13. Aircraft aerodynamics, structures and systems - Q&A

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

GPS has

• 6 satellites in 4 orbits
• 4 satellites in 6 orbits
• 7 satellites in 3 orbits

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

The electrical A/H has a movement of

• 85 degree in pitch and roll
• 360 in roll and 110 in pitch
• 360 in roll and 85 in pitch

In a dual FMS, a failure of one computer will result in

• COMPLETELY blank display on one CDU
• down-grade of the landing category
• no effect on the CDU

Aircraft is 9000 ft. When is it out of VHF range

• 100 nm
• 120 nm
• 140 nm

In ADF system, Goniometer

• combines the signals from fixed loop antenna and sense antenna
• effectively simulates a rotating loop antenna
• alternately selects signals from loop antenna and sense antenna

Paralleling in AC constant frequency is affected by

• contactors
• Generator Control Unit (GCU)
• But Tie Bar (BTB)

The maximum azimuth coverage by a MLS facility is

• +/- 35 degrees
• +/-40 degrees
• +/-60 degrees

Versine signal is governed by

• roll
• pitch
• yaw

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

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

Automatic trim is used to

• maintain level flight
• prevents standing loads on the elevator
• allow full authority to be regained by the aileron

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

A GNS satellite system transmis

• vertically polarise
• horizontally polarise
• right hand circular

To improve the image or picture when using the WRX (weather radar receiver)

• scan at a lower rate
• use shorter bursts
• use longer bursts

Other than spoilers, where are speed brakes located?

• On the wing
• Under the Fuselage
• Either side of the Fuselage

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

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

A triplex system looses one channel, the system is now,

• fail passive
• fail operational
• fail redundant

An auto land system displays Land 2 another failure will make the system

• operational
• passive
• simplex

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

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)

The length of a resonant antenna dipole is

• lambda
• lambda/2
• lambda/4

The frequency spectrum of noise is

• infinitely wide
• restricted to the audio band
• restricted to the HF band