1 / 20
With reference to the annex determine the N1 and TAS at a cruise altitude of FL340 and a mass of 55 000kg. M 0.78 AC ON normal. Engine and wing anti-ice OFF.
  • A
    84.8% N1. TAS 452 kts.
  • B
    84.8% N1. TAS 450 kts.
  • C
    84.9% N1. TAS 452 kts
  • D
    84.6% N1. TAS 452 kts.
Refer to figure.
The table does not show values for 55 000 kg at FL340, therefore, interpolation is necessary:
  • 54 000 kg at FL330: 84.6 % and 454 kt TAS
    54 000 kg at FL350: 84.8 % and 450 kt TAS
  • 56 000 kg at FL330: 84.9 % and 454 kt TAS
    56 000 kg at FL350: 85.2 % and 450 kt TAS
To find the result for 55 000 kg at FL340, we must sum the above values and divide by 4:
(84.6 % + 84.8 % + 84.9 % + 85.2 %) / 4 = 84.875 % (84.9 %) N1
(454 kt + 450 kt + 454 kt + 450 kt) / 4 = 452 kt TAS

Your Notes (not visible to others)



This question has appeared on the real examination, you can find the related countries below.

  • United Kingdom
    4
  • Hong Kong
    1
  • Poland
    1
Keyboard Shortcut Use Keyboard Shortcuts