Kerala PSC - POLICE CONSTABLE (TELECOMMUNICATION)
Exam Held On:- 14-02-2018
Question Booklet Alpha Code:- A
1. The Journal 'Sivayogavilasom' was published by :
Answer:- Vagabhadananda
Answer:- Mayyanad
Answer:- Qatar
Answer:- Saudi Arabia
Answer:- The Palghat pass
Answer:- Lakshadweep
Answer:- Kerala
Answer:- Gujarat
Answer:- Ayyankali
Answer:- Himachal Pradesh
Answer:- 1961
Answer:- Lala Lajpat Rai
Answer:- Khudiram Bose
Answer:- August 19
Answer:- Mumbai
Answer:- Mithali Raj
Answer:- Sree Narayana Guru
Answer:- 1937
19. Who was the first Vice President of SNDP Yogam?
Answer:- Dr Palpu
20. The effective border between India and the People’s Republic of China:
Answer:- LAC
21. Inverter converts :
(A) AC to DC (B) AC to AC
(C) DC to AC (D) DC to DC
(C) DC to AC (D) DC to DC
Answer:- (C) DC to AC
22. PIV in diode stands for :
(A) Peak Inverter Voltage
(B) Peak Ideal Voltage
(C) Peak Inverse Voltage
(D) Peak Individual Voltage
(A) Peak Inverter Voltage
(B) Peak Ideal Voltage
(C) Peak Inverse Voltage
(D) Peak Individual Voltage
Answer:- (C) Peak Inverse Voltage
23. Barrier Potential of Germanium diode is?
(A) 0.5V (B) 0.3V
(C) 0.7V (D) 0.6V
24. The resonance frequency occurs when :
(C) 0.7V (D) 0.6V
Answer:- (B) 0.3V
(A) C=L (B) XL=Xc
(Q) R=L (D) None of the above
Answer:- (B) XL=Xc
25. The common collector configuration is also known as :
(A) Collector follower (B) Base follower
(C) Gate follower (D) Emitter Follower
(A) Collector follower (B) Base follower
(C) Gate follower (D) Emitter Follower
Answer:- (D) Emitter Follower
26. The terminals of a FET are :
(A) Dram Source, Gate (B) Gate, Cathode. Anode
(C) Base 1, Base 2, Emitter (D) Cathode, Anode, Source
(A) Dram Source, Gate (B) Gate, Cathode. Anode
(C) Base 1, Base 2, Emitter (D) Cathode, Anode, Source
Answer:- (A) Dram Source, Gate
27. The package of digital IC 7400 series is :
(A) DTL (B) CMOS
(C) TTL (D) None of the above
(A) DTL (B) CMOS
(C) TTL (D) None of the above
Answer:- (C) TTL
28.The Aspect ratio of Indian TV system is :
