RN OCTOBER 2012 PAPER (Radio Navigation System)

(Note : '#' is the answer)

1. Bonding radio equipment to airframe will provide-#Low impedance path2. Ratio to max. to min. which is equal to SWR-#Swr=ZO/ZI & SWR=ZI/ZO which ever is larger3. During T/O "Glideslope" Glideslope warning comes due to-#Below ILS departure4. Speed of computer depends on-#memory5.In flight interphone if press P.T.T._#All PA speakers are mute + Mike is connected to line6 INS Consists of Gyroscope & acclerometer it will assist the aircraft in# Level flight7. In encoding ATC transponder altitude C pulse give binary code & A,B,D give pulse-# Gray code8. VSWR in short circuited transimission line equal to-# Infinity9.When captain like to communicate with flight crew on ASP, Capt will select-#Select INT switch on& select PA on RX. panel10.GPWS take refernce from A/C configuration radio altimeter-#Landing gear & flaps11Which couplers are considered of series of lens & partially refractive index-#Beam splitting Coupler12. Optical couplers are used for-#Isolate13. Conductor of wiring should carry out-#Crimping14. ELt activated by-#Parallel to a/c axis15.An ADF 180 ambiguity is removed by-#sense antenna16. In high speed A/C wire anteena replaced by prob & notch antenna by-#Inductance of the notch is resonated by high voltage variable capacitance17. Stablized master oscillator consist of-#Voltage control oscillator18. What is the frequency of 10m long wavelength-#30MHZ19.Track-# Direction in which A/C moves20. In general impedance of a/c Ant. is-#50 ohm21. In ILS amber illuminate on-# MIddle marker22. In EICAS system caution Amber light indicate-# Level B23. Padding capacitor used in-# Tracking24. In ATC Transponder Mode A does not provide-

# Altitude25. Which is non-omnidirectional-# Log periodic26. In CRT voltage signal is feed to-# Yplate27. Fading mostly occur in-# HF28. If an Ant. can receive both Horizontally and vertically beam but their intensity is uequal in baoth direction, known as# Elliptical polarization29. To reduce corona effect we use-# Static discharger30. When flag such as NAV, HDG, GS are disappeared on HSI, the indication is-#The function is inoperative31. In VOR which is not omnidirectional-# Variable signal32. In ILS system 150hz predominate in Localizer-# Blue light33. which device convert electrical power to EM waves-# Transmitter34. De-Modulate is device for-# Remove Intelligence from the signal35. In ILS Lateral Guideness provide by-# Localizer36. A alternator has 6 pole, what is the no. of cycle/rotation-A.6 B.12 C.3 D.none of the above37.. When A.C & D.C intersecting this point is known as-# Operating point38. Cockpit lighting is known as-# Flood lighting39. LED-# P-N junction diode + Emite light when connected in forward bias40. Vor Ant Installed in a/c-# On vertical stablizer41. For 900us, range should be-# 135NM42. Pin selection of AN/MS connector is normally installed-# Ground side of ckt43. Long Range Nav(LORAN) detect a/c location by-# Ground side og ckt44. Radio altimeter produce No voice when# When a/c on the ground45. In Radio Altimeter OFF Flag comes when-# Due to Power Failure46.In Wx Radar, Time taken by pulse Transmitted & received back-# Is Directly proportional to the Distance47. Rear Port Display utilizes-# Dynamic CRT48. When Transmitter Impedance lines equal-# SWR will be Minimum49. A/c Bonding Check in-

# Resistance Value50. Differnce b/t Micro Processor & Micro Computer-# Micro Processor has small memory & Micro Computer has large memory51. Range of VORTAC Beacon-# Inversely Proportional to distance from the way point52. In ADF Loop, Transformer & Rotor are single uniot is-# Goniometr53.IN a/c equipment installation in cockpit increase its-# Empty Weight54.Intensity of CRT does not depends on-# Time taken by the electron beam to strike the screen55.For proper propagation of waves in a wave guide, wave length used is-# Less than cutt-off wave lenght56.High resistance is measure by-# Meghaohmeter57.Interpol not used for-# Reduce Field Strength58.Mark the correct statement regarding VOR-A. Vor provide bearing to the a/c to the ground stationB. A+ frequency range is 108-112mhz#. A+ Frequency range is 108-118mhzD. B+ reference & Variable phase are used.59.ELT battery operate syatem upto-#48hr.60.1. Bonding is done with help of soldering for joining jumper to the a/c structure2. Bonding is done by crimping for loining jumper to the a/c structure#only 2 is correct61.The maxm. no. of joints in bonding at a pt.A.2 B.3 C.4 D.562.Which Motor used for Starting Piston Engines-# series wound63.Which motor used for starting piston engines-# Series wound64.Disadvantage og Half wave rectifier-# difficult to filter o/p65.A transformer have 250/3000 voltage ratio, if magnetic field density is 1.2wb/m, emf/turns of coil is 8V, thenIn secondary-# 37566.FLY-BY-WIRE system-# Is a system in which control surface moves electrnically67.Hot microphone is CVR-# Is always ON irrespective of any selection68.Delta-Delta connection-#phase voltage = line voltage69.IF Stage used in Fm receiver-# Convert input freq. in yo fix freq.70.MTCSA. Biltester used for internal checkup of component as specified by manufactureB. RAMP test is used for checking the external component of an a/c as specified by manufacture

#. B+Person shold posses valid license71.Wx. Radar Display-# Pencil shape72.AL Wire Ant. used in a/c due to-A. High strength/weight ratioB. Low resistanceC. Less chance of corrosionD. all of the above73.ADF Errors-# Night effect, loop alingment errors74.When Radar Rx. Received Reflected Echo waves-A. Target seems less distance than actualB. target seems more diatance than actualC. Target not visible at this stageD. None of the above75. Disadvantage of Wx. Radar-A. Not provide rangeB. Not provide DistanceC. Both A=BD. None of the above76. In ADF, Matching/ Equilazation ckt install-# close to the Ant.77.Noise is likely to be felt at# RF i/p Stage78.Mark the correct statementA. In waveguide the velocity of propagation is less than that in free space# A+ and not be TEM propagationC. A+ and TEM not propagate79.Coil A has Air core & Coil B has Iron core than-# Coil B has Higher inductance than Coil A80.Marker Beacon is Tested using-# Lamp switch81.In HF System it is working at only one freq. the possiblity of fault is in-# ATU82.After an ADF Ant. installed-# Loop must be calibrated