss
(B)Eddy current loss 
(C )Copper Loss
(D)None of these

69.The fastest logic family is:
(A)RTL
(B)TTL
(C ) ECL 
(D)DTL

70.Matched pair transistors are used in:
(A) Oscillators
(B)Inverters
(C )Comparators
(D)Rectifiers

71.The magnetic tapes are made up of:
(A)Copper
(B)Nickel
(C )Ferromagnetic material
(D)Silicon

721 The gain of emitter follower is:
(A) >1’ 
(B)1
(C ) <1*
(D)None of these

73.The efficient method of speed control of ac motor is by using:
(A)Triac-Diac
(B)Diac-SCR 
(C )Trine-SCR
(D)None of these

74.The decimal equivalent of (5B)is   
(A)90
(B)91
(C )80
(D)81

75.According to Boolean algebra, A+A”--------------.
(A)1
(B)0
(C )A  
(D)2A

76.Clock frequency of 8085 microprocessor is:
(A)3 MHz
(B)5 MHz 
(C )A MHz
(D)8 MHz

77.8051 microcontroller IC has------------pins.
(A)16
(B)32
(C )40
(D)64

78.1 KB is--------------Bytes.
(A)1000
(B)1024
(C )1240-
(D). 1200

79.The current gain of common collector amplifier is:
(A)>1
(B)<1
(C )1
(D)Noneofthese

80.FET is a-----------controlled device.
(A) Voltage
(B) Current
(C ) Power
(D) None of these

81.On January 20, 2014 the Govt. Of India awarded the minority status to the: (A) Sikh Community
(B) Jain Community
(C ) Parsi Community
(D) Buddha Community

82.Who inaugurated India’s first monorail in Mumbai?
(A) Mallikarjun Khargc
(B) Dr. Manmohan Singh
(C ) Pranav Mukherjee
(D) Prithviraj Chavan

83.Who was the recipient of Indira Gandhi Prize for Peace, Disarmament and Development for 2013?.
(A) Luiz Inacio Lula Da Silva
(B) Ela Ramesh Bhutt
(C ) Ellen Johnson Sirleaf
(D) Angela Merkel

84.The winner of the Hero Hockey World League Final 2014:
(A) India
(B) England
(C ) Netherlands
(D) Newzealand

85.Who is the first to be chosen from the field of sports for the nation’s highest civilian award Bharat Ratna?
(A) Sachin Tendulkar
(B)Kapil Dev
(C ) Sunil Gavaskar
(D)M S Dhoni

86.The Venue of 55th ‘Kerala State School Kalolsavam’ is;
(A) Palakkad
(B)Ernakulam
(C ) Kottayam  
(D)Malappuram

87.The Mars Orbitcr Mission (MOM) is a mars orbiter launched in to Earth Orbit on:
(A) 1 November 2013
(B)5 November 2013
(C ) 30 November 2013
(D)28 October 2013

88.The Andaman groups of island is separated from the Nicobar groups of island by:
(A) 8 degree channels
(B)9 degree channels
(C ) 10 degree channels
(D)11 degree channels

89. National Blood Donation Day is:
(A) October 1
(B)September 21
(C ) March 24
(D)April 7

90.Floppy Disc Was invented by:
(A) Alan Shugart
(B)James T Russel
(C ) Tim Burners Lee
(D)Ray Tomlinson

91.'Mahiti is the K- governance Programme launched inthe state:
(A) Karnataka
(B)Kerala
(C ) Assam
(D)Andra Pradesh

92.The power to prorogue the Loksubha rests with:
(A) The Speaker
(B)The President
(C )The Prime Minister
(D)The Vice President

93.The headquarters of Kerala Forest Development Corporation Limited:
(A)Pathanamthitta
(B)Wayunad
(C )Idukki
(D)Kottayam

94.‘Karagam’ is a religious folk dance associated with the state:
(A)Andra Pradesh
(B)Karnataka
(C )Tamilnadu
(D)Kerala

95.Who introduced the system “A School along with every Church”?
(A) Poikayil Yohannan
(B)  Pandit Karuppan
(C ) Kuriakose Elias Chavara
(D) P X Panicker

96.The Philosophy of Brahmanandn Sivayogi is:
(A) Siva Rajayogam
(B) Kajayogam
(C ) Yogam
(D) Yogakshemam

97.'Kuttamkulam samaram, a temple entry struggle was related with:
(A) Guruvayoor Temple
(B) Koodal Manikyam Temple
(C ) Vaikam Temple
(D) Thirunavaya Temple

98.Mudichoodan Perumal was the real name of: 
(A) Ayya Vaikunda Swamikal 
(B) Thycaud Ayya Guru 
(C ) Dharma Raja
(D) Vagbhatanandu Guru

99.How many times Mahatma Gandhi visited Kerala?
(A) 2 times
(B) 3 times
(C ) 4 times
(D) 5 times

100.Who was the last Chief Minister of Thiru- Kochi?
(A) T K Naravana Pillai
(B) C Kesavan
(C ) Panampilly Govinda Menon
(D) Pattam A Thanupillai