DHL INTERVIEW ATPL EXAM SCRIPT QUESTIONS AND
ANSWERS 2025/2026 ALL GRADED A+
✔✔why are all jet liners wings swept - ✔✔they are better at close to mach
✔✔where does the Pulmonary artery pump blood to? - ✔✔the lungs
✔✔what is reduced when someone hyper ventilates - ✔✔CO2
✔✔how long such you void flying for after giving blood? - ✔✔24 hrs
✔✔what percentages of accidents are caused by human error - ✔✔70%
✔✔What is the tropopause? - ✔✔The boundary between the troposphere and the
stratosphere.
Where temp no longer increases with height
✔✔what does the air need to be at the summit of a mountain to cause mountain waves?
- ✔✔stable
✔✔what does they wind need to be doing with increasing altitude to cause mountain
waves? - ✔✔increasing
✔✔why won't cirrus clouds cause icing - ✔✔they are already ice crystals
✔✔what side of the polar jet stream in the most turbulence on? - ✔✔the cold side
✔✔what is Grivation - ✔✔the combination of Grid convergence and magnetic variation
✔✔what is ISA? - ✔✔Temp 15
Pressure 1013.35
Density 1225
- 2 c per 1000ft
27ft per 1 Hpa
✔✔What is pressure Altitude? - ✔✔the vertical distance from ISO
✔✔how many nautical miles is one degree of latitude? - ✔✔60NM
✔✔where is the magnetic pole? - ✔✔North Canada
✔✔what cool would the magnetic pole be? - ✔✔blue
,✔✔what is the formula for rate of descent and ground speed for a 3 degree glide slope -
✔✔5 x Ground speed = Rate of Descent
✔✔what air is used to cool the air in the boot leg air conditioning system? - ✔✔Ramp air
✔✔what are the advantages of cruising at high altitudes - ✔✔faster
more efficient
above bad weather
✔✔what does the pack flow control valve - ✔✔controls the flow of bleed air in to the Air
con packs
✔✔how many heat exchangers are there is bootstrap system - ✔✔2
primary
main(secondary)
✔✔For the localiser, what frequency is on the left and right lobes - ✔✔left - 90 hz -
Yellow
right - 150 hz - Blue
✔✔for the glides slope, what is the frequency of the lobes above and below? -
✔✔above - 90hz - yellow
below - 150hz - blue
✔✔what are the colours for the outer, middle and inner marker for the ILS - ✔✔outer -
blue
middle - yellow
inner - white
✔✔how is an ILS with a DME indicated on a approach chart - ✔✔it will have a D before
the ILS frequency
✔✔what are the ranges you should be able to pick up the localiser - ✔✔25 nm - 10
degrees either side
17 Nm - 35 degrees either side
10NM - 90 either side
✔✔at what range does the glide slope have its best accuracy? - ✔✔10nm - 8 degrees
either side
✔✔how does a DME work - ✔✔the aircraft sends out a pulse and the ground station
sends it back. depending on the time to recieve it back depends on the distance - Slant
range
,✔✔What does VOR mean? - ✔✔VHF Omnidirectional Range
✔✔what range are VOR usable to? - ✔✔25 - 140 nm
✔✔what is the range of frequency for a VOR - ✔✔108- 117.9 Mhz
✔✔are VOR aligned to True North or Magnetic North? - ✔✔Magnetic
✔✔how does a VOR work - ✔✔it emits two signals
one rotating at a certain speed and one turning on and off
✔✔what is the difference between N0NA1A and N0NA2A for an NDA - ✔✔N0NA1A -
requires an BFO(beat frequency oscillation) for manual tuning, identifying and
monitoring
N0NA2A - doesn't require a BFO
✔✔what errors are NDB/ADF erected by - ✔✔Static Interference
Night effect
Station Interference
Costal Refraction
Multi Path Propagation
Quadrantal Effect
✔✔how do NDB Waves propagate? - ✔✔Surface waves
✔✔why are skywaves caused at night - ✔✔because at night the lower levels of the
ionosphere disappears
the ionosphere absorbs the radio waves in the day so it doesn't bounce back down to
earth
✔✔What effect causes a ADF needle to hunt? - ✔✔Night effect
✔✔what is a QDM? - ✔✔magnetic bearing TO the station
✔✔what is a QDR? - ✔✔Magnetic bearing FROM the station
✔✔what is a QUJ? - ✔✔True bearing TO a station
✔✔what is a QTE? - ✔✔True track FROM a station.
