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question_answer1)
The black and white or monochrome portion of the total colour signal is equivalent in all respects to present........... signals.
A)
black and white done
clear
B)
red and blue done
clear
C)
yellow and green done
clear
D)
red and yellow done
clear
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question_answer2)
The illumination on screen when there is no broadcast or telecast, is known as
A)
raster done
clear
B)
contrast done
clear
C)
both [a] and [b] done
clear
D)
none of the above done
clear
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question_answer3)
The demodulation of sound signals in a TV receiver is accomplished by
A)
envelope detector done
clear
B)
discriminator done
clear
C)
both [a] and [b] done
clear
D)
none of the above done
clear
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question_answer4)
In TV receivers, the electron beam is deflected by
A)
electromagnetic technique done
clear
B)
electrostatic technique done
clear
C)
both [a] and [b] done
clear
D)
none of the above done
clear
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question_answer5)
A primary colour differs from its complementary by a phase angle of
A)
\[180{}^\circ \] done
clear
B)
\[\frac{\pi }{3}\] done
clear
C)
\[\frac{\pi }{4}\] done
clear
D)
\[\frac{\pi }{6}\] done
clear
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question_answer6)
The linearity of a TV receiver can be checked by
A)
multiplier done
clear
B)
vector gram done
clear
C)
both [a] and [b] done
clear
D)
none of the above done
clear
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question_answer7)
Equalizing pulses in TV are sent during
A)
vertical blanking done
clear
B)
horizontal blanking done
clear
C)
both [a] and [b] done
clear
D)
none of the above done
clear
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question_answer8)
A total colour signal consists of
A)
one component done
clear
B)
two components done
clear
C)
five components done
clear
D)
three components done
clear
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question_answer9)
A live programme is transmitted from location to TV station through
A)
cables done
clear
B)
wireless done
clear
C)
antennas done
clear
D)
none of the above done
clear
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question_answer10)
Colour TV camera is essentially a combination of............... basic cameras.
A)
five done
clear
B)
two done
clear
C)
four done
clear
D)
three done
clear
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question_answer11)
For 51 cm size TV the voltage required for picture tube is the order of
A)
13 kV done
clear
B)
15 kV done
clear
C)
17 kV done
clear
D)
25 kV done
clear
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question_answer12)
Which of me following signals is not transmitted in colour TV?
A)
Q done
clear
B)
I done
clear
C)
R done
clear
D)
none of the above done
clear
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question_answer13)
Which channel has the highest frequency range?
A)
Channel? done
clear
B)
Channel 5 done
clear
C)
All channels have same frequency range done
clear
D)
None of the above done
clear
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question_answer14)
The signal sent by the TV transmitter to ensure correct scanning in the receiver are called
A)
chrome done
clear
B)
sync done
clear
C)
video done
clear
D)
none of these done
clear
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question_answer15)
The light is converted into video signals corresponding to the red, blue and green components of the............. picture.
A)
white done
clear
B)
black done
clear
C)
red done
clear
D)
original colour done
clear
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question_answer16)
Which of the following conducts during fly back?
A)
Silicon diode damper done
clear
B)
Output stage done
clear
C)
High voltage rectifier done
clear
D)
None for the above done
clear
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question_answer17)
The output of the vertical amplifier applied to the yoke in a TV receiver, consists of
A)
a saw tooth voltage done
clear
B)
a saw tooth current done
clear
C)
both [a] and [b] done
clear
D)
none of the above done
clear
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question_answer18)
The method of modulation of sound in TV system in India is
A)
amplitude modulation done
clear
B)
frequency modulation done
clear
C)
both [a] and [b] done
clear
D)
none of the above done
clear
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question_answer19)
Which of the following are secondary colours?
A)
All colours other than green, blue and red done
clear
B)
Green, blue and red done
clear
C)
White and black done
clear
D)
None of the above done
clear
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question_answer20)
In TV if three is no brightness but sound is normal, the trouble could be in
A)
horizontal oscillator done
clear
B)
vertical oscillator done
clear
C)
both [a] and [b] done
clear
D)
none of the above done
clear
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question_answer21)
A number of different colours can be formed by the combinations of colours in
A)
two colours done
clear
B)
three colours done
clear
C)
five colour done
clear
D)
seven colours done
clear
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question_answer22)
The fine tuning control in television receiver is
A)
a potentiometer done
clear
B)
a variable capacitor done
clear
C)
both [a] and [b] done
clear
D)
anyone of the above done
clear
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question_answer23)
In TV. system
A)
picture and sound are frequency modulated done
clear
B)
picture and sound are amplitude modulated done
clear
C)
picture is amplitude modulated while sound is frequency modulated done
clear
D)
none of the above done
clear
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question_answer24)
TV broadcasting system in India is as per CCIR
A)
system X done
clear
B)
system B done
clear
C)
system A done
clear
D)
system I done
clear
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question_answer25)
The sound signal in video composite signal of TV is
A)
FSK done
clear
B)
AM done
clear
C)
FM done
clear
D)
none of the above done
clear
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question_answer26)
The three primary colours are
A)
red, orange and blue done
clear
B)
red, blue and green done
clear
C)
red, yellow and blue done
clear
D)
none of the above done
clear
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question_answer27)
The number of frames per second in TV system in India is
A)
25 done
clear
B)
80 done
clear
C)
20 done
clear
D)
75 done
clear
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question_answer28)
Which of the following will increase the antenna radiation efficiency?
