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The pilot of an aircraft has calculated a 4000 m service ceiling, based on the forecast general conditions for the flight and a take-off mass of 3250 kg. If the take-off mass is 3000 kg, the service ceiling will be:
  • A
    only a new performance analysis will determine if the service ceiling is higher or lower than 4000 m.
  • B
    unchanged, equal to 4000 m.
  • C
    higher than 4000 m.
  • D
    less than 4000 m.

Refer to figure.
Considering question; there is no limitation ( Planned take off mass is lower than actual take of mass )for gaining more altitude above service ceiling.

Absolute ceiling: is the altitude at which the rate of climb theoretically is zero.

Service ceiling: the altitude where the rate of climb reduces to 100 ft/min.

Aerodynamic ceiling: is the altitude at which the speeds for low speed buffet and for high speed
buffet are the same.

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