13. Aircraft aerodynamics, structures and systems - Q&A
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An aircraft receives a response from a DME station, 1236 microseconds after transmitting the interrogation. What is the slant range to the station?
- 96 nautical miles
- 100 nautical miles
- 104 nautical miles
My math says 100NM. Am I wrong?
GPS has
- 6 satellites in 4 orbits
- 4 satellites in 6 orbits
- 7 satellites in 3 orbits
24 satllites, not 4
A triplex system looses one channel, the system is now,
- fail passive
- fail operational
- fail redundant
shouldnt this be fail operational? it still has 2 channels
When can the FMS be engaged with the autothrottle
- only with the Flight Director selected
- With either the Flight Director or the Digital Control System (DFCS) engaged
- only after take off
I think this should have another option saying "before take off" because i have this as the correct answer
Other than spoilers, where are speed brakes located?
- On the wing
- Under the Fuselage
- Either side of the Fuselage
why
The frequency spectrum of noise is
- infinitely wide
- restricted to the audio band
- restricted to the HF band
is it really infinite?I think the normal is from 20hz to 20000Hz
Stall warning will be given at speeds
- that are higher than stall speed
- that are lower than stall speed
- at the actual stall speed
how will it give the stall warning for speeds which are higher thatn the stall?If this happens we will already have stalled.I think the correact asnwer should be for speeds bellow the stall speed.In order to indicate the pilot that he should decrease his speed not to reach the stall.
CVR is unserviceable
- The aircraft cannot fly unless required data is recorded by FDR
- The aircraft can fly for 72 hours since unserviceablity
- The aircraft can fly for 4 days since unserviceablity
i also think this is wrong.The aircraft is not airworthy is it doesnt have a CVR .Especially when we are talking about civil aviation which the licenses refer to.
Fluorescent tubes for the cabin lighting are powered from
- 115 volts from ac bus
- 200 volts from ac bus
- high voltage produced by transformer ballast units
i think this is wrong it should be 115V ac not high voltage.
Cat 2 RVR if the alert height is 100 feet will be
- 300 m
- 400 m
- 800 m
i think it should be 200m
When installing multiple batteries on aircraft they are connected in
- parallel
- series
- either parallel or series and switched between as an option
I think the correct answer is parallel.
T.C.A.S transmits squitter pulses on a frequency of
- 1060 MHz
- 1030 MHz
- 1090MHz
This is wrong guys it should be 1030 .The receiving is on 1090Mhz the transmitting is 1030.
Bandwidth of HF transmission is
- 1 khz
- 1.5 khz
- 3 khz
The correct answer is 2Khz-29.92Khz and spacing 1Khz
If on a lead-acid battery, several cell checks of SG read consistently low. Battery needs
- topping up with distilled water
- replacing
- recharging
Shouldnt it be replacing?Because we've already performed several cell checks and it remains low .
The length of a resonant antenna dipole is
- lambda
- lambda/2
- lambda/4
this is wrong in this website is has the same question with the correct answer being "lambda/2" .
If a QFE is set at an airfield and flown to another airfield at the same level above sea level then
- it will not need resetting and will read zero
- it will display the airfield height above sea level
- it will probably not need resetting and will read zero
what is the purpose of the 2 answers here?They are basically the same apart from the word "probably" .
To improve the image or picture when using the WRX (weather radar receiver)
- scan at a lower rate
- use shorter bursts
- use longer bursts
i think this is wrong my notes from my academy say 'scan at lower rate" .
The versine signal is used in the
- pitch channel only
- roll channel only
- pitch and roll channel
This is wrong,versine is for roll channel only.
What does a trim tab do?
- Eases control loading for pilot
- Allows the C of G to be outside the normal limit
- Provides finer control movements by the pilot
shouldn't this be servo tab?.The servo tab eases the loading.
Alert Height is when
- a decision of whether to land is made
- an alert of the altitude of the aircraft is made
- an alert of the ground proximity is made
There are two same questions and two different answers. In this case the correct answer is an alert of the altitude of the aircraft is made. Other case correct answer is a decision of whether to land is made.
So what is the right answer then?
A GNS satellite system transmis
- vertically polarise
- horizontally polarise
- right hand circular
Please write your comment here.
When approaching the speed of s
- pressure above the wing the wing in places
- pressure above the wing equals the pressure below the wing
- pressure above the wing can never exceed the pressure below the wing
Can somebody place full question and answer? Should it be "speed of sound"?
The ATC aerial has a polar diagram which is
- directional
- omni-dirrectional
- limacon shaped
Directional? Maybe they have in mind radar antenna?
With a bonding meter
- the long lead is attached to the aircraft air frame and short lead to item
- the short lead to the aircraft airframe and long lead to the item
- it does not matter which lead goes where
Could you show which lead is longer on most common T477W bonding meter? I hope there won't be such questions on real exam...
Mode C response is
- 21microseconds
- 12 microseconds
- 8 microseconds
I think it should be 21microsec p1 n p3 respond