Official Paper

JK Police Constable Official Paper (Held On: 08 Dec, 2024) - Telecommunication (Previous Year Paper)

100 questions · 120 minutes · with answers · free

Attempt as Timed Mock Test

Test (100 questions)

1

It was very kind of you to do the washing-up, but you—— it.

  1. ((a))

     didn't have to do

  2. ((b))

    hadn't to do

  3. ((c))

    mightn't have done

  4. ((d))

    mustn't have done

Show Answer
Answer: ((a))

 didn't have to do

2

Find out which part of a sentence has an error.

After knowing truth, (a)/ they took the right decision (b)/ in the matter. (c)/ No error (d)

  1. ((a))

    a

  2. ((b))

    b

  3. ((c))

    c

  4. ((d))

    d

Show Answer
Answer: ((a))

a

3

Out of the four alternatives, choose the one which can be substituted for the given words sentence.

Prohibited by law or treaty from being imported or exported

  1. ((a))

    contraband

  2. ((b))

    smuggled

  3. ((c))

    counterfeit

  4. ((d))

    forged

Show Answer
Answer: ((a))

contraband

4

In the following questions out of the four alternatives, choose the one which best expresses the meaning of the given word.

Inclement

  1. ((a))

    Selfish

  2. ((b))

    Active

  3. ((c))

    Unfavourable

  4. ((d))

    Inactive

Show Answer
Answer: ((a))

Selfish

5

In the following questions choose the word opposite in meaning to the given word.

Perspicuity

  1. ((a))

    Vagueness

  2. ((b))

     Dullness

  3. ((c))

     Unfairness

  4. ((d))

    Unwillingness

Show Answer
Answer: ((a))

Vagueness

6

Find out which part of a sentence has an error.

If you turn the corner, (a) / you will found a house (b) / built of stone. (c) /No Error (d)

  1. ((a))

    a

  2. ((b))

    b

  3. ((c))

    c

  4. ((d))

    d

Show Answer
Answer: ((a))

a

7

Fill in the blank.

Everyone in this world is accountable to God—— his actions.

  1. ((a))

    about

  2. ((b))

    for

  3. ((c))

    to

  4. ((d))

    over

Show Answer
Answer: ((a))

about

8

Out of the four alternatives, choose the one which can be substituted for the given words/sentence.

A person who shows off his learning

  1. ((a))

    pedant

  2. ((b))

    educationist

  3. ((c))

    exhibitor

  4. ((d))

    researcher

Show Answer
Answer: ((a))

pedant

9

Out of four words, one word is correctly spelt. Find the correctly spelt word.

  1. ((a))

    dysentery

  2. ((b))

    momentery

  3. ((c))

    cemetary

  4. ((d))

    comentary

Show Answer
Answer: ((a))

dysentery

10

Choose the alternative which best expresses the meaning of the Idiom/Phrase.

to smell a rat

  1. ((a))

     to smell foul

  2. ((b))

     to see a rat

  3. ((c))

    to chase a rat

  4. ((d))

     to be suspicious

Show Answer
Answer: ((a))

 to smell foul

11

Choose the alternative which best expresses the meaning of the Idiom/Phrase.

To let off steam, my friend started murmuring.

  1. ((a))

     to release his tension

  2. ((b))

    to show his anger

  3. ((c))

    to show his approval

  4. ((d))

    to show his displeasure

Show Answer
Answer: ((a))

 to release his tension

12

Identify the best way to improve the underlined part of the given  sentence.

She is a very good sprinter. I can't run as fast as she do.

  1. ((a))

    as she does

  2. ((b))

    as she doing

  3. ((c))

    like she is doing

  4. ((d))

    no improvement

Show Answer
Answer: ((a))

as she does

13

Select the word which means the same as the group of words given.

To express in an unclear way

  1. ((a))

    eloquent

  2. ((b))

    garbled

  3. ((c))

    lucid

  4. ((d))

    Intelligible

Show Answer
Answer: ((a))

eloquent

14

Select the most appropriate option to fill in the blank.

The sky is quite overcast. We're—— to have rain today.

  1. ((a))

    likely

  2. ((b))

    mostly

  3. ((c))

    surely

  4. ((d))

    certainly

Show Answer
Answer: ((a))

likely

15

Select the most appropriate meaning of the given idiom.

The trouble makers took to their heels when they saw the police coming.

  1. ((a))

    hid themselves

  2. ((b))

    ran away

  3. ((c))

     faced them boldly

  4. ((d))

    prepared to fight

Show Answer
Answer: ((a))

hid themselves

16

Which is the largest city in the Union Territory of Jammu and Kashmir?

