13. Aircraft aerodynamics, structures and systems - Q&A
60 questions found
Browse by module
The autothrottle controls the aircraft
- vertically
- laterally
- both later ally and vertically
Please explain
The length of a resonant antenna dipole is
- lambda
- lambda/2
- lambda/4
Q897) The length of a resonant antenna dipole is -lambda/2
Q955) The length of a resonant antenna dipole is -Lambda/4
There can only be one answer? I think - Lambda/4
Any ideas?
Medium vibration of 4 to 6 times per revolution is experienced on a helicopter. The primary control method is
- inspect loose fixtures and fittings
- design of engine and gearbox supports
- inspect main rotor head and main drive shaft
I selected
-Design of engine and gearbox supports
Medium and High frequency Vibrations – Depending on the helicopter the source may be engine and transmission cooling fan and accessories such as air conditioner compressors, or driveline components.
Any ideas?
The specific gravity readings of a lead-acid cell taken twice after charging shows substantially lower value.
- Cell is defective
- You top up the cell with distilled water
- You replace the cell
is this question tricky or this question is acting devil, why can't "replacing the cell" be a right answer. but i consider both answer to be correct. if any one can lighten up then that would be wonderful.
A radar antenna is facing left. On ground test, if you move the vertical gyro to simulate a right bank, the antenna
- will move up
- will move down
- will not move
Help please! can any body picture this?
Automatic trim is used to
- maintain level flight
- prevents standing loads on the elevator
- allow full authority to be regained by the aileron
MAINTAIN LEVEL FLIGHT?
on power up, the IRS obtains position
- latitude from previous position
- longitude from previous position
- latitude and longitude from previous position
I have read many conflicting answers on the net and i thought i came to the decision it was LAT, any explanations?
An auto land system displays Land 2 another failure will make the system
- operational
- passive
- simplex
Why would this not be simplex if it was origionally Cat 2? i thought a Cat 3 failure makes is Passive?
in a CMC aircraft, flight deck indications and warnings are managed and provided by
- the central warning computer (CWC)
- the electronic interface units (EIU)
- the engine indicatig and crew alert system (EICAS)
Would not be EICAS? 'Flight Deck Indications' ??
If one FMS fails in a duel system
- system operation will not be affected
- FMS CDU on fail side goes blank
- FMS display transfers automatically from serviceable computer
dual system......first answer looks good ??????
The loss of the vertical gyro signal to the flight director system would cause
- aircraft to underbank
- aircraft to overbank
- aircraft to remain in level flight
acft. to remain in level flt. as there is no input for pitch and roll
An aircraft is on course on an ILS Localiser. What is the depth of modulation?
- zero
- 20%
- 50%
depth of mod zeroooo??
with no.1 h.f. system transmitting the interlock circuit
- allows no.2 h.f. to receive only
- allows no.2 h.f. to transmit and receive
- does not allow no.2 to transmit or receive
VHF CAN RECEIVE WHY NOT HF?
A typical emergency locator transmitter (ELT)
- receives 2 frequencies
- transmit 3 frequencies
- transmits 2 frequencies
CAPABLE OF TRANSMITTING IN 3 FREQ.
In a combined pitot-static probe, while carrying out a leak check, which instrument is most likely to be effected by over pressure?
- ASI
- VSI
- Altimeter
MY ANSWER IS ASI
Versine signal is governed by
- roll
- pitch
- yaw
NOT TOO SURE ABOUT IT ....PITCH LOOKS TO BE MORE CORREST
Man made noise
- mainly above 12mhz
- only in the LF band
- mainly below 12 mhz
20hz to 20khz....how come mhz ????????
If one FMS fails in a dual system
- system operation will not be affected
- FMS CDU on fail side goes blank
- FMS display transfers automatically from serviceable computer
for DIMKY
High and low signal to voter are
- average
- removed
- added
most +ve and most -ve are removed....???
What is the time between the F2 framing pulse and the SPI?
- 1.45 ms
- 2 ms
- 4.35 ms
if you could explain this
The maximum azimuth coverage by a MLS facility is
- +/- 35 degrees
- +/-40 degrees
- +/-60 degrees
pls confirm i am aware of +/- 40
What does an INS calculate on power up?
- Last Known Longitude
- Last Known Latitude
- Last Known Longitude and Latitude
INS or IRS has to do with both lat and long....'??
The VSWR of a VHF system with a forward power of 100W and a reflected power of 4W will be
- 1.5:1
- 2:1
- 2.5:1
how to solve...???
What is the power supply to cabin flow tubes?
- 115v ac
- 200v ac
- High voltage stepped up
cabin flow tubes...??????
Paralleling in AC constant frequency is affected by
- contactors
- Generator Control Unit (GCU)
- But Tie Bar (BTB)
I fail to interpret the question...BTB has a different role to play,,,,,???/