(A) 4:3 (B) 4:9
(C) 5:5 (D) 16:5
Answer:- (A) 4:3
29. One nibble contains :
(A) Two bits (B) Four Bits
(C) Eight bit (D) 16 bit
Answer:- (B) Four Bits
30. The capacity of DVD :
(A) 700 MB (B) 1 GB
(C) 40 GB (D) 4.7 GB
Answer:- (D) 4.7 GB
31. The feedback used in the amplifier is :
(A) Positive (B) Negative
(C) Both (D) All of the above
Answer:- (B) Negative
32. The value of capacitor 103 is :
(A) 0.01 mF (B) 0.001 mF
(C) 1 mF (D) 0.0001 mF
Answer:- (A) 0.01 mF
33. In the following 3-pin IC, which gives negative regulated voltage 15v?
(A) 7815 (B) 7805
(C) 7905 (D) 7915
Answer:- (D) 7915
34. Which speaker is used for Mid-range frequency response?
(A) Squawker (B) Woofer
(C) Tweeter (D) Wide range
Answer:- (A) Squawker
35. The Oscillator generating high-frequency oscillation in the range of 1MHz to 500MHz :
(A) Phase shift (B) Hartley
(C) Wein Bridge (D) All of the above
Answer:- (B) Hartley
36. The velocity of the Electromagnetic wave was :
(A) 3x10^8 m/s (B) 3x10^12 ccm/s
(C) 4x10^4 miles/s (D) 3x10^2 m/s
Answer:- (A) 3x10^8 m/s
37. The primary colours in the CTV system are:
(A) RGB (B) RYC
(C) RBO (D) RMC
Answer:- (A) RGB
38. In an Oscillator circuit -------- is very important.
(A) Tank circuit (B) Feedback
(C) Amplifier (D) All of the above
Answer:- (D) All of the above
39. The system used in India for colour TV transmission is :
(A) NTSC (B) SECAM
(C) PAL (D) None of these
Answer:- (C) PAL
40. The separation of sound and picture carrier in Indian TV system :
(A) 1MHz (B) 4.5 MHz
(C) 7MHz (D) 5.5MHz
Answer:- (D) 5.5MHz
41. Length of the dipole in yagi antenna is--------------
(A) 143/f (B) 152/f
(C) 137/f (D) 163/f
Answer:- (A) 143/f
42. The purpose of saw filters in TV receivers is
(A) To produce a sawtooth signal
(B) To replace the wave trap circuit
(C) To produce horizontal deflection
(D) To produce vertical deflection
Answer:- (B) To replace the wave trap circuit
43. Ripple factor of half wave rectifier is
(A) 1.21 (B) 0.48
(C) 40.6 (D) 812
Answer:- (A) 1.21
44. Input Impedance of emitter follower is
(A) Low (B) Zero
(C) High (D) Unity
Answer:- (C) High
45. ---------- shows negative resistance characteristics.
(A) Zener Diode (B) Power Diode
(C) LED (D) Tunne1 Diode
Answer:- (D) Tunne1 Diode
46. Unit of magnetomotive force is---------.
(A) Ampere-hour (B) Ampere Turns
(C) Weber (D) Gauss
Answer:- (B) Ampere Turns
47. RMS value of AC is -------.
(A) 230 V (B) 0.707 Vm
(C) 1.41 Vm (D) 0 637 Vm
Answer:- (B) 0.707 Vm
48. The inductive reactance value -------- with the increase in the frequency of applied voltage.
(A) Does not change (B) Increase
(C) Decreases (D) Become Zero
Answer:- (B) Increase
49. IC ------ is an 8 line multiplexer.
(A) 74138 (B) 7408
(C) 74151 (D) 7486
Answer:- (C) 74151
50. The peak inverse voltage for Bridge rectifier is -----------
(A) Vm (B) 2Vm
(C) 4Vm (D) Zero
Answer:- (A) Vm
51. Etching solution for PCB is made by -------------
(A) Sodium Chloride (B) Isopropyl Alchohol
(C) Ferric Chloride (D) None of the above
Answer:- (C) Ferric Chloride
52. ---------- feedback is used in amplifiers:
(A) Positive (B) Negative
(C) Both (A) and (B) (D) None of the above
Answer:- (B) Negative
53. LM 317 is ---------
(A) an operational amplifier (B) a timer IC
(C) a digital IC (D) a regulator 1C
Answer:- (D) a regulator 1C
54. The current rating of the lead acid battery is expressed in -------
(A) Ampere-turns (B) Ampere Ohms
(C) Ampere-hour (D) HP
Answer:- (C) Ampere-hour
55. The bandwidth of an ideal OP-Amps is--------
(A) Infinity (B) Zero
(C) Unity (D) None Of the above
Answer:- (A) Infinity
56. --------microphones require a DC voltage for its Operation.
