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

The ATC aerial has a polar diagram which is

• directional
• omni-dirrectional
• limacon shaped

Stall warning will be given at speeds

• that are higher than stall speed
• that are lower than stall speed
• at the actual stall speed

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

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

Cat 2 RVR if the alert height is 100 feet will be

• 300 m
• 400 m
• 800 m

When installing multiple batteries on aircraft they are connected in

• parallel
• series
• either parallel or series and switched between as an option

T.C.A.S transmits squitter pulses on a frequency of

• 1060 MHz
• 1030 MHz
• 1090MHz

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

Bandwidth of HF transmission is

• 1 khz
• 1.5 khz
• 3 khz

What is the power supply to cabin flow tubes?

• 115v ac
• 200v ac
• High voltage stepped up

If on a lead-acid battery, several cell checks of SG read consistently low. Battery needs

• topping up with distilled water
• replacing
• recharging

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

The versine signal is used in the

• pitch channel only
• roll channel only
• pitch and roll channel

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

The instrument supplied with pitot and is affected by altitude is a

• ASI
• VSI
• Mach Meter

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

on power up, the IRS obtains position

• latitude from previous position
• longitude from previous position
• latitude and longitude from previous position

An aircraft is on course on an ILS Localiser. What is the depth of modulation?

• zero
• 20%
• 50%

A typical emergency locator transmitter (ELT)

• receives 2 frequencies
• transmit 3 frequencies
• transmits 2 frequencies

Man made noise

• mainly above 12mhz
• only in the LF band
• mainly below 12 mhz

What is the time between the F2 framing pulse and the SPI?

• 1.45 ms
• 2 ms
• 4.35 ms

on power up, the IRS obtains position

• latitude from previous position
• longitude from previous position
• latitude and longitude from previous position

In aileron control

• the up going aileron moves further than down going aileron
• the down going aileron moves further than up going aileron
• it is assisted by the rudder

The length of a resonant antenna dipole is

• lambda
• lambda/2
• lambda/4

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