SPSC 2013Recruitment TestQuestion Paper

SPSC 2013 Planning Officer (Energy Section) BPS-17, P&D Department (2013) — Telecommunication Engineering, Paper Type C Paper

The official SPSC CCE 2013 Planning Officer (Energy Section) BPS-17, P&D Department (2013) — Telecommunication Engineering, Paper Type C question paper (recruitment test), set by the Sindh Public Service Commission. Every MCQ is typed out below with its correct answer marked.

#SPSC 2013
#SPSC Planning Officer (Energy Section) BPS-17, P&D Department (2013) — Telecommunication Engineering, Paper Type C past papers
#SPSC 2013 Planning Officer (Energy Section) BPS-17, P&D Department (2013) — Telecommunication Engineering, Paper Type C paper
#Planning Officer (Energy Section) BPS-17, P&D Department (2013) — Telecommunication Engineering, Paper Type C
#SPSC Recruitment Test
#SPSC
#SPSC Planning Officer past paper
#SPSC Planning Officer 2013
#Planning Officer past papers
#Planning Officer test preparation
#Planning Officer BPS-17
#SPSC BPS-17 test
#SPSC P&D Department
#P&D Department jobs test
#SPSC Telecommunication Engineering, Paper Type C
#Planning Officer Telecommunication Engineering, Paper Type C paper
#Telecommunication Engineering, Paper Type C past paper
#SPSC Planning Officer Paper Type C
#Planning Officer MCQs with answers
#SPSC Planning Officer solved MCQs
#SPSC MCQs with answers
#SPSC solved past papers
#SPSC pre-interview written test
#SPSC Recruitment Test past papers
#SPSC 2013 past papers
#SPSC past papers
#Sindh Public Service Commission past papers
#SPSC test preparation
#CSS Nexus

SPSC 2013 Planning Officer (Energy Section) BPS-17, P&D Department (2013) — Telecommunication Engineering, Paper Type C paper — full text

Every MCQ from the paper, with the correct answer marked in green.

Planning Officer (Energy Section) BPS-17, P&D Department (2013) — Telecommunication Engineering, Paper Type C. Pre-interview written test · Tuesday 24 December 2013, 10:00 am to 11:00 am · Maximum marks 100. 50 MCQs; each incorrect answer deducts half mark.

