Q1. ** If the temperature decreases when flying at constant CAS at FL 200, the TAS will…… and the true Mach number will……?
Decreases; Constant
Constant CAS , density increasing – TAS decreases.
Constant CAS and FL = Machmeter Constant.
Q2. When descending through an inversion at constant TAS?
Correct answer is – “Mach number increases.”
Q3. *** What happens to mach meter indication in a constant RAS climb?
Correct answer is – “Increases.”
Q4. When descending through an isothermal layer at constant TAS?
Correct answer is – “Mach number remains constant.”
Q5. When climbing through an inversion at a constant Mach number?
Correct answer is – “TAS increases.”
Q6. How will the Mach meter respond in a constant Mach number climb if the static source becomes blocked?
Correct answer is – “Decrease.”
Q7. The airspeed indicator of an aircraft is provided with a moving red and white hatched pointer indicates the:
Correct answer is – “Maximum speed in VMO operation versus altitude.”
Q8. At FL350 with a ISA deviation of -12, the true airspeed when flying at M 0.78 is:
Correct answer is – “436 kt”
Q9. How will mach meter indication vary in a constant CAS climb?
Correct answer is – “Increase.”
Q10. Cruising at FL390, M 0.84 is found to give a TAS of 499 kt. The ISA deviation at this level will be:
Correct answer is – “+17”
Q11. A mach meter comprises of?
Correct answer is – “A combination of ASI and altimeter.”
Q12. **** What would happen if the static pipe became detached from the back of a Mach meter in a pressurized aircraft at a high altitude?
Correct answer is – “Under read.”
Q13. When climbing through an isothermal layer at constant CAS?
Correct answer is – “Mach number increases.”
Q14. When climbing at constant mach number below the tropopause in the ISA, the CAS will?
Correct answer is – “Decrease.”
Q15. ** If the static source becomes blocked the mach meter will …… as an aircraft climbs?
Correct answer is – “Under indicate.”
Q16. When descending at constant CAS, the TAT and Mach meter indications should?
Increase; decrease.
Descending
TAT – total air temperature increases.
Mach No – Decreases while descending with constant CAS.
Q17. # When descending below the tropopause under normal conditions (increasing temperature) at a constant CAS:
Correct answer is – “both TAS and mach number will decrease”
Q18. * If an aircraft is climbed with a constant mach meter indication in the ISA, How should the ASI indication respond?
Correct answer is – “Decrease.”
Q19. How will mach meter indication respond if an aircraft is flying at constant CAS at FL270 when it experiences a reduction in OAT?
Correct answer is – “No change.”
Q20. The airspeed indicator of a twin-engine aircraft comprises different sectors and colour marks. The blue line corresponds to the:
Correct answer is – “optimum climbing speed with one engine inoperative, or VYSE.”
Q21. How will Mach meter indication respond if an aircraft passes through a cold front when flying at constant CAS and altitude?
Correct answer is – “Remain constant.”
Q22. *** An aircraft climbs at constant CAS from FL 200 to FL 400 the Mach meter indication will?
Correct answer is – “Increase.”
Q23. When descending at constant CAS, if the temperature remains constant the indicated mach number will?
Correct answer is – “Decrease.”
Q24. When climbing through an inversion at constant CAS?
Correct answer is – “TAS increases.”
Q25. When descending through an inversion at constant CAS?
Correct answer is – “TAS decreases.”
Q26. The velocity maximum operating (VMO) is a speed expressed in:
Correct answer is – “Calibrated airspeed (CAS).”
Q27. How will CAS respond if temperature increases by 5 degrees C. when flying at a constant indicated Mach number at FL290?
Correct answer is – “Remains approximately constant.”
Q28. When descending through an isothermal layer at a constant Mach number?
Correct answer is – “TAS remains constant.”
Q29. When descending through an isothermal layer at constant CAS?
Correct answer is – “TAS decreases.”
Q30. An aircraft is flying at FL350 with a ISA deviation of +8. The Mach No. is 0.83 and the TAS 485. If the aircraft descends to FL300 and maintains the same Mach No. and TAS, the ISA deviation will now be:
Correct answer is – “-2”
Q31. When descending through an isothermal layer at constant CAS?
Correct answer is – “LSS remains constant.”
Q32. When climbing at a constant Mach number below the tropopause, in ISA conditions, the Calibrated Airspeed (CAS) will:
Correct answer is – “Decrease.”
Q33. *** An airplane is in a steady descent. The auto-throttle maintains a constant Mach number. If the total temperature remains constant, the calibrated airspeed:
Correct answer is – “Increases.”
Q34. When descending through an inversion at constant mach number?
Correct answer is – “TAS decreases.”
Q35. ## What happens to TAT when an aircraft starts descending at constant indicated Mach number from tropopause?
Correct answer is – “Remains constant then increases.”
Q36. During a straight and uniform climb, the pitot maintains a constant calibrated airspeed (CAS):
Correct answer is – “The Mach number increases and the true airspeed (TAS) increases.”
Q37. The errors to which the Machmeter is subject are:
Correct answer is – “instrument error, position error and manoeuvre induced error”
Q38. What will happen to TAS when descending through an isothermal layer at constant CAS?
Correct answer is – “Decrease.”
Q39. ### Considering the maximum operational Mach number (MMO) and the maximum operational speed (VMO), and the maximum operational speed (VMO), the captain of a pressurized aircraft begins descent from a high flight level. In order to meet his scheduled time of arrival, he decides to use the maximum ground speed at any time of the descent. He will be limited:
Correct answer is – “Initially by the MMO, then by the VMO below a certain flight level.”
Q40. The indications on a mach meter are independent of?
Correct answer is – “Ambient temperature.”