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Instruments > BGS post its - Inst > Flashcards

BGS post its - Inst Flashcards

1
Q

What do capacitor fuel guages measure?

A

The charge held in the capacitors

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2
Q

Do IRS/INS systems search for longitude?

A

no

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3
Q

when does gimbal error occur?

A

when gimbals arent completely at 90deg to eachother, like during banking.

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4
Q

What can we deduced with CAS and pressure altitude?

A

EAS

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5
Q

is the FMS approved for ILS approaches?

A

no

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6
Q

What is quadrantal deviation corrected by?

A

pairs of permanent magnets

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7
Q

What do paddle wheels or mechanical fuel flow meters measure?

A

the volumetric flow via counting the frequency of impulses from the impeller

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8
Q

What is the blue radial line on an ASI an indication of?

A

Best single engine rate of climb speed (Vyse)

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9
Q

What is the basic on-board DL comms system made up of?

A

comms management unit (CMU)

multi-purpose control and display unit (MCDU)

comms unit (HF, VHF, Satcom)

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10
Q

what is maintained after CWS?

A

Flight attitude in that moment

NOT track

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11
Q

What is the equation that relates SAT to TAT?

A

SAT = TAT/(1 + 0.2KrM2)

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12
Q

What does FADEC provide?

A

fully automatic engine starting and thrust reverser control

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13
Q

What is the order of operation types for dual operation FMSs?

A

normally dual mode with a master and slave FMS

if a large discrepancy exists then they act seperately

if one FMS fails completely then both displays will run from one FMS

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14
Q

How does the autopilot roll-out mode maintain rwy centreline?

A

controlling rudder/nose wheel steering

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15
Q

What is the disadvantage of single phase AC tachogennys?

A

the importance of line resistance on the information value.

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16
Q

What kind of pressures are aneroid capsules used to measure?

A

low pressures (eg air intake pressure of gas turbine engine/ manifold pressure)

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17
Q

What does the compressibility correction to CAS to get EAS always do to the value and what does it depend on?

A

it always decreases it (-ve) and it only depends on speed

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18
Q

What is FMS VNAV management based on?

A

barometric altitude input from the ADC

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19
Q

What are the advantages of a DC tachogenny?

A

easy transmission of info an no external electrical power supply required.

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20
Q

Does the nav display show decision height?

A

no

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21
Q

What is a data bus?

A

something that transfers digital signal across various systems

22
Q

What happens to the rad alt indication when there is an error on approach?

A

the entire indication is removed.

23
Q

Where does IRS get the information required to calculate mag heading from the true heading measured by the system?

A

from its own internal memory.

24
Q

what do guidance functions of A/P monitor?

A

movements of the aircraft CG in 3D space

25
Q

What do basic functions of A/P monitor?

A

orientation of the A/C around it’s CG.

26
Q

does the FMS flight plan/leg page display A/C position?

A

no

27
Q

are yaw dampers able to be used to balance a turn?

A

no - they are not designed for that.

28
Q

during autoland, what does A/Ps use to decide vertical speed?

A

rad alt height.

29
Q

what is the indicated by the start and end of the green scale on an ASI?

A

start - Vs1

end - Vno

30
Q

how much deviation from a flight path or attitude will failure of a fail-passive system cause?

A

no significant deviation.

31
Q

is a gyro magnetic compass free in azimuth?

A

no it is slaved/tied to the horizontal

32
Q

What kind of things can an A/P system provide?

A

functions of piloting and guidance of A/C in horizontal and vertical planes.

33
Q

what does a thermocouple produce with an increase in temperature?

A

a voltage

34
Q

what error in pitch will an airtificial horizon always produce in a turn and how does it vary?

A

it always shows pitch up through a full 360 being worst at 180deg and none and 360deg.

35
Q

In a steep turn, what is the northerly turning error on a magnetic compass in the NH equal to?

A

180deg on a 090 hdg in a right turn

36
Q

Where is the temperature measured by the CHT probe measured from?

A

within the hottest cylinder.

37
Q

When does autosynchronisation prevent snatch?

A

upon engaging the A/P

38
Q

When does auto trim / pitch prevent snatch?

A

upon disengagement of A/P

39
Q

What are the requirements of the microphone in a CVR?

A

it must be in compliance with shock and fire resistance standards.

40
Q

What are the EGT parameters shown on an EFIS?

A

Instantaneous EGT

max continuous EGT limit

max TO EGT limit

max start EGT limit

41
Q

how is total fuel consumption obtained?

A

by integrating fuel flow with time.

42
Q

What are the basic/inner loop functions of A/P?

A

pitch attitude hold

horizontal wing/roll hold

43
Q

What are the guidance/command/flightpath/outer loop modes of A/P?

A

Altitude hold

Airspeed/M hold

V/S hold

hdg hold

ILS tracking

VOR tracking

LNAV

VNAV

44
Q

what do vertical/lateral flight path modes not include?

A

speed mdoes

45
Q

What are the speed modes of autopilot?

A

Pitch attiude hold

airspeed/M hold

V/S hold

46
Q

What is the main advantage of ratiometer type temperature indicators?

A

they carry out an independant measurement of the supply voltage.

47
Q

What does the CPDLC function consist of for FANS application?

A

exchanging messages relative to

  • route modification
  • crossing contraints
  • transfer of ATC center
  • speed changes
48
Q

out of static and pitot tubes, which can be affected by position error?

A

both

49
Q

what is the relationship between the temperature of the hot junction and EMF of a thermocouple?

A

E = K x Th

E - EMF

Th - temp of hot junction

K - constant

50
Q

What do capacity fuel gauges measure?

A

mass from SG and volume which is independant of temperature.

51
Q

In a climb, how does the computer keep thrust constant?

A

by adjusting N1

52
Q

What are the FMS vertical command outputs?

A

flight path angle

speed target.

Instruments (27 decks)

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