  1. ((a))

    Jammu

  2. ((b))

    Srinagar

  3. ((c))

    Anantnag

  4. ((d))

    Leh

Show Answer
Answer: ((a))

Jammu

17

Which river is primarily allocated to Pakistan under the Indus Water Treaty?

  1. ((a))

    Indus

  2. ((b))

    Ravi

  3. ((c))

    Beas

  4. ((d))

    Sutlej

Show Answer
Answer: ((a))

Indus

18

Gulmarg hill station lies in

  1. ((a))

    Aravali Range

  2. ((b))

    Pir Panjal Range

  3. ((c))

    Langpangkong Range

  4. ((d))

    Changkikong Range

Show Answer
Answer: ((a))

Aravali Range

19

Which of the following is known as the 'Valley of Shepherds'?

  1. ((a))

    Pahalgam

  2. ((b))

    Gulmarg

  3. ((c))

    Sonamarg

  4. ((d))

    Betaab Valley

Show Answer
Answer: ((a))

Pahalgam

20

King Harsha belongs to which dynasty of Kashmir?

  1. ((a))

    Lohara

  2. ((b))

    Utpal

  3. ((c))

    Karkot

  4. ((d))

    Chandella

Show Answer
Answer: ((a))

Lohara

21

Which of the peak given in the choices is NOT one among the top 5 mountain peaks in India?

  1. ((a))

    Trisul

  2. ((b))

    Kangchenjunga

  3. ((c))

    Kamet

  4. ((d))

    Nanda Devi

Show Answer
Answer: ((a))

Trisul

22

The book titled "Memories Never Die" was published as a tribute to whom?

  1. ((a))

    Abdul Kalam

  2. ((b))

    Atal Bihari Vajpayee

  3. ((c))

     Pranab Mukherjee

  4. ((d))

    Manohar Parrikar

Show Answer
Answer: ((a))

Abdul Kalam

23

were associated with:

  1. Avani Lekhara                             i. High Jump
  2. Praveen Kumar                           ii. Archery
  3. Nitesh Kumar                              iii. Shooting
  4. Harvinder Singh                          iv. Badminton
<br>

Choose the correct option:

  1. ((a))

    1 - iii, 2 - i, 3 - iv, 4 - ii

  2. ((b))

     1 - i, 2 - iii, 3 - iv, 4 - ii

  3. ((c))

    1 - iii, 2 - i, 3 - ii, 4 - iv

  4. ((d))

    1 - i, 2 - iii, 3 - ii, 4 - iv

Show Answer
Answer: ((a))

1 - iii, 2 - i, 3 - iv, 4 - ii

24

In which year was English announced as the official language of the Government throughout India?

  1. ((a))

    1815

  2. ((b))

    1825

  3. ((c))

    1835

  4. ((d))

     1845

Show Answer
Answer: ((a))

1815

25

Who among the given options, had been conferred with the three Padma Awards and the Bharat Ratna Award as well?

  1. ((a))

    Sachin Tendulkar

  2. ((b))

    Bismillah Khan

  3. ((c))

    Amartya Kumar Sen

  4. ((d))

    L.K. Advani

Show Answer
Answer: ((a))

Sachin Tendulkar

26

Match the following Countries to its currency.

  1. Russia                     i. Peso
  2. Chile                       ii. Kyat
  3. Georgia                  iii. Ruble
  4. Myanmar                iv. Lari
<br>

Which of the pairs given above is/are correctly matched?

  1. ((a))

    1 - iii, 2 - i, 3 - iv, 4 - ii

  2. ((b))

    1 - iii, 2 - i, 3 - ii, 4 - iv

  3. ((c))

    1 - i, 2 - iii, 3 - iv, 4 - ii

  4. ((d))

    1 - i, 2 - iii, 3 - ii, 4 - iv

Show Answer
Answer: ((a))

1 - iii, 2 - i, 3 - iv, 4 - ii

27

The concept of the concurrent list in the Indian Constitution was adopted from the——

  1. ((a))

    British Constitution

  2. ((b))

    Canadian Constitution

  3. ((c))

    Australian Constitution

  4. ((d))

    Irish Constitution

Show Answer
Answer: ((a))

British Constitution

28

Match the following Dams to the rivers on which it is situated:

   Dam                                                    River

  1. Sardar Sarovar                         i. Mahanadi
  2. Hirakud                                     ii. Periyar
  3. Bhakra Nangal                         iii. Narmada
  4. Idukki                                        iv. Sutlej
<br>

Which of the pairs given above is/are correctly matched?

  1. ((a))

    1-iii, 2-i, 3-iv, 4-ii

  2. ((b))

    1-iii, 2-i, 3-ii, 4-iv

  3. ((c))

    1-i, 2-iii, 3-ii, 4-iv

  4. ((d))

     1-i, 2-iii, 3-iv, 4-ii

Show Answer
Answer: ((a))

1-iii, 2-i, 3-iv, 4-ii

29

Of the following, which is India's highest dam?