(A) Crystal (B) Moving Coil
(C) Ribbon (D) Carbon
(A) Crystal (B) Moving Coil
(C) Ribbon (D) Carbon
Answer:- (D) Carbon
57. The cut off frequency of RC lowpass filter is ---------
(A) RC (B) 1/2 x 3.14 x LC
(C) 1/2 x 3.14 x RC (D) 1/RC
58. In 8085 microprocessor stack pointer is a --------- bit register.
(A) One (B) Four
(C) Eight (D) 16
Answer:- (C) 1/2 x 3.14 x RC
(A) One (B) Four
(C) Eight (D) 16
Answer:- (D) 16
59. The thickness of the LC layer in LCD is expressed in ---------
(A) Millimeter (B) Centimeter
(C) Micrones (D) Inch
(A) Millimeter (B) Centimeter
(C) Micrones (D) Inch
Answer:- (C) Micrones
60. Convert (5A)16 into an octal number:
(A) (132)8 (B) (123)8
(C) (321)8 (D) (312)8
(A) (132)8 (B) (123)8
(C) (321)8 (D) (312)8
Answer:- (A) (132) 8
61. Three resistance of 40, 30, 10 Ohms are connected in parallel, their combined resistance will be ---------
(A) greater than 40 Ohm
(B) between 40 Ohm to 30 Ohm
(C) between 30 Ohm to 10 Ohm
(D) less than 10 Ohm
(A) greater than 40 Ohm
(B) between 40 Ohm to 30 Ohm
(C) between 30 Ohm to 10 Ohm
(D) less than 10 Ohm
Answer:- (D) less than 10 Ohm
62. In electrical wiring, the light point allowed in one subcircuit is --------
(A) 15 (B) 10
(C) 8 (D) 2
(A) 15 (B) 10
(C) 8 (D) 2
Answer:- (B) 10
63. Temperature limit for class ’E’ insulation is --------
(A) 60°C (B) 120°C
(C) 180°C (D) 360°C
(A) 60°C (B) 120°C
(C) 180°C (D) 360°C
Answer:- (B) 120°C
64. Wheatstone bridge is used to measure---------
(A) Current (B) Capacitance
(C) Resistance (D) Power
(A) Current (B) Capacitance
(C) Resistance (D) Power
Answer:- (C) Resistance
65. An electric lamp is marked 100 Watt, 240 Volt, the resistance of filament will be -----------
(A) 576 ohm (B) 57 ohm
(C) 5760 ohm (D) 240 ohm
(A) 576 ohm (B) 57 ohm
(C) 5760 ohm (D) 240 ohm
Answer:- (C) 5760 ohm
66. A network which contains no Source of EMF in it is called -------
(A) Active network (B) Constant network
(C) Passive network (D) Resistive network
Answer:- (C) Passive network
67. In the B-H curve, ’B’ represents --------
(A) Magnetic flux density
(B) Magnetic field intensity
(C) Reluctance
(D) Magnetic flux
Answer:- (A) Magnetic flux density
68. The power factor of a purely resistive load is -------
(A) unity (B) 0.8
(C) 0.5 (D) zero
Answer:- (A) unity
69. In an AC circuit, an ammeter measures ------ value of current.
(A) Average value (B) Peak value
(C) RMS value (D) Minimum value
Answer:- (C) RMS value
70. To convert a moving coil galvanometer into an ammeter, it must connect -----------
(A) high resistance in series
(B) low resistance in series
(C) high resistance in parallel
(D) low resistance in parallel
Answer:- (D) low resistance in parallel
71. The speed of a shunt motor has to be controlled through the ’flux control method’, the suitable starter will be -------
(A) Direct On Line starter
(B) 2-point starter
(C) 3-point starter
(D) 4-point starter
Answer:- (D) 4-point starter
72. The wattmeter reading Of a transformer on open Circuit test is 600 Watt and on short circuit test at full load current is 1200 watt. What Will be the copper loss at half load?
(A) 1200 Watt (B) 800 Watt
(C) 300 Watt (D) 600 Watt
Answer:- (C) 300 Watt
73. The eddy current loss in the transformer occurs in -------
(A) Primary winding (B) core
(C) secondary winding (D) Supply side
Answer:- (B) core
74. The fixed coil in dynamometer type wattmeter is the --------
(A). Current coil (C) Power Coil
(C) Pressure Coil (D) None of the above
Answer:- (A). Current Coil
75. A wave winding is made in a machine for -------
(A) more voltage, more current
(B) less voltage, less current
(C) more voltage, less current
(D) less voltage, more current
Answer:- (C) more voltage, less current
76. The direction of induced EMF in a coil is found by ----------
(A) Faraday's law (B) Flemings left-hand rule
(C) Kirchoff’s law (D) Lenz’s law
Answer:- (D) Lenz’s law
77. The shunt type ohmmeter Will have zero reading at the -------
(A) the centre of the scale
(B) the left-hand end of the scale
(C) the right-hand end of the scale
(D) point specified by the manufacturer
Answer:- (B) left-hand end of the scale
78. The unit of luminous flux is ----------
(A) Lux (B) Candela
(C) Weber (D) Lumen
Answer:- (D) Lumen
79. Load factor is defined as the ratio of -----------
(A) Average load to Maximum Demand
(B) Maximum demand to Average load
(C) Average load to Connected load
(D) Connected load to Maximum Demand
Answer:- (A) Average load to Maximum Demand
80. The rotating magnetic field in a three-phase, 6 poles, 50 Hz slip ring induction motor will rotate at _________ speed.
