EASY PSC | 48/2024/OL - Sub Inspector (Telecommunications) Answer Key

Question 1

Which of the following statements are correct about "Synod of Diamper" (Udayamperoor Sunhados) ?
i. Priests conference held at Udayamperoor to make the Christian church of Kerala closer to the pope of Rome.
ii. Udayamperoor is a town situated in Ernakulam District.
iii. The conference was presided over by Alexis de Menezes.
iv. It was an event in the history of Kerala during the Portuguese rule.

A

Only (i), (ii)

B

Only (i), (ii), (iii)

C

Only (i), (ii), (iv)

D

All are correct

Question 2

Who founded the "Vaala Samudaya Parishkarani Sabha" ?

A

Pandit K. P. Karuppan

B

Velukkutty Arayan

C

V. V. Govindan

D

N. Krishnan

Question 3

Which of the following statements are correct about Vakkom Abdul Khader Moulavi ?
i. Father of Muslim renaissance in Kerala.
ii. Founder of Swadeshabhimani News paper.
iii. Started Travancore Muslim Mahajana Sabha.
iv. Author of the book "Delhi Durbar".

A

Only (i), (ii)

B

Only (i), (ii), (iii)

C

Only (i), (ii), (iv)

D

All are correct

Question 4

Which among the following is the first printing press in Kerala ?

A

C. M. S. Press

B

Travancore Press

C

Deepika

D

Hindusthan Press

Question 5

Who was the founder of Samatwa Samajam ?

A

Kumaraguru

B

Brahmananda Sivayogi

C

Vaikunta Swamikal

D

M. C. Joseph

Question 6

Who is the father of the library movement in Kerala ?

A

P. Krishna Pillai

B

P. N. Panicker

C

Joseph Mundasseri

D

Sardar K. M. Panicker

Question 7

Which among the following is not written by Lalithambika Antharjanam ?

A

Agnisakshi

B

Kunjomana

C

Thulavarshapacha

D

Gosayi Paranja Katha

Question 8

Who among the following is not associated with Vaikom Satyagraha ?

A

T. K. Madhavan

B

C. Kesavan

C

K. Kelappan

D

K. P. Kesavamenon

Question 9

Who among the following made the famous Temple entry Proclamation ?

A

Sree Moolam Thirunnal

B

Sethu Lekshmi Bhai

C

Sree Chithira Thirunnal

D

Sree Visakham Thirunnal

Question 10

The Malayalam Daily Kerala Kaumudi was founded by

A

C. V. Kunjiraman

B

Dr. Palpu

C

M. Govindan

D

V. K. Panicker

Question 11

Who founded Sadhujana Paripalana Sangham ?

A

Ayyankali

B

Chattambi Swamikal

C

Sreenarayana Guru

D

Vagbhadanandan

Question 12

Which of the following statements are correct about Mannathu Padmanabhan ?
i. Ente Jeevitha Smaranakal is the auto biography of Mannathu Padmanabhan.
ii. First general secretary of Nair Service Society.
iii. Known as "Bharatha Kesari".
iv. Wrote Pancha Kalyani Niroopanam.

A

Only (i), (ii)

B

Only (i), (ii), (iv)

C

Only (i), (ii), (iii)

D

All are correct

Question 13

Who is the first editor of Bhashaposhini ?

A

Kandathil Varghese Mappila

B

S. Padmanabha Panicker

C

Kattakkayathil Cheriyan Mappila

D

Moorkoth Kumaran

Question 14

Which among the following is not written by Vaikkom Muhammed Basheer ?

A

Bhargaveenilayam

B

Jeevitha Nizhalpadukal

C

Balyakala Sakhi

D

Mindapennu

Question 15

How many times has the preamble of the Constitution of India been amended ?

A

1

B

2

C

3

D

4

Question 16

Which among the following articles of the Fundamental Rights in the Constitution of India cannot be suspended during National Emergency ?