  1. ((a))

    Bhakra Nangal Dam

  2. ((b))

    Tehri Dam

  3. ((c))

    Nagarjuna Sagar Dam

  4. ((d))

    Nurek Dam

Show Answer
Answer: ((a))

Bhakra Nangal Dam

30
  1. Match the following International organization to its Headquarters.
  2. INTERPOL                                 i. Lyon, France
  3. WWF                                          ii. Montreal, Canada
  4. EU                                              iii. Vaud, Switzerland
  5. ICAO                                          iv. Brussels, Belgium
<br>

Match the above pairs appropriately.

  1. ((a))

     1-iii, 2-i, 3-iv, 4-ii

  2. ((b))

    1-i, 2-iii, 3-iv, 4-ii

  3. ((c))

    1-i, 2-iii, 3-ii, 4-iv

  4. ((d))

    1-iii, 2-i, 3-ii, 4-iv

Show Answer
Answer: ((a))

 1-iii, 2-i, 3-iv, 4-ii

31

SAARC Arbitration Council (SARCO) is situated in——.

  1. ((a))

    India

  2. ((b))

    Pakistan

  3. ((c))

    Bhutan

  4. ((d))

    Bangladesh

Show Answer
Answer: ((a))

India

32

Match the 2024 Nobel Prize Award winners to their field:

  1. John Hopfield                               i. Chemistry
  2. David Baker                                 ii. Medicine
  3. Gary Ruvkun                               iii. Physics
  4. Han Kang                                    iv. Literature

Choose the correct option.

  1. ((a))

    1-iii, 2-i, 3-iv, 4-ii

  2. ((b))

     1-i, 2-iii, 3-iv, 4-ii

  3. ((c))

    1 - i, 2 - iii, 3 - ii, 4 - iv

  4. ((d))

    1-iii, 2-i, 3-ii, 4-iv

Show Answer
Answer: ((a))

1-iii, 2-i, 3-iv, 4-ii

33

Match the International newspaper to its base country:

  1. The Guardian                i. China         
  2. The People's Daily        ii. Russia
  3. El Pais                          iii. United Kingdom 
  4. Kommersant                 iv. Spain  

Choose the correct option.

  1. ((a))

    1-iii, 2-i, 3-iv, 4-ii

  2. ((b))

    1-i, 2-iii, 3-iv, 4-ii

  3. ((c))

    1 - i, 2 - iii, 3 - ii, 4 - iv

  4. ((d))

    1-iii, 2-i, 3-ii, 4-iv

Show Answer
Answer: ((a))

1-iii, 2-i, 3-iv, 4-ii

34

 In which year, Indus Water Treaty was signed?

  1. ((a))

     1950

  2. ((b))

    1955

  3. ((c))

    1960

  4. ((d))

    1965

Show Answer
Answer: ((a))

 1950

35

What was the mascot for the Khelo India Winter Games, 2024?

  1. ((a))

    Snow Leopard

  2. ((b))

    Musk Deer

  3. ((c))

    Red Fox

  4. ((d))

    Golden Eagle

Show Answer
Answer: ((a))

Snow Leopard

36

If the price of the commodity is increased by 50% by what fraction must its consumption be reduced so as to keep the same expenditure on its consumption?

  1. ((a))

     1/4

  2. ((b))

    1/3

  3. ((c))

    1/2

  4. ((d))

    2/3

Show Answer
Answer: ((a))

 1/4

37

The average weight of a group of seven boys is 56 kg. The individual weights (in kg) six of them are 52, 57, 55, 60, 59 and 55. Find the weight of the seventh boy.

  1. ((a))

    45 Kg

  2. ((b))

    54 Kg

  3. ((c))

    49 Kg

  4. ((d))

    58 Kg

Show Answer
Answer: ((a))

45 Kg

38

The number of students in 3 classes is in the ratio of 2: 3: 4. If 12 students are increased in each class this ratio changes to 8: 11:14. The total number of students in the three classes in the beginning was

  1. ((a))

    162

  2. ((b))

    108

  3. ((c))

    95

  4. ((d))

    54

Show Answer
Answer: ((a))

162

39

A man riding a bicycle covers a distance of 60 km in the direction of the wind and returns back in 8 hours. If speed of the wind is 10 km/hour, find the speed of the bicycle.

