Janardan Rai Nagar Rajasthan Vidyapeeth 2006 B.Tech Aeronautical Engineering AVIONICS I - Question Paper
JRN Rajasthan Vidyapeeth University
AERONAUTICAL ENGINEERING
SEMESTER 5
AVIONICS I
Model Question Paper
BTAE2 AVIONICS I
Time : 3 hrs Maximum marks : 75
Instruction:
1. Question paper is divided into Group A, Group B and Group C
2. Each Group is 25 Marks
3. Figure to the right in bracket indicates marks.
4. Good Handwriting is expected
5. Assume suitable data if necessary.
Group A (25 Marks)
Answer any three questions (Question 1 is compulsory)
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Q.1 Prove with a diagram that electromagnetic waves passing from a denser to a rarer medium are bent away from the normal
Q.2 Describe briefly the resonant antennas & radiation patern
Q.3 explain the term magnetron with diagrm.
Q.4 Derive the Hartley law (verbally ) for binary code, using the CCITT-2 code to
prove the relation ?
Q.5 describe the pulse width modulation with diagram.
Group B (25 Marks)
Answer any three questions (Questions 6 is compulsory)
Q.6 describe the wave-guide coupling.
Q.7 describe the moving target indication & explain Doppler effect .
Q.8 An MTI radar oprettes at 5 GHz with a pulse repetation frequency of 800pps
calculate the lowest three blind speed of this radar.
Q.9 Explain the impedance matching and tuning.
Q.10 Write the applications of point to point communication. Determine the length
of an antenna operating at a frequency of 500 KHz.
Group C (25 Marks)
All Questions are Compulsory.
Q.11 Fill in the blanks ( each question carry 2 marks)
1) The behaviour of waves in circular waveguide is the same as in _______________.
2) The physical length of the antenna must equal ______________ of the transmitte
signal
3) The antenna must have the ability to match the _________.
4) The phenomenon has led to the development of the hollow conductor of known as _______________.
5) ______________ is defin as the choice of finit set of message
(B) Choose the best answer (Each question carries 2 Marks ):
1) indicate which of the following is not a binary code
(a) morse (b) baudot. (c) ccitt-2. (d) arq.
2) __________ is a low power efficiency micro wave oscillator
(a) cfa (b) coaxial magnetron (c) reflex. (d) traveling wave magnetron.
3) __________ can evan measure the direction of the target, in addition to its speed.
(a) the mti system (b) moving target plotting on the ppi (c) fm radar (d) cw radar
4) indicate the antenna that is not wide band .
(a) discone (b) folded dipole (c) helical (d) marconi.
5) The basic supergroup is formed in
(a) gte (b) cte (c) fdm (d) tdm .
(C) State true or false (Each question carry 1 Mark ):
1. Modulation is used to reduce the bandwidth .
2. In an SSB transmitter, one is most likely to find a tuned modulator .
3. The absorption of radio waves by the atmosphere depends on their frequency . s
4. The most common modulation system used for telegraphy is pulse code modulation .
5. The SWR on transmission line is infinity , if line is terminated in a complex impedance.
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| Earning: Approval pending. |