A

14

B

21

C

21A

D

22

Question 17

Which of the following statements are correct about "Chief Justice of the Supreme Court of India" ?
i. Retirement age of the Chief Justice of the Supreme Court of India is 65 years.
ii. Salary of the Chief Justice of the Supreme Court of India is given from the contingency fund of India.
iii. The first Chief Justice of the Supreme Court of India is Harilal J. Kania.
iv. Y. V. Chandrachood is the longest serving Chief Justice of the Supreme Court of India.

A

Only (i), (ii)

B

Only (i), (ii), (iii)

C

Only (i), (iii), (iv)

D

All are correct

Question 18

Who was the first general secretary of Sree Narayana Dharma Paripalana Yogam ?

A

Kumaran Asan

B

N. Kumaran

C

T. K. Madhavan

D

N. Krishnan

Question 19

The President of India who declared National Emergency in India in 1975 ?

A

V. V. Giri

B

Fakrudeen Ali Ahammed

C

B. D. Jatti

D

Neelam Sanjeeva Reddy

Question 20

Who is known as the Jhansi Rani of Travancore ?

A

Sethu Parvathi Bai

B

Akkamma Cherian

C

Annie Mascarene

D

K. R. Gouri Amma

Question 21

The carrier is transmitted as full power but only one of the side bands is transmitted. This system is

A

DSBFC

B

SSBFC

C

SSBSC

D

VSB

Question 22

What is the effect of increasing its modulation depth to 100% in amplitude modulation process ?

A

No modulation

B

Under modulation

C

Low level modulation

D

Over modulation

Question 23

In FM, frequency deviation is doubled

A

Modulation is doubled

B

Carrier swing is halved

C

Modulation is halved

D

Modulation index is decreased

Question 24

In super heterodyne receiver, the output of mixer stage is

A

AF

B

RF

C

IF

D

VHF

Question 25

In FM system, the modulation index is equal to 1 (100%) for a frequency deviation of

A

100 KHz

B

75 KHz

C

50 KHz

D

25 KHz

Question 26

In FM radio receiver, the intermediate frequency is

A

455 KHz

B

1055 KHz

C

10.7 MHz

D

15.6 MHz

Question 27

Which one is not a limitations of Amplitude modulation

A

Low efficiency

B

Needs less audio power

C

Noisy reception

D

Limited operating range

Question 28

88 MHz to 108 MHz frequency range is used i

A

FM band

B

SW band

C

AM band

D

MW band

Question 29

Short wave radio transmission is done using

A

Ground wave propagation

B

Space wave propagation

C

Ground level radio wave

D

Sky wave propagation

Question 30

____________ is used for selecting desired station in radio receiver.

A

Zener diode

B

Gang capacitor

C

Crystal diode

D

Electrolytic capacitor

Question 31

In TV transmission

A

Both picture and sound are FM

B

Picture and sound both the signals are AM

C

Picture signal is AM and sound signal is FM

D

Picture signal is FM and sound signal is AM

Question 32

In the 625 line system, 2.5 line period (2.5 × 64 = 160 Micro seconds) has been allotted for the

A

Vertical sync pulses

B

Horizontal sync pulses

C

Horizontal blanking pulses

D

Line sync pulses

Question 33

For TV reception, Yagi uda antenna consists of

A

Reflector, dipole and LNB

B

Dipole, transponder and directors

C

Reflector, director and LNB

D

Dipole, reflector and directors

Question 34

The length of a transmitting antenna is kept proportional to the

A

Current of the signal to be radiated

B

Velocity of the signal to be radiated

C

Wavelength of the signal to be radiated

D

Amplitude of the signal to be radiated

Question 35

What is the characteristic impedance of RG 6U cable used for long line cable TV transmission ?

A

25 Ohm

B

50 Ohm

C

75 Ohm

D

100 Ohm

Question 36

What is a co-axial cable ?