  1. ((a))

    25 km/hour

  2. ((b))

    20.5 km/hour

  3. ((c))

    20 km/hour

  4. ((d))

    30 km/hour

Show Answer
Answer: ((a))

25 km/hour

40

(0.08 × 0.007) is equal to

  1. ((a))

    0.056

  2. ((b))

    0.0056

  3. ((c))

    0.00056

  4. ((d))

    0.56

Show Answer
Answer: ((a))

0.056

41

Determine the number of months required to get Rs. 25.5 as simple interest on Rs. 850 at 3.6% per annum.

  1. ((a))

    10 months

  2. ((b))

    9 months

  3. ((c))

     8 months

  4. ((d))

    7 months

Show Answer
Answer: ((a))

10 months

42

Find the missing number in the following series:

10, 100, 200, 310, ?

  1. ((a))

    430

  2. ((b))

    420

  3. ((c))

     410

  4. ((d))

    440

Show Answer
Answer: ((a))

430

43

Find the missing letters in the following sequence in the correct order

abca — bcaab — ca — bbc –

  1. ((a))

    ccaa

  2. ((b))

    abac

  3. ((c))

    abba

  4. ((d))

    bbaa

Show Answer
Answer: ((a))

ccaa

44

If in a certain language PROSE is coded as PPOQE, how is LIGHT coded in that code?

  1. ((a))

    LIGFT

  2. ((b))

    LGGHT

  3. ((c))

    LGGFT

  4. ((d))

    LLGFE

Show Answer
Answer: ((a))

LIGFT

45

Introducing a woman, a man said, "Her husband is the only son of my father". How is that woman related to the man?

  1. ((a))

    Husband

  2. ((b))

    Sister

  3. ((c))

    Wife

  4. ((d))

    Mother

Show Answer
Answer: ((a))

Husband

46

Find the odd one out from the given set of numbers.

14, 28, 35, 46, 56, 84

  1. ((a))

    56

  2. ((b))

    84

  3. ((c))

    35

  4. ((d))

    46

Show Answer
Answer: ((a))

56

47

Which group of letters is different from others?

  1. ((a))

    CBAED

  2. ((b))

    IJHGK

  3. ((c))

    SRQPT

  4. ((d))

    TVWYZ

Show Answer
Answer: ((a))

CBAED

48

For the Assertion (A) and Reason (R) below, choose the correct alternative

Assertion (A): Simla is colder than Delhi.

Reason (R): Simla is at a higher altitude as compared to Delhi.

  1. ((a))

    Both A and R are true and R is the correct explanation of A.

  2. ((b))

    Both A and R are true but R is NOT the correct explanation of A.

  3. ((c))

    A is true but R is false.

  4. ((d))

    A is false but R is true.

Show Answer
Answer: ((a))

Both A and R are true and R is the correct explanation of A.

49

The modulator stage in a radio transmitter is normally

  1. ((a))

    Class-C Amplifier

  2. ((b))

    Class-B push-pull Amplifier

  3. ((c))

    Class-A Amplifier

  4. ((d))

    Class-D Amplifier

Show Answer
Answer: ((a))

Class-C Amplifier

50

In television, 4: 3 represents the

  1. ((a))

     Interlace Ratio

  2. ((b))

     Maximum Horizontal Deflection

  3. ((c))

    Aspect Ratio

  4. ((d))

    Ratio of the two diagonals

Show Answer
Answer: ((a))

 Interlace Ratio

51

In T. V., the picture signal is

  1. ((a))

    Amplitude modulated and at the low-frequency end of each channel allocation

  2. ((b))

    Frequency modulated and at the low-frequency end of each channel allocation

  3. ((c))

    Amplitude modulated and at the high frequency end of each channel allocation

  4. ((d))

    None of above

Show Answer
Answer: ((a))

Amplitude modulated and at the low-frequency end of each channel allocation

52

A PAM signal can be demodulated using

  1. ((a))

    A High pass filter

  2. ((b))

    A Band pass filter

  3. ((c))

     A Low pass filter

  4. ((d))

    None of the above

Show Answer
Answer: ((a))

A High pass filter

53

In time-division-multiplexing, each multiplexed signal occupies;

  1. ((a))

    A Fraction of the Transmission Bandwidth

  2. ((b))

    The Entire Transmission Bandwidth

  3. ((c))

    A Bandwidth Equal to the Bandwidth of each input signal

  4. ((d))

    None of the above

Show Answer
Answer: ((a))

A Fraction of the Transmission Bandwidth

54

What will be the upper sideband and lower sideband frequencies for amplitude modulation of a 5-kHz signal with 40-KHz carrier frequency?