✔✔what is the memory add for variation - ✔✔Variation west, magnetic best
True + Variation = magnetic heading
Variation east magnetic least
True - variation = magnetic heading
, ✔✔what frequency range does a MLS system work in? - ✔✔5031 - 5090 Mhz
✔✔what is the SSR code for unlawful interference? - ✔✔7500
✔✔what is the SSR code for radio failure - ✔✔7600
✔✔what is the SSR code for Emergency - ✔✔7700
✔✔What does SSR stand for? - ✔✔Secondary Surveillance Radar
✔✔what range and angle is a MLS accurate for? - ✔✔20NM - 40 degrees either side
✔✔what is the difference between primary and secondary radar? - ✔✔Primary sends
out a pulse frequency and receives the same frequency back
Secondary send out a pulse frequency but receives back a different frequency.
✔✔what is a CW radar? - ✔✔an continues wave radar
✔✔what is a radar PRF? - ✔✔Pulse repetition Frequency
the amount of pulses per minute
✔✔what the determines the max range of a radar - ✔✔the PRF
the lower the PRF the further the range, as the radar as the pulse will take longer to
return
✔✔what is the frequency for a AWR(airborne weather radar) - ✔✔9375GHz - its
optimised for the size of water droplets or hail
✔✔what are the limits of CAT 1,2,3A,3B,3C for ILS - ✔✔Cat 1 - DH 200ft or above
- RVR - 550 m or above
Cat 2 - DH - 200ft - 100ft
- RVR - 300m or above
Cat 3A - DH - 0 - 100 ft
- RVR - 200 m or above
Cat 3B - DH 0 - 50 ft
- RVR - 75 - 200m
Cat 3C - No limitations
✔✔with a SSR - what is the interrogation frequency? and what is the reply frequency? -
✔✔interrogation - 1030
Reply - 1090
ANSWERS 2025/2026 ALL GRADED A+
✔✔why are all jet liners wings swept - ✔✔they are better at close to mach
✔✔where does the Pulmonary artery pump blood to? - ✔✔the lungs
✔✔what is reduced when someone hyper ventilates - ✔✔CO2
✔✔how long such you void flying for after giving blood? - ✔✔24 hrs
✔✔what percentages of accidents are caused by human error - ✔✔70%
✔✔What is the tropopause? - ✔✔The boundary between the troposphere and the
stratosphere.
Where temp no longer increases with height
✔✔what does the air need to be at the summit of a mountain to cause mountain waves?
- ✔✔stable
✔✔what does they wind need to be doing with increasing altitude to cause mountain
waves? - ✔✔increasing
✔✔why won't cirrus clouds cause icing - ✔✔they are already ice crystals
✔✔what side of the polar jet stream in the most turbulence on? - ✔✔the cold side
✔✔what is Grivation - ✔✔the combination of Grid convergence and magnetic variation
✔✔what is ISA? - ✔✔Temp 15
Pressure 1013.35
Density 1225
- 2 c per 1000ft
27ft per 1 Hpa
✔✔What is pressure Altitude? - ✔✔the vertical distance from ISO
✔✔how many nautical miles is one degree of latitude? - ✔✔60NM
✔✔where is the magnetic pole? - ✔✔North Canada
✔✔what cool would the magnetic pole be? - ✔✔blue
,✔✔what is the formula for rate of descent and ground speed for a 3 degree glide slope -
✔✔5 x Ground speed = Rate of Descent
✔✔what air is used to cool the air in the boot leg air conditioning system? - ✔✔Ramp air
✔✔what are the advantages of cruising at high altitudes - ✔✔faster
more efficient
above bad weather
✔✔what does the pack flow control valve - ✔✔controls the flow of bleed air in to the Air
con packs
✔✔how many heat exchangers are there is bootstrap system - ✔✔2
primary
main(secondary)
✔✔For the localiser, what frequency is on the left and right lobes - ✔✔left - 90 hz -
Yellow
right - 150 hz - Blue
✔✔for the glides slope, what is the frequency of the lobes above and below? -