A)
Providing insulation on conductor done
clear
B)
Top loading of antenna done
clear
C)
Both [a] and [b] done
clear
D)
None of the above done
clear
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question_answer29)
Which of the following is non-resonant antenna?
A)
The folded dipole done
clear
B)
The end-fire array done
clear
C)
The broad side array done
clear
D)
Both [b] and [c] done
clear
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question_answer30)
Scatter transmission is used at frequencies
A)
Very low frequency (VLF) done
clear
B)
Ultra high frequency (UHF) done
clear
C)
Very high frequency (VHP) only done
clear
D)
Both [b] and [c] done
clear
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question_answer31)
A helical antenna is used for satellite tracking because of its
A)
maneuver ability done
clear
B)
broad width done
clear
C)
good FBR done
clear
D)
none of the above done
clear
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question_answer32)
Which type of fading causes serious distortion of modulated signal?
A)
Polarization fading done
clear
B)
Absorption fading done
clear
C)
Selective fading done
clear
D)
Both [a] and [b] done
clear
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question_answer33)
Which of the following antenna gives circular polarisation?
A)
Helical done
clear
B)
Dipole done
clear
C)
Both [a] and [b] done
clear
D)
None of these done
clear
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question_answer34)
Which antenna does not depend on frequency?
A)
Log periodic antenna done
clear
B)
Yagi antenna done
clear
C)
Both [a] and [b] done
clear
D)
None of the above done
clear
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question_answer35)
The frequency range for satellite communication is
A)
3000 to 30,000 MHz done
clear
B)
2000 to 25,000 MHz done
clear
C)
45,000 to 65,000 MHz done
clear
D)
75,000 to 1,25,000 MHz done
clear
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question_answer36)
The gain of a current element is
A)
1.76 dB done
clear
B)
2.52 dB done
clear
C)
3.58 dB done
clear
D)
7.25 dB done
clear
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question_answer37)
The power gain of a half-wave dipole with respect to an isotropic radiator is
A)
6 dB done
clear
B)
2.15 Db done
clear
C)
7.25 dB done
clear
D)
10.12 dB done
clear
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question_answer38)
In order to receive a vertically polarized wave, the conductor of the dipole should be mounted
A)
at an angle of \[60{}^\circ \] done
clear
B)
horizontally done
clear
C)
vertically done
clear
D)
at an angle of\[45{}^\circ \] done
clear
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question_answer39)
A loop antenna is commonly used for
A)
direction finding done
clear
B)
satellite communication done
clear
C)
radar done
clear
D)
both [b] and [c] done
clear
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question_answer40)
Which of the following is multiband high frequency receiving antenna?
A)
The folded dipole antenna done
clear
B)
Log-periodic antenna done
clear
C)
Square loop antenna done
clear
D)
None of the above done
clear
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question_answer41)
The gain factor of a half dipole is
A)
1.641 done
clear
B)
1252 done
clear
C)
3.25 done
clear
D)
7.95 done
clear
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question_answer42)
The most important ionizing agents are
A)
ultra violet and\[\alpha \],\[\beta \], and\[\lambda \]radiations from the Sun as well as cosmic rays and meteors done
clear
B)
infrared radiation being emitted by ground reactions occurring near the surface of earth done
clear
C)
radiations and emissions by the polluting industries on the earth done
clear
D)
none of the above done
clear
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question_answer43)
Broadcasting antennas are generally
A)
vertical type done
clear
B)
horizontal type done
clear
C)
both [a] and [b] done
clear
D)
none of the above done
clear
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question_answer44)
The night effect is most prominent in
A)
vertical antenna done
clear
B)
ad cock antenna done
clear
C)
loop antenna done
clear
D)
both [a] and [b] done
clear
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question_answer45)
D-layer of ionosphere extends approximately from
A)
95 to 150 km done
clear
B)
50 to 90 km done
clear
C)
110 to 250 km done
clear
D)
135 to 270 km done
clear
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question_answer46)
An antenna is
A)
capacitive coupled done
clear
B)
inductive done
clear
C)
both [a] and [b] done
clear
D)
none of these done
clear
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question_answer47)
For aeroplane and navigation preferred frequency band is
A)
Very high frequency band done
clear
B)
Very low frequency band done
clear
C)
Ultra high frequency band done
clear
D)
none of the above done
clear
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question_answer48)
Anomalous propagation is due to
A)
troposcatter done
clear
B)
super refractive duct done
clear
C)
meteorological factors done
clear
D)
none of the above done
clear
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question_answer49)
If frequency of modulated wave is less than frequency carrier wave, then input signal is
A)
Negative done
clear
B)
Positive done
clear
C)
Zero done
clear
D)
Infinite done
clear
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question_answer50)
Decrease in strength of signal is known as:
A)
tuning done
clear
B)
modulation done
clear
C)
attenuation done
clear
D)
amplification done
clear
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