7 Feb 2014

DGCA JUNE 2012 IS PAPER, INSTRUMENT SYSTEM





(# IS THE ANSWER)

1.The point at which angle of attack is in
equilibrium
#.rigging incidence
b.equlibrium point
c.critical point

2. Si-Semiconductor
a.0.707 ev
b.1.21 ev
#.1.1 ev
3.Instrument transformer
a.voltmeter
b.wattmeter
c.ammeter
#. all
4.In 'HDG' mode
#command bar provide lateral guidance to achieve
and maintain a compass heading , as selected on the
course indicator
5. Which one is related to autopilot
a.stablity hold
#.airspeed hold
c.localizer hold
6. warning flag in ADI
#.Gs GYRO computer
7.In HSI course select & heading knob is
a.permit the selection of desired localizer, vor radial
& desired magnetic heading
8.EDI
a. Altitude prescribed in and 2-dimensional display
#.Altitude is displayed bt a stationary delta shaped
9.In EDI
a.command bar form a shallow inverted "v" and
drive by servometer within the indicator
#.command bar form a shallow inverted "v" and
drive by a seperate servometer within the indicator
c.command bar is shallow
10. in capacitor tube
a#.outer and inner tube have low Z and middle has
high Z
11. In capacitor type fuel guage sys.
# variable capacitance located in the fuel tank
amplifier and an indicator
12.Tempreature compensation in RPM indicator
#.magnetic shunt adjacent of magnet
13. Iron loss in transformer
a.hysterisis loss
b. EI loss
c. both a and b
14.Highest gear ratio in synchro
a.72:1
b.36:1
c.18:1
15MTCS
a.transmission error in dynamic error and cariolis
error is static erroe
b.transmission error is compensated by inserting Z
btwn
16.MHRS located in(flux valve)
a.lateral
b.horizontal
#.azimuth
17.In TSI
a. no erecting device is required
b.as in a and rotor speed is low
18.IN AH, accleration during turn causes
#.starboard bank and climb up
19.In AH freedom of gimbal ring
a. 360 in roll and 85 pitch
20. apparent drift is controlled by
a.accurately balancing the inner gimbal ring
22.Ridigity and precession propert of gyroscope
depends on
a.conservation of linear momentum
#.coservation of angular momentum
23.MTCS
a. made for a particular type of a/c is indicated by a
preadjusted lubber mark located over the dial of the
machmeters
24.Drain holes
a.underside of press head
25.LED
a.recombination of e-s and holes
26.Thermo-magnetic shunt
a.made up of NI- alloy
b.as in a and inc. the flow as dec. in outside temp.
27.Alert messages
#.non-volatile memeory of eicas
b.non-voltage memory of eicam
28.Guage pressure
a.absolute pressure-atmospheric pressure
29.At some angle of attack the velocity of airflow
a.increase over the upper surface
31.Go around mode can be engaged
a. Radio altitude is less than 2000ft. and autothrottle
engaged
32.ILS glideslope, outer dots
a.1/2 displacement from the beam centre
33.supply to LCD
a. AC with diffrent polarity
34.Electric VSI
a.altiyude rate signal is in phase during ascent
b.as in a and I/P is phase reversing 400Hz signal
35.In X-OR output in only when I/P is
a.same
#.diffrent
36.Latitude and Longituding is inserted
a.during gyroscoping
37.Symbol generator provides
a.Analog discrete and signal interfacing between
A/C sys. display unit and the control panel
38. To prevent any loss of pressure change effects
created by displacement at the accleration pump
there is
a.Resistor in the bypass live
39.Which unit provides power to INS when main
power supply is unoperational
a.Battery unit
40.Which setting has the advantage of all A/C using
ther same airspace and flying on the same altimeter
setting the requisite limits of seperation btwn a/c
can be readily maintained
#.SAS
b.QFE
c.QNH
41.sensitivity of instrument is
#.accuracy
b.precession
42.Engine vibration monitoring
a.power supply 24v AC, 400 Hz
b.consist a spring suspended permanent magnet
c.scale calibrated in the freq.
43.If pitot probe blocked and drain holes open ASI
sescends
a.over read
b.under read
#.under read
44.Real drift is due to
a. bearing function
b. gimbal unbalance
c. both A and b
45. what will be the result if the instrument static
line becomes disconnected inside a pressurized
cabin during crusuing
a. both altimeter and ASI read low
46. Stic shaker motor vibrate the control column
when
a. stall speed is reached
47.In fms bubble memory is used for
a.holding bulk navigation data and performance
characteristics database
48.Factors to be considered for the location of pitot
probe
a.aerodynamic characteristics
b.speed of the a/c
c.type of a/c
d.all
49.Fast erection knob in artificial horizon 
a.used to bring gyroscope axis to vertical as soon as 
possible 
50.Alternate static vents in a/c are used to 
a. Balance out dynamic effect due to yaw 
#.primary static vents block due to avoid ice 
formation 
51.In bimettalic strap method of temp. comensation 
a. consist of INVAR and STEEL, which have low 
and high co-eff. of expansion resp. 
52.In auto pilot, which signal nullifies the input to 
the ailerons 
a. follow up signal is used
53.function of the display controller in an EFIS is 
a.allow the pilot to select appropiate sys 
configuration for the current flight situation 
54.What component in an autopilot sys applies 
torque to control surface of an aircraft 
a.controller 
b.gyro 
#.servo 
55.Magnetic compass bowl are fitted with a liquid 
to 
a.Damp the oscillation of the float 
56.Penta valent impurity to an intrisic 
semiconductor give 
a. no of free e-s 
57.If X- & Y- inputs of a CRO are respectively V 
sin(wt.) and -V sin(wt.) the resulting lissaios pattern 
will be 
a.St. line 
58.Which consumes more power 
a. 2 lamp 24V , 6amp connected in parallel 
59.Deflection sensitivity depends inversely on 
a. distance btwm Y plates 
81.BCD to analog conversion 
a.Digital to analog converter 
b.analog to digital 
c. mOS REGISTER 
60. WHAT is metallisation in IC fabrication 
A. forming interconnecting conduction patterns and 
bonding pads 
84. In instrument static press sys, deviation 
presented 
a.100ft./min. in 1 sec. 
85.During turn effect on ASI 
a. no error introduces because static vents are 
located at both side of fuselage 
86. Rate of climb of cabin altimeter is too great 
a. valve close fater 
87.Frame in FDR 
a.16bit 64 words 
88.In GH pitch torque motor 
a.Rotor stator casing 
89.In intel sat-'s' there all parallel transponders 
many of them would work at atime 
a.S (five) 
92.MTCS 
a.SSi-less than 10 
b.MSI- less than 99 
c.IVSI- above 1000 
d.ALL 
96.BCD of 86 
#.10000110 
b.1000110 
97.MTCS 
parameter sensor alt. semsor 
a.airspeed ADC ASI/main 
#.AOA vanc. diff. press sys 
c.flight patha and nav. data GPSI LORAn 
ILS,MLS,Ins 
98.when AFCS mode is engaged maneouver of a/c 
by 
a.flight ctroller 
99.when a/c power supply is on it is automatically 
supplied to the alt. sensing element and signal 
processing element to the control sys. so that they 
are in stand by condition---- 
when the engage s/w is in off pos. 
100. selseyn signal detected in servo system in 
which o/p is applied to the armature of Dc motor is 
passed through 
a. multi vibrator 
b.discrimnator 
#.phase sensitive demodulator 
d.ALL