  1. ((a))

    42.5 kHz and 37.5 kHz, respectively

  2. ((b))

    45 kHz and 35 kHz, respectively

  3. ((c))

    50 kHz and 30 kHz, respectively

  4. ((d))

    25 kHz and 15 kHz, respectively

Show Answer
Answer: ((a))

42.5 kHz and 37.5 kHz, respectively

55

In FM to AM conversion, the input of the frequency-modulated signal converted into amplitude modulated signal by———

  1. ((a))

    Differentiator

  2. ((b))

    Integrator

  3. ((c))

    Comparator

  4. ((d))

    None of the above

Show Answer
Answer: ((a))

Differentiator

56

Pulse amplitude modulation is a process whereby;

  1. ((a))

    The position of the pulse is changed as a function of the sampled value

  2. ((b))

    The width of the pulse is varied as a function of time

  3. ((c))

    The height of a pulse is made proportional to the sampled value

  4. ((d))

    None of the above

Show Answer
Answer: ((a))

The position of the pulse is changed as a function of the sampled value

57

The amplitude modulation signal without a carrier is known as——

  1. ((a))

    SSB-SC

  2. ((b))

    DSB-SC

  3. ((c))

    Both A and B

  4. ((d))

    None of the above

Show Answer
Answer: ((a))

SSB-SC

58

Choose the incorrect statement

  1. ((a))

    SMPS is less sensitive to input voltage variations

  2. ((b))

    SMPS is smaller as compared to rectifiers

  3. ((c))

    SMPS has low input ripple

  4. ((d))

    SMPS is a source of radio interference

Show Answer
Answer: ((a))

SMPS is less sensitive to input voltage variations

59

The magnetic field produced in the stator of a three phase induction motor travels at

  1. ((a))

    Rotating speed

  2. ((b))

    Synchronous speed

  3. ((c))

    Asynchronous speed

  4. ((d))

    Slip speed

Show Answer
Answer: ((a))

Rotating speed

60

Alternating Current (AC) cannot be measured by DC ammeter because:

  1. ((a))

    Alternating current cannot pass through the DC ammeter

  2. ((b))

    Average value of complete cycle is zero

  3. ((c))

    Alternating current changes its direction

  4. ((d))

    None of the above

Show Answer
Answer: ((a))

Alternating current cannot pass through the DC ammeter

61

What is a common use of a Band Pass Filter in Radio Wave Propagation?

  1. ((a))

     It allows only a specific range of frequencies to pass through

  2. ((b))

    It allows all frequencies to pass through

  3. ((c))

    It blocks all frequencies from passing through

  4. ((d))

     It amplifies all frequencies equally

Show Answer
Answer: ((a))

 It allows only a specific range of frequencies to pass through

62

Classify the angle as acute, right, obtuse, straight:

<br>

Match I with II.

  1. ((a))

    a-ii, b-iv, c-i, d-iii

  2. ((b))

     a-ii, b-iv, c-iii, d-i

  3. ((c))

    a-ii, b-i, c-iv, d-iii

  4. ((d))

    a-ii, b-i, c-iii, d-iv

Show Answer
Answer: ((a))

a-ii, b-iv, c-i, d-iii

63

Two statements are followed by four conclusions numbered in I, II, III, IV. You have to take the given statements to be true if they seem to be at variance from the commonly known facts and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts:

Statements

  1. All stars are planets.
  2. All planets are trees.

Conclusions

I. All planets are stars

II. All stars are trees

III. All trees are planets

IV. Some trees are stars

Which of the conclusions follows logically?

  1. ((a))

    Only II and IV follow

  2. ((b))

    Only I and II follow

  3. ((c))

    All follow

  4. ((d))

    Only III and IV follow

Show Answer
Answer: ((a))

Only II and IV follow

64

Match List I with List II and select the correct answer using the codes given below the list

List - IList - II
i. Monitor1. Displays the information in the visual form
ii. CPU2. Processor for controlling and executing instructions
iii. Information3. Processed data useful for the user
  1. ((a))

     i - 1 ii - 2 ii - 3

  2. ((b))

     i - 3 ii - 2 iii-1

  3. ((c))

     i - 3 ii - 1 ii - 2

  4. ((d))

     i - 1 ii-3, ii - 2

Show Answer
Answer: ((a))

 i - 1 ii - 2 ii - 3

65

Which one of the following is not a type of magnetic storage system?

  1. ((a))

     Magnetic tape

  2. ((b))

    Compact disk

  3. ((c))

    Hard disk

  4. ((d))

    Floppy disk

Show Answer
Answer: ((a))

 Magnetic tape

66

Which of the following device is not a media input device to computer?

  1. ((a))

    Microphone

  2. ((b))

    Webcam

  3. ((c))

    Digital Camera

  4. ((d))

    None of the above

Show Answer
Answer: ((a))

Microphone

67

The functions of operating systems are

i. Process management

ii. Memory management

iii. File management

iv. Device management

Choose the correct Answer

  1. ((a))

     i, ii, iii

  2. ((b))

    i, iii, iv

  3. ((c))

    i, ii, iv

  4. ((d))

    i, ii, iii, iv

Show Answer
Answer: ((a))

 i, ii, iii

68

Which of the following is not an output device?