1The output of a diode detector does not contain
- A)output signal
- B)modulation signal
- C)both (a) and (b)
- D)none of the above
Explanation: As usually keyed.
2Which signal will become zero when the feedback signal and reference signals are equal?
- A)Input signal
- B)Actuating signal
- C)both (a) and (b)
- D)none of the above
3In radar system, in type B indicator, the cathode ray beam is modulated in intensity to indicate
- A)the position
- B)the target
- C)the enemy
- D)None of these
4In the condition of low distortion, we completely neglect
- A)C (capacitance)
- B)V (potential difference)
- C)R (the resistance per unit length of the line)
- D)none of the above
5The voltage gain of an amplifier is 100 and current gain is 2. The power gain of the amplifier will be
- A)100
- B)200
- C)350
- D)450
6Which of the following signal is not transmitted in colour TV?
- A)Q
- B)J
- C)R
- D)None of the above
Explanation: Colour TV transmits the luminance Y and the I and Q (or U, V) colour-difference signals, not R, G, B. ("J" is probably a misprint for I.)
7For a d.c. power supply, diode can be used as a detector and a
- A)emitter
- B)rectifier
- C)either (a) or (b)
- D)none of these
8For a d.c. power supply, diode can be used as a detector and a
- A)emitter
- B)rectifier
- C)either (a) or (b)
- D)none of these
Explanation: Repeats Q7.
9The type 1 system can have a constant output velocity at steady state only when
- A)there is a fluctuating state error
- B)there is a variable steady state error
- C)there is a constant steady state error
- D)none of the above
10For satellite tracking at VHF, helical antenna is often used because of
- A)Faraday effect
- B)Laplace effect
- C)Super reaction
- D)none of the above
Explanation: Its circular polarization is unaffected by Faraday rotation in the ionosphere.
11Losses due to induction and radiation in coaxial line are reduced to
- A)minimum
- B)maximum
- C)constant
- D)none of the above
12The intelligence in the form of RF power is available at the
- A)transmitter
- B)transmitter output
- C)both (a) and (b)
- D)none of the above
13The gain of a current element is
- A)1.76 dB
- B)2052 dB
- C)3058 dB
- D)7.25 dB
Explanation: A Hertzian dipole has directivity 1.5 = 1.76 dB.
14Which of the following is multiband HF receiving antenna?
- A)the folded dipole
- B)Log-periodic
- C)Square loop
- D)None of these
15A full wave bridge rectifier is supplied voltage at 50 Hz. The lowest ripple frequency will be
- A)100 Hz
- B)95 Hz
- C)75 Hz
- D)225 Hz
16A full wave bridge rectifier is supplied voltage at 50 Hz. The lowest ripple frequency will be
- A)100 Hz
- B)95 Hz
- C)75 Hz
- D)225 Hz
Explanation: Repeats Q15.
17In order to receive a vertically polarized wave, the conductor of the dipole should be mounted
- A)at an angle of 60 degrees
- B)horizontally
- C)vertically
- D)at an angle of 45 degrees
18The power gain of a half-wave dipole with respect to an isotropic radiator is
- A)6 dB
- B)2.15 dB
- C)7.25 dB
- D)10.12 dB
19Distortion measurement can be made separately on
- A)transmitters
- B)d.c. lines
- C)VF channels
- D)All of these
20Distortion measurement can be made separately on
- A)transmitters
- B)d.c. lines
- C)VF channels
- D)All of these
Explanation: Repeats Q19.
21In ground wave propagation the absorption of waves
- A)decreases with frequency
- B)increases with frequency
- C)both (a) and (b)
- D)none of the above
22Which of the following crystal filter is used only at the higher frequencies?
- A)Half lattice
- B)Ladder
- C)Crystal gate
- D)none of the above
Explanation: As usually keyed.
23Which of the following amplifier circuit using junction transistor has the best gain?
- A)Common emitter
- B)Common collector
- C)Common base
- D)None of the above
24Which of the following filter is generally used in SSB generation?
- A)LC filter
- B)Crystal filter
- C)Active filter
- D)Mechanical filter
Explanation: As usually keyed.
25The upper limit for transmission time is given by
- A)16.7 ms
- B)12.5 ms
- C)13.5 ms
- D)17.8 ms
Explanation: As usually keyed.
26Feedback reduces sensitivity of the ratio of output to input to variations in
- A)bandwidth
- B)system characteristic
- C)open-loop system
- D)none of the above
27The gain of a simple half-wave dipole over an isotropic radiator is of the order of
- A)7 dB
- B)5 dB
- C)3 dB
- D)2 dB
Explanation: 2.15 dB.
28In R.F. characteristic, the type of vision modulation is
- A)AM positive
- B)AM negative
- C)both (a) and (b)
- D)none of the above
Explanation: Negative AM is used by most TV systems, including PAL in Pakistan.
29Neper is
- A)equal to decibel
- B)smaller than decibel
- C)both (a) and (b)
- D)none of the above
Explanation: 1 neper ≈ 8.686 dB, so it is larger than a decibel.
30Channel capacity is equal to
- A)amount of information per second
- B)noise rate
- C)bandwidth of demand
- D)none of the above
Explanation: The maximum rate of information transfer.
31Which of the following section plays significant role for sensitivity and selectivity?
- A)IF
- B)Mixer
- C)Detector
- D)None of these
32Audio frequency range lies between
- A)30 MHz and 250 MHz
- B)20 Hz and 20 kHz
- C)50 MHz and 500 MHz
- D)35 Hz and 45 kHz
33In a radio receiver the noise is generally increased by
- A)power supply
- B)mixer
- C)local oscillator
- D)none of the above
34A beat frequency between 1500 kHz and 1955 kHz is: (a) 435 kHz (b) 350 kHz (c) 665 kHz (d) 750 kHz
Answer: The difference is 455 kHz, which is not among the printed options (435 kHz is probably a misprint).
35In case of low level amplitude modulation system, the amplifiers following the modulated stage must be
- A)non-linear device
- B)class C amplifiers
- C)linear device
- D)both (a) and (b)
36Treble tone of loud speakers corresponds to
- A)low frequencies
- B)high frequencies
- C)low amplitudes
- D)high amplitudes
37A transponder comprises of
- A)transmitter
- B)receiver
- C)antenna
- D)(a), (b) and (c)
38In radar system, in type B indicator, the cathode ray beam is modulated in intensity to indicate
- A)the position
- B)the target
- C)the enemy
- D)None of these
Explanation: Repeats Q3.
39Which is the largest desert in the world.
- A)Arabian
- B)Australian
- C)Sahara
- D)Gobi
Explanation: The Sahara is the largest hot desert.
40The longest river of the world is
- A)Nile
- B)Lena
- C)Parana
- D)Congo
41When was the Radcliffe award announced: (a) 15 August 1948 (b) 15 August 1947 (c) 15 August 1949 (d) 18 August 1945
Answer: None of the printed dates is right: the Radcliffe Award was published on 17 August 1947.
42When was Liaquat Ali Khan assassinated?
- A)17 October 1951
- B)16 October 1951
- C)18 October 1951
- D)None of these
43Which one is the largest Island in the world
- A)Borneo
- B)Great Britain
- C)Victoria
- D)Greenland
44Jinnah's famous fourteen points were formulated in;
- A)March 1923
- B)March 1924
- C)March 1925
- D)March 1929
45When Muhammad Bin Qasim Defeated Raja Dahar;
- A)712
- B)713
- C)715
- D)718
46Name the leader who took active part in forming Muslim League in Baluchistan
- A)Qazi Muhammad Isa
- B)Qazi Muhammad Moosa
- C)Qazi Saeed
- D)Ghulam Muhammad Chowdhray
47The third round table conference was held in;
- A)1930
- B)1932
- C)1934
- D)1933
48The Federal Shariat court was established in;
- A)24th June 1980
- B)22nd June 1980
- C)25th June 1980
- D)None of these
Explanation: It was set up by President's Order in May 1980 (functioning from 28 May 1980).
49When was Pakistan Conference Held in Islamiya College Lahore?
- A)1942
- B)1941
- C)1940
- D)None of these
Explanation: The Punjab Muslim Students Federation's Pakistan Conference, March 1941.
50Give the date of arrival of Simon Commission in India?
- A)3rd November 1928
- B)3rd December 1928
- C)3rd February 1928
- D)None of these