A

A center wire inside an insulating material which is covered by a metal sleeve or shield

B

Two wires side-by-side held apart by insulating rods

C

Two wires twisted around each other in a spiral

D

Two wires side-by-side in a plastic ribbon

Question 37

In radio wave propagation, the Very High Frequency (VHF) range is

A

30 Hz − 300 Hz

B

300 KHz − 3000 KHz

C

30 MHz − 300 MHz

D

30 MHz − 3 GHz

Question 38

In the PAL color TV system, the color subcarrier frequency is ___________ way from the picture carrier.

A

38.9 MHz

B

33.4 MHz

C

5.5 MHz

D

4.433 MHz

Question 39

Antennas that transmit and receive radio waves in all directions equally known as

A

Bidirectional antenna

B

Omnidirectional antenna

C

Directional antenna

D

Yagi antenna

Question 40

What are the primary and secondary colors of TV ?

A

Red, green, blue, cyan, yellow, magenta

B

Red, yellow, blue, cyan, yellow, magenta

C

Red, green, blue, cyan, white, magenta

D

Red, yellow, blue, cyan, white, magenta

Question 41

In Radio frequency spectrum Very Low Frequency (VLF) band ranges from

A

3 − 30 Hz

B

3 − 30 kHz

C

3 − 30 MHz

D

30 MHz − 3 GHz

Question 42

Which of the following mode of propagation is known as ionospheric propagation ?

A

Sky wave propagation

B

Ground wave propagation

C

Space wave propagation

D

Surface wave propagation

Question 43

Line of sight propagation is

A

Surface wave propagation

B

Sky wave propagation

C

Space wave propagation

D

Ground wave propagation

Question 44

Which characteristics changes in frequency modulation ?

A

Carrier wave frequency

B

Modulating wave frequency

C

Carrier wave amplitude

D

Carrier wave phase

Question 45

What is the band width of AM if carrier frequency is 500 kHz and modulating frequency is 10 kHz ?

A

5 kHz

B

10 kHz

C

20 kHz

D

100 kHz

Question 46

For 100% AM modulation calculate the power transmitted by carrier signal if total power is 3000 W ?

A

1000 W

B

2000 W

C

3000 W

D

5000 W

Question 47

Antenna gain is measured in

A

dB

B

Hz

C

Henry

D

Farad

Question 48

An Omnidirectional antenna is designed to provide ___________ radiation pattern.

A

0°

B

90°

C

180°

D

360°

Question 49

Which of the following antenna is used for radar antenna ?

A

Yagi uda antenna

B

Isotropic antenna

C

Patch antenna

D

Parabolic antenna

Question 50

According to Nyquist criteria of sampling theorem the sampling frequency is

A

Same as signal frequency

B

Twice the signal frequency

C

3 times of signal frequency

D

4 times of signal frequency

Question 51

Which of the following is not a digital modulation technique ?

A

ASK

B

FSK

C

PSK

D

FM

Question 52

DC component is present in ___________ type of encoding

A

Polar encoding

B

Unipolar encoding

C

Bipolar encoding

D

Manchester encoding

Question 53

The geographical area under one base station with a single transmitter and a receiver is known as

A

Cell

B

Cluster

C

Cell site

D

Module

Question 54

Which wireless technology link is used for mobile phone data transfer ?

A

SIM

B

Barcode

C

Bluetooth

D

Multiplexer

Question 55

The band width used for TV transmission in India is

A

2 MHz

B

5 MHz

C

7 MHz

D

10 MHz

Question 56

What are the 3 primary colours used in colour television system ?

A

Red, Blue, Green

B

Red, Blue, Yellow

C

Red, Blue, Magenta

D

Red, Green, Yellow

Question 57

Which of the following type of UPS is known as double conversion UPS?

A

OFF line UPS

B

ON line UPS

C

Line interactive UPS

D

Stand by UPS

Question 58

Which circuit is used in control section of SMPS to drive the switching transistor ?

A

Rectifier

B

Pulse width modulator

C

Filter

D

Multiplexer

Question 59

Which of the following is an example of e-governance project ?

A

Online tax filing and payment

B

Hospital bill payment

C

Construction of public park

D

Building a new highway

Question 60

According to which section, No person shall possess wireless telegraphy apparatus without license issued under Indian telegraph act ?