  1. ((a))

    Scanner

  2. ((b))

    Plotter

  3. ((c))

    Printer

  4. ((d))

    Projector

Show Answer
Answer: ((a))

Scanner

69

Which of the following is a spreadsheet application program?

  1. ((a))

    MS Access

  2. ((b))

    MS Word

  3. ((c))

    MS Excel

  4. ((d))

    MS-DOS

Show Answer
Answer: ((a))

MS Access

70

Match List-I with List-II and Select the correct answer using the codes given below the list

List - IList - II
i. Operating System1. Scanning Devices
ii. Input Device2. Security Management
iii. Output Device3. Projector
  1. ((a))

    i - 2 ii - 1 iii-3

  2. ((b))

    i - 2 , ii - 3 iii-1

  3. ((c))

     ii - 1 ii - 3 i - 2

  4. ((d))

    i - 1 , ii - 3 ii - 2

Show Answer
Answer: ((a))

i - 2 ii - 1 iii-3

71

Which one of the following is typed in the Run dialog box to access MS Word?

  1. ((a))

     Winword

  2. ((b))

    Word

  3. ((c))

    Msword

  4. ((d))

    Wordprogram

Show Answer
Answer: ((a))

 Winword

72

———is the widely used service of the——— through which users can send

and receive messages in an efficient way. Choose the correct answer to fill in the blanks.

  1. ((a))

    Storage device, computer

  2. ((b))

    Input device, super computer

  3. ((c))

    E-mail, Internet

  4. ((d))

    None of the above

Show Answer
Answer: ((a))

Storage device, computer

73

What are the options available in-home page of google.com search engine in computer (Mozilla Firebox)?

I. Google Search

II. I'm Feeling Lucky

III. Search Text Box

Choose the correct answer.

  1. ((a))

    I, II

  2. ((b))

     II, III

  3. ((c))

    I, III

  4. ((d))

    I, II, III

Show Answer
Answer: ((a))

I, II

74

If the wiring in a building as a 2.4 kW load, what will be the permissible insulation resistance to earth for a 240 V system of supply?

  1. ((a))

    0.08 ΜΩ

  2. ((b))

    0.05 ΜΩ

  3. ((c))

    0.02 ΜΩ

  4. ((d))

    0.12 ΜΩ

Show Answer
Answer: ((a))

0.08 ΜΩ

75

A 3-Phase 440 V, 50 Hz induction motor has 5% slip. The frequency of induced rotor emf will be

  1. ((a))

    50 Hz

  2. ((b))

    2.5 Hz

  3. ((c))

    5 Hz

  4. ((d))

    2 Hz

Show Answer
Answer: ((a))

50 Hz

76

The permanent wiring systems most preferably used for residential and commercial applications.

I. CTS

II. TRS

III. Cleat

IV. Conduit

Choose the correct answer.

  1. ((a))

    I, III

  2. ((b))

     II, III

  3. ((c))

    I, II and IV

  4. ((d))

     III

Show Answer
Answer: ((a))

I, III

77

The minimum clearance of the High Voltage (HV) line from the ground across the road should be.

  1. ((a))

    6.1 m

  2. ((b))

    5.1 m

  3. ((c))

    3.1 m

  4. ((d))

    8.1 m

Show Answer
Answer: ((a))

6.1 m

78

If the supply voltage of a 3 - phase induction motor is increased two times, then, torque is

  1. ((a))

    Increased twice

  2. ((b))

    Increased 4 times

  3. ((c))

    Decreased 4 Times

  4. ((d))

    Remain the same

Show Answer
Answer: ((a))

Increased twice

79

At start, the following information is correct for induction motor.

I. Speed = 0

II. Slip=0.5

III. Slip=1

IV. Slip=0

Choose the correct answer.

  1. ((a))

     I, IV

  2. ((b))

     IV

  3. ((c))

     I and III

  4. ((d))

     I, II

Show Answer
Answer: ((a))

 I, IV

80

Match the term in column-1 with its closest meaning in column-2.

Column-1Column-2
i. Lenz's law1. Application of electromagnetic induction
ii. Electric generator2. Polarity of induced voltage
iii. High permeability3. Inversely proportional to permeability
iv. Reluctance4. Easily magnetized
<br>

Choose the correct option.

  1. ((a))

    i-2, ii-1, iii-4, iv-3

  2. ((b))

    i-4, ii-2, iii-3, iv-1

  3. ((c))

    i-1, ii-2, iii-3, iv-4

  4. ((d))

    i-3, ii-2, iii-4, iv-1

Show Answer
Answer: ((a))

i-2, ii-1, iii-4, iv-3

81

What is the transmission frequency range of FM radio?