(A) 300 RPM (B) 1000 RPM
(C) 1200 RPM (D) 1500 RPM
Answer:- (B) 1000 RPM
81. Which of the following devices can be used to directly image printed text?
(A) OCR (B) OMR
(C) MICR (D) All Of the above
(C) MICR (D) All Of the above
Answer:- (A) OCR
82. Who designed the first electronic computer ENIAC?
(A) Van-Neumann
(B) J. Presper Eckert and John W Mauchly
(C) Joseph M. Jacquard
(D) Charles Babbage
83. BCC stands for ---------
(B) J. Presper Eckert and John W Mauchly
(C) Joseph M. Jacquard
(D) Charles Babbage
Answer:- (B) J. Presper Eckert and John W Mauchly
(A) Basic carbon copy
(B) Blind Computer copy
(C) Blind combined copy
(D) Blind carbon copy
(D) Blind carbon copy
Answer:- (D) Blind carbon copy
84. CPU retrieves its data and instructions from --------
(A) Secondary Memory (B) Auxiliary Memory
(C) Main Memory (D) All of the above
(C) Main Memory (D) All of the above
Answer:- (C) Main Memory
85. A Web page can contain :
(A) Text (B) Image
(C) Video (D) All of the above
(A) Text (B) Image
(C) Video (D) All of the above
Answer:- (D) All of the above
86. The default alignment option of text in MS Word is --------
(A) Left (B) Right
(C) Center (D) Justify
(A) Left (B) Right
(C) Center (D) Justify
Answer:- (A) Left
87. Background colour or effects applied to a document is not visible in :
(A) Web layout view (B) Print Layout view
(C) Reading View (D) Print Preview
(A) Web layout view (B) Print Layout view
(C) Reading View (D) Print Preview
Answer:- (D) Print Preview
88. In a database table, the category of information is called -------
(A) Tuple (B) Field
(C) Record (D) All of above
(C) Record (D) All of above
Answer:- (B) Field
89. The protocol used in E-mail is ---------
(A) SMTF (B) SMTP
(C) FTP (D) WWW
(A) SMTF (B) SMTP
(C) FTP (D) WWW
Answer:- (B) SMTP
90. In Linux everything stored as a --------- :
(A) File (B) Directory
(C) Executables (D) None of these
(A) File (B) Directory
(C) Executables (D) None of these
Answer:- (A) File
91. ----------- can be used as a communication medium in a LAN.
(A) Coaxial cable (B) Twisted pair cable
(C) Fibre-optic cable (D) All of the above
Answer:- (D) All of the above
92. ____________ function translates a numeric value to a variable.
(A) Message (B) Build in
(C) Val (D) Mod
Answer:- (C) Val
93. A _______ is a device that forwards packets between networks by processing the routing information included in the packet.
(A) Bridge (B) Firewall
(C) Router (D) All of the mentioned
Answer:- (C) Router
94. Communication between a computer and a keyboard involves ----------- transmission.
(A) Automatic (B) Half-duplex
(C) Full-duplex (D) Simplex
(C) Full-duplex (D) Simplex
Answer:- (D) Simplex
95. Memory size of Boolean :
(A) 1 byte (B) 2 byte
(C) 3 byte (D) 4 byte
(A) 1 byte (B) 2 byte
(C) 3 byte (D) 4 byte
Answer:- (B) 2 byte
96. Which is an example of Visual basic objects?
(A) Control objects (B) ASP.Net
(A) Control objects (B) ASP.Net
(C) 3 ADO.Net (D) All of the above
Answer:- (D) All of the above
97. Which of the following dialogue boxes is used to give a warning message?
(A) Alert box (B) Input box
(C) Message box (D) None of the above
(A) Alert box (B) Input box
(C) Message box (D) None of the above
Answer:- (A) Alert box
98. A sequence of activities being Carried out to solve a program is known as :
(A) Output (B) Input
(C) Process (D) None of above
99. Execution of two or more programs by a single CPU is known as:
(A) Multiprocessing (B) Timesharing
(C) Multiprogramming (D) None of the above
100. Which of the following are the concepts of Information security?
(A) Access control (B) Integrity
(C) Confidentiality (D) All of the above
(A) Output (B) Input
(C) Process (D) None of above
Answer:- (C) Process
(A) Multiprocessing (B) Timesharing
(C) Multiprogramming (D) None of the above
Answer:- (C) Multiprogramming
(A) Access control (B) Integrity
(C) Confidentiality (D) All of the above
Answer:- (D) All of the above
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