A

Section 3

B

Section 4

C

Section 5

D

Section 7

Question 61

What is the formula for dynamically induced emf ?

A

BLV volts

B

BL sinθ volts

C

BLV sinθ volts

D

BLV cosθ volts

Question 62

What is the purpose of ELCB ?

A

Detects the fault in circuit

B

Monitors the residual current

C

Protects the equipment from over load

D

Protects from short circuit fault

Question 63

What is the power factor in a 3 phase power measurement of two wattmeters showing equal reading ?

A

0

B

1

C

0.5

D

0.8

Question 64

Calculate the percentage slip in a 3 phase induction motor having 6 poles with a frequency of 50 Hertz rotating with actual speed of 960 rpm.

A

2%

B

3%

C

4%

D

5%

Question 65

In a 3 phase system, if the active power is 4 kW and the apparent power is 5 KVA, calculate the reactive power.

A

1 KVAR

B

2 KVAR

C

3 KVAR

D

4 KVAR

Question 66

Which type of DC Generator works in absence of residual magnetism ?

A

Shunt generator

B

Series generator

C

Compound generator

D

Separately excited generator

Question 67

Calculate the line current of the 3 phase 415 V 50 Hz supply for the balanced load of 3000 Watt at 0.8 power factor is connected in star.

A

8.5 A

B

5.2 A

C

4.5 A

D

3.4 A

Question 68

What is the rotor frequency of a 3 phase squirrel cage induction motor at the time of starting ?

A

Equal to supply frequency

B

3 times less than supply frequency

C

3 times more than supply frequency

D

√3 times less than supply frequency

Question 69

Which electrical quantity affects the heat generated in a conductor ?

A

Voltage

B

Square of the current

C

Square of the resistance

D

Current passed through it

Question 70

Calculate the voltage regulation in percentage of the transformer if the no load voltage is 240 volt and full load voltage is 220 volt.

A

7.2%

B

8.3%

C

8.71%

D

9.09%

Question 71

What is the maximum value of voltage for 240 volt RMS ?

A

240 V

B

415 V

C

339.5 V

D

376.8 V

Question 72

Which is the application of DC series MCB ?

A

AC motor

B

DC motor

C

Locomotives

D

Air conditioners

Question 73

What is the effect on surrounding metal placed in a magnetic field ?

A

Hysteresis

B

Skin effect

C

Eddy current

D

Dielectric stress

Question 74

What is the unit of luminous efficiency ?

A

Lux

B

Lumen

C

Lumen/m²

D

Lumen/watt

Question 75

What is the effect of the parallel circuit with one branch opened ?

A

Current will remain same

B

Whole circuit will not function

C

No current will flow in that branch

D

Voltage drop increase in the opened branch

Question 76

Which resistor the lowest current flows in a parallel circuit having the values of 50 Ω, 220 Ω, 450 Ω and 560 Ω connected with supply ?

A

50 Ω

B

220 Ω

C

450 Ω

D

560 Ω

Question 77

Which position MB type high pressure mercury vapour lamps are operated ?

A

Vertical

B

Inclined

C

Horizontal

D

Any position

Question 78

Which factor affects the polarity of the electromagnet ?

A

Length of the coil

B

Direction of current

C

Strength of current

D

Strength of the magnetic field

Question 79

Which power loss is assessed by open-circuit test on transformer ?

A

Hysteresis loss only

B

Eddy current loss only

C

Copper loss

D

Core loss

Question 80

Which type of resistor is used for Arc quenching protection in circuit breakers ?

A

Varistors

B

Sensistors

C

Thermistors

D

Light Dependent Resistor (LDR)

Question 81

Which of the following statements are true ?
i. First Generation computers used Valves.
ii. Second Generation computers used vacuum tubes.
iii. Third Generation computers used ICs.
iv. Fourth generation computers use microprocessors.

