aai junior executive atc question paper 1.doc

7/23/2019 AAI Junior Executive ATC Question paper 1.doc

http://slidepdf.com/reader/full/aai-junior-executive-atc-question-paper-1doc 1/3

Almost every year AAI (airport authority of India) organize exam for Junior Executive

ATC and Junior Executive Electronics. minimum ualification for these posts are as !

(") Junior Executive (ATC) #Engineering $egree in Electronics % Tele Communication%&adio Engg. % Electrical 'ith pecialization in Electronics 'ith Ist class (*+) ,& -.c

$egree or its euivalent 'ith 'ireless Communication Electronics &adio /hysics or

&adio Engg. as a special u01ect. ,& Euivalent 'ith "st Class(2*+ for C%T).

3 Junior Executive (Electronics) Engineering $egree in Electronics % Tele

Communication % Electrical 'ith specialization in Electronics 'ith Ist class (*+) ,&-.c $egree or its euivalent 'ith 'ireless communicationElectronics &adio /hysics

or &adio Engg. as a special u01ect. ,& Euivalent 'ith "st Class (2*+ for C%T).

exam for 0oth posts are of o01ective type and after 'ritten exam there are intervie' for 0oth post 0ut there is an additional voice test for the post of Junior Executive ATC.

exam paper of 0oth examination is of t'o hours and exam paper consists t'o sections

technical section and non technical section. ho'ever there are no fixed num0er ofuestions in exam some times total num0er of uestion may 0e "** oir some time it may

0e "2*. technical section contains 22+ to *+ (uestions from electronics %communication % micro'ave % digital electronics % control system % computer %

information technology) non technical uestions contains 4*+ to 4* + uestions (from

general 5no'ledge English language reasoning and general mathematics).

some model uestions from technical section is as given 0elo' !

". In a communication system noise is most li5ely to affect the signal(a) at the destination

(0) In the channel(c) in the information source(d) at the transmitter

3. Indicate the false statement. 6ourier analysis sho's that the sa' tooth

'ave consist of (a) fundamental and su0harmonic sine 'aves

(0) a fundamental sine 'ave and an infinite num0er of harmonics

(c) fundamental and harmonic sine 'aves 'hose amplitude decreases 'ith

the harmonic num0er (d) sinusoidal voltages some of 'hich are small enough to ignore in

practice

7. ,ne of the follo'ing types of noise 0ecomes a great importance at highfreuencies. Is the

(a) random noise

(0) shot noise(c) impulse noise

(d) transit!time noise

4.Indicate the false statement. The suare of the thermal noise voltage

generated 0y a resistor is proportional to



(a) its temperature

(0) Its resistance

(c) 8oltzmann9s Constant(d) the 0and'idth over 'hich it is measured

2.If the plate supply voltage for a plate modulated class C amplifier is : the

maximum plate!cathode voltage could 0e almost as high as(a)4v

(0)7v

(c)3v(d)"v

. ;hich one 'ill 0e sta0le if characteristics euation is

(a) A<3=8=C

(0) A<3!8!C(c) A<4=8<3=C=$

(d) !A<3=8!C

>.;hen micro'ave follo's curvature of the earth this I 5no' as

(a) fading(0) $ucting

(c) troposphere scatter (d) ionosphere reflection

?. 8road0and long distance communications are originally made possi0le 0y

the advent of (a) telegraph ca0les

(0) repeater amplifiers

(c) @6 radio

(d) eostationary satellitesB. 'itching systems

(a) Improve the efficiency of data transfer

(0) are not used in data system(c) reuire additional lines

(d) are limited to small data net'or5s

"*. 8asic group 8(a) occupies the freuency range from * to "*? 5 hz

(0) consist of erect channels only

(c) is formed at the group translating euipment

(d) consist of five super group"". In differential amplifiers the common emitter current is made constant

(a) To ma5e Ad (differential gain) very small

(0) To ma5e Ac (common mode gain) very small(c) To ma5e the amplifier symmetrical

(d) To 5eep C-&& constant

"3. iven 8C$ num0er "**" **"" its decimal euivalent is(a) "4>

(0) "47

(c) B7

(d) 7B



"7. An amplifier has voltage gain of 2*. this gain in d0 'ill 0e

(a) "> d0

(0) 7" d0(c) 74 d0

(d) ? d0

"4. In a E plane Tee the output of the t'o rams are(a) "?* degree out of phase

(0) In the same phase

(c) B* degree out of phase(d) none of these

"2. 'aveguide are generally made of

(a) Aluminium

(0) 8ronze(c) 8oth (a) and (0)

(d) none of these

Ans'ers".(0) 3.(a) 7.(d) 4.(a) 2.(a) .(a) >.(0) ?.(0) B.(a) "*.(a) "".(0) "3.(c) "7.(c) "4.(a) "2.(c)

aai junior executive atc question paper 1.doc

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