  1. ((a))

    28-58 MHz

  2. ((b))

    88-108 MHz

  3. ((c))

    58-88 MHz

  4. ((d))

    108-128 MHz

Show Answer
Answer: ((a))

28-58 MHz

82

Consider the following statements:

Statement (I): In AM systems the modulation index (0 < m < I) should be high.

Statement (II): The higher the value of m, the greater the power in the sidebands.

Choose the correct option.

  1. ((a))

    A) Both Statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I).

  2. ((b))

    B) Both Statement (I) and Statement (II) are individually true but Statement (II) is not the correct explanation of Statement (I).

  3. ((c))

    C) Statement (I) is true but Statement (II) is false.

  4. ((d))

    D) Statement (I) is false but Statement (II) is true.

Show Answer
Answer: ((a))

A) Both Statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I).

83

The correct sequence of subsystems in an FM receiver is:

  1. ((a))

    A) Mixer RF amplifier limiter → IF amplifier → discriminator → audio amplifier

  2. ((b))

    B) RF amplifier → mixer limiter → discriminator → IF amplifier → audio amplifier

  3. ((c))

    C) RF amplifier mixer → IF amplifier → limiter→discriminator audio amplifier

  4. ((d))

    D) Mixer → IF amplifier → limiter→ audio amplifier → discriminator

Show Answer
Answer: ((a))

A) Mixer RF amplifier limiter → IF amplifier → discriminator → audio amplifier

84

Which of the following is NOT a method for generating FM?

  1. ((a))

    By reactance modulator

  2. ((b))

    By varactor diode

  3. ((c))

    By switching modulator

  4. ((d))

    By Armstrong modulator

Show Answer
Answer: ((a))

By reactance modulator

85

The ionosphere acts as the reflecting surface for the waves in which of the following modes of propagation?

  1. ((a))

    Ground wave

  2. ((b))

    Space wave

  3. ((c))

    Sky wave

  4. ((d))

    LOS

Show Answer
Answer: ((a))

Ground wave

86

RF carrier 15 kV at 1 MHz is amplitude modulated and modulation index is 0.8. Find the peak voltage of the signal.

  1. ((a))

    18 kV

  2. ((b))

    12 kV

  3. ((c))

    18.75 kV

  4. ((d))

    22 kV

Show Answer
Answer: ((a))

18 kV

87

One of the main functions of the RF amplifier in a superheterodyne receiver is to:

  1. ((a))

    Permit better adjacent channel rejection

  2. ((b))

     Provide improved tracking

  3. ((c))

     Increase the tuning range of the receiver

  4. ((d))

     Improve the rejection of the image frequency

Show Answer
Answer: ((a))

Permit better adjacent channel rejection

88

Which of the following statements about the matched filter in a communication receiver are correct?

I. It produces ISI.

II. It maximizes the SNR at the detection instant.

Its impulse response depends on the signal shape.

IV. It may produce signal dispersion.

Select the correct answer from the codes given below:

  1. ((a))

    II and III only

  2. ((b))

     III and IV only

  3. ((c))

     I, II and IV only

  4. ((d))

    II, III and IV only

Show Answer
Answer: ((a))

II and III only

89

Match List-X (Modulation/Reception Techniques) with List-Y (Disadvantages) and select the correct answer using the codes given below the lists:

List-XList-Y
i. Superheterodyne1. Threshold effect
ii. FM2. Granular noise
iii. PCM3. Image frequency interference
iv. Delta modulation4. Quantization noise
<br>

Codes:

i          ii             iii            iv

  1. ((a))

    1, 3, 4, 2

  2. ((b))

    3, 1, 4, 2

  3. ((c))

    1, 3, 2, 4

  4. ((d))

    3, 1, 2, 4

Show Answer
Answer: ((a))

1, 3, 4, 2

90

Match List-X (Frequencies) with List-Y (Range) and select the correct answer using the codes given below the lists:

List-XList-Y
i. Audio Frequency (AF)1. 3 kHz to 300 GHz
ii. Intermediate Frequency (IF)2. 20 Hz to 20 kHz
iii. Radio Frequency (RF)3. 10 MHz to 108 MHz
<br>

Codes:

   i        ii        iii

  1. ((a))

    2, 1, 3

  2. ((b))

    3, 1, 2

  3. ((c))

    2, 3, 1

  4. ((d))

    3, 2, 1

Show Answer
Answer: ((a))

2, 1, 3

91

In TV transmission, the picture signal is amplitude-modulated and the sound signal is frequency-modulated. This is done because

  1. ((a))

    A) it is not possible to frequency modulate the picture signal.