A

i only

B

i and ii only

C

i, ii and iii only

D

i, iii and iv only

Question 82

An Operating System do
i. Process Management
ii. Process Synchronization
iii. Memory Management
iv. CPU Scheduling

A

i, ii, iii and iv

B

ii and iv only

C

i, ii and iii only

D

i, ii and iv only

Question 83

Which is the technology of electronically extracting data from marked fields such as checkboxes or bubbles from pre-printed forms ?

A

OCR

B

MICR

C

OMR

D

BCR

Question 84

Linux was first released in

A

1993

B

1990

C

1992

D

1991

Question 85

In the following VDUs, which are considered as emissive display ?
i. LED
ii. LCD
iii. Flat CRT
iv. Plasma panel

A

ii only

B

i, ii and iii only

C

i, ii and iv only

D

i, iii and iv only

Question 86

With the number of cores increased, then
i. Price increases
ii. The multitasking capability of the CPU increases
iii. The speed increases
iv. Processing time increases

A

iv only

B

i, ii and iii only

C

i, ii and iv only

D

i, iii and iv only

Question 87

DHCP stands for

A

Dynamic Host Control Protocol

B

Dynamic Host Connection Protocol

C

Dynamic Host Configuration Protocol

D

Dynamic Hub Control Protocol

Question 88

In MS Word which of the following are types of SmartArt graphic ?
i. Cycle
ii. Hierarchy
iii. Process
iv. Stock

A

All of them

B

Except iv

C

Except iii

D

Except ii

Question 89

Which twisted pair cable contains only two pairs (4 wires) ?

A

Cat 1

B

Cat 2

C

Cat 3

D

Cat 4

Question 90

Which protocol specifies the way the web browser and the web server communicates ?

A

FTP

B

HTTP

C

SMTP

D

TCP

Question 91

According to ROM, which of the following statements are true ?
i. ROM is a Programmable Logic Device
ii. ROM stands for Read Only Memory
iii. ROM is the primary memory unit of a computer
iv. We can only read the programs and data stored on it

A

ii, iii, iv only

B

ii and iv only

C

i, ii and iii only

D

i, ii, iii and iv

Question 92

In MS Word, under Auto fit behaviour you can't choose

A

AutoFit Rows

B

AutoFit Contents

C

AutoFit Window

D

Fixed Column Width

Question 93

Bluetooth follows the principle of transmitting and receiving data using

A

Radio Waves

B

Micro Waves

C

Infrared Waves

D

Ultra Violet Waves

Question 94

Which of the following are intermediary devices ?
i. Wireless Access Points
ii. Web Servers
iii. Workstations
iv. Security Firewalls

A

iii only

B

ii and iii only

C

i, ii and iv only

D

ii, iii and iv only

Question 95

According to a DVD, which of the following are true ?
i. The recording or metal layer is situated on the top of the disk.
ii. There are double layers of pits in DVD.
iii. The data transfer rate is 11 MB/sec.
iv. The thickness of DVD is 0.6 mm.

A

i, ii and iii only

B

ii and iii only

C

i, ii and iv only

D

ii, iii and iv only

Question 96

Windows 10 introduced a feature, which is able to accept voice commands

A

File Explorer

B

Cortana

C

Disk Clean Up

D

Control panel

Question 97

Who created World Wide Web ?

A

Charles Babbage

B

Timothy John Berners Lee

C

Dennis Ritchie

D

Brenden Eich

Question 98

Which of the motherboard component controls the data connection to the BIOS ?

A

RAM

B

CPU

C

Northbridge

D

Southbridge

Question 99

In the following input devices, which are considered as pointing devices ?
i. Scanner
ii. Mouse
iii. Joystick
iv. Keyboard

A

ii only

B

ii and iii only

C

i and iv only

D

ii, iii and iv only

Question 100

On the basis of principle of operation computers are classified as
i. Micro Computers
ii. Analog Computers
iii. Digital Computers
iv. Hybrid Computers

A

i only

B

i and ii only

C

ii, iii and iv only

D

i, iii and iv only