✔✔above - 90hz - yellow
below - 150hz - blue
✔✔what are the colours for the outer, middle and inner marker for the ILS - ✔✔outer -
blue
middle - yellow
inner - white
✔✔how is an ILS with a DME indicated on a approach chart - ✔✔it will have a D before
the ILS frequency
✔✔what are the ranges you should be able to pick up the localiser - ✔✔25 nm - 10
degrees either side
17 Nm - 35 degrees either side
10NM - 90 either side
✔✔at what range does the glide slope have its best accuracy? - ✔✔10nm - 8 degrees
either side
✔✔how does a DME work - ✔✔the aircraft sends out a pulse and the ground station
sends it back. depending on the time to recieve it back depends on the distance - Slant
range
,✔✔What does VOR mean? - ✔✔VHF Omnidirectional Range
✔✔what range are VOR usable to? - ✔✔25 - 140 nm
✔✔what is the range of frequency for a VOR - ✔✔108- 117.9 Mhz
✔✔are VOR aligned to True North or Magnetic North? - ✔✔Magnetic
✔✔how does a VOR work - ✔✔it emits two signals
one rotating at a certain speed and one turning on and off
✔✔what is the difference between N0NA1A and N0NA2A for an NDA - ✔✔N0NA1A -
requires an BFO(beat frequency oscillation) for manual tuning, identifying and
monitoring
N0NA2A - doesn't require a BFO
✔✔what errors are NDB/ADF erected by - ✔✔Static Interference
Night effect
Station Interference
Costal Refraction
Multi Path Propagation
Quadrantal Effect
✔✔how do NDB Waves propagate? - ✔✔Surface waves
✔✔why are skywaves caused at night - ✔✔because at night the lower levels of the
ionosphere disappears
the ionosphere absorbs the radio waves in the day so it doesn't bounce back down to
earth
✔✔What effect causes a ADF needle to hunt? - ✔✔Night effect
✔✔what is a QDM? - ✔✔magnetic bearing TO the station
✔✔what is a QDR? - ✔✔Magnetic bearing FROM the station
✔✔what is a QUJ? - ✔✔True bearing TO a station
✔✔what is a QTE? - ✔✔True track FROM a station.
✔✔what is the memory add for variation - ✔✔Variation west, magnetic best
True + Variation = magnetic heading
Variation east magnetic least
True - variation = magnetic heading
, ✔✔what frequency range does a MLS system work in? - ✔✔5031 - 5090 Mhz
✔✔what is the SSR code for unlawful interference? - ✔✔7500
✔✔what is the SSR code for radio failure - ✔✔7600
✔✔what is the SSR code for Emergency - ✔✔7700
✔✔What does SSR stand for? - ✔✔Secondary Surveillance Radar
✔✔what range and angle is a MLS accurate for? - ✔✔20NM - 40 degrees either side
✔✔what is the difference between primary and secondary radar? - ✔✔Primary sends
out a pulse frequency and receives the same frequency back
Secondary send out a pulse frequency but receives back a different frequency.
✔✔what is a CW radar? - ✔✔an continues wave radar
✔✔what is a radar PRF? - ✔✔Pulse repetition Frequency
the amount of pulses per minute
✔✔what the determines the max range of a radar - ✔✔the PRF
the lower the PRF the further the range, as the radar as the pulse will take longer to
return
✔✔what is the frequency for a AWR(airborne weather radar) - ✔✔9375GHz - its
optimised for the size of water droplets or hail
✔✔what are the limits of CAT 1,2,3A,3B,3C for ILS - ✔✔Cat 1 - DH 200ft or above
- RVR - 550 m or above
Cat 2 - DH - 200ft - 100ft
- RVR - 300m or above
Cat 3A - DH - 0 - 100 ft
- RVR - 200 m or above
Cat 3B - DH 0 - 50 ft
- RVR - 75 - 200m
Cat 3C - No limitations
✔✔with a SSR - what is the interrogation frequency? and what is the reply frequency? -
✔✔interrogation - 1030
Reply - 1090