  2. ((b))

    B) bandwidth requirement is minimized

  3. ((c))

    C) Sound signal is more susceptible to noise than a picture signal.

  4. ((d))

    D) synchronization of picture frames becomes easier.

Show Answer
Answer: ((a))

A) it is not possible to frequency modulate the picture signal.

92

The colour TV picture signal is a

  1. ((a))

    A) single-channel, one - dimensional signal

  2. ((b))

    B) three-channel, three - dimensional signal

  3. ((c))

    C) three-channel, one - dimensional signal

  4. ((d))

    D) single-channel, three - dimensional signal

Show Answer
Answer: ((a))

A) single-channel, one - dimensional signal

93

Which of the following statements is correct regarding induction motor?

  1. ((a))

    A) The power factor of a 1-phase induction motor is high, while the power factor of a 3-phase induction motor is low

  2. ((b))

    B) 1-phase induction motors produce low starting torque, whereas 3-phase induction motors produce high starting torque

  3. ((c))

    C) The efficiency of a 1-phase induction motor is more as compared to a 3-phase induction motor

  4. ((d))

    D) All options A, B and C are correct

Show Answer
Answer: ((a))

A) The power factor of a 1-phase induction motor is high, while the power factor of a 3-phase induction motor is low

94

For a dipole antenna

  1. ((a))

    A) the current distribution along its length is uniform irrespective of its length

  2. ((b))

    B) the effective length equals thrice of its physical length

  3. ((c))

    C) the radiation intensity is maximum along the normal to the dipole axis

  4. ((d))

    D) the input impedance is independent of the location of the feed point

Show Answer
Answer: ((a))

A) the current distribution along its length is uniform irrespective of its length

95

Match List-X (Medium type) with List-Y (Frequency range) and select the correct answer using the codes given below the lists:

List-XList-Y
i. Open wire1. 100 KHz
ii. Twisted pair2. 100 MHz
iii. Coaxial cable3. 5 KHz

Codes:

i            ii           iii

  1. ((a))

    3, 2, 1

  2. ((b))

    3, 1, 2

  3. ((c))

    2, 3, 1

  4. ((d))

    2, 1, 3

Show Answer
Answer: ((a))

3, 2, 1

96

Fill in the blank. "The generation of single sideband suppressed carrier (SSB-SC) signal is done by———— discrimination methods."

  1. ((a))

    Phase

  2. ((b))

     Frequency

  3. ((c))

    Both A and B

  4. ((d))

    None of the above

Show Answer
Answer: ((a))

Phase

97

Which of the following best describes interlaced scanning in a picture tube?

  1. ((a))

    Scanning lines progressively from top to bottom in one pass

  2. ((b))

    Scanning odd lines first and then even lines in two passes

  3. ((c))

    Scanning all lines simultaneously in a single pass

  4. ((d))

    Scanning half of the lines in the first pass and the other half in the second pass

Show Answer
Answer: ((a))

Scanning lines progressively from top to bottom in one pass

98

Match the following terms with their correct descriptions and select the correct answer using the codes given below the lists.

List-XList-Y
i. Progressive scanning1. Transmits only one sideband of the signal
ii. SSB2. Scans each line in sequence
iii. UHF3. Frequency ranges from 300 MHz to 3 GHz
iv. Negative picture pulses4. Pulses represent darker areas with higher voltage
<br>

Codes:

i        ii            iii           IV

  1. ((a))

    1,  2,  3,  4

  2. ((b))

    4,  1,  3,  2

  3. ((c))

    2,  1,   3,  2

  4. ((d))

    2,  4,  3,  1

Show Answer
Answer: ((a))

1,  2,  3,  4

99

Which of the following is true about a composite video signal?

  1. ((a))

    It includes audio, colour, and sync information in one signal

  2. ((b))

     It contains only the video component with no sync or color information

  3. ((c))

     It uses only one sideband in the transmission

  4. ((d))

    It is used exclusively in SHF channels

Show Answer
Answer: ((a))

It includes audio, colour, and sync information in one signal

100

Match the following terms with their correct descriptions and select the correct answer using the codes given below the lists.

List-XList-Y
i. VHF1. Commonly used for FM radio and TV channels
ii. UHF2. Used in cellular networks and TV broadcasting
iii. HF3. Mainly used in amateur and shortwave radio
iv. SHF4. Often used in satellite communications

Codes:

i       ii      iii      IV

  1. ((a))

    1,  3,  2,  4

  2. ((b))

    3,  4,  1,  2

  3. ((c))

    4,  3,  2,  1

  4. ((d))

    1,  2,  3,  4

Show Answer
Answer: ((a))

1,  3,  2,  4

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