COMMERCIAL PILOT single engine add-on oral questions and answers with solutions 2024/25
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Course
Commercial pilot
Institution
Commercial Pilot
What is density altitude? - ANSWER Pressure altitude corrected for non-standard temperature. Also a good indicator of aircraft performance.
What mainly affects density altitude? - ANSWER ↑ Temperature (less dense air)
↑ Altitude (less dense air)
↑ Humidity (air holds more water = less po...
COMMERCIAL PILOT single engine add-
on oral questions and answers with
solutions 2024/25
What is density altitude? - ANSWER Pressure altitude corrected for non-standard temperature. Also a
good indicator of aircraft performance.
What mainly affects density altitude? - ANSWER ↑ Temperature (less dense air)
↑ Altitude (less dense air)
↑ Humidity (air holds more water = less power)
How to calculate Density Altitude - ANSWER DA = PA + [ 120 x (OAT - ISA) ]
What 3 things does density altitude affect on the airplane? - ANSWER 1. Engine (less power)
2. Prop (less thrust)
3. Wings (less lift)
What is TAS? - ANSWER True airspeed is CAS corrected for non-standard temperature. The actual speed
through a mass of air.
Why does TAS increase with altitude? - ANSWER TAS increases at a rate of approximately 2% per 1000ft
altitude increase because thinner air reduces drag. So, the same thrust has less opposing it, and the
result is higher forward speed.
What is IAS? - ANSWER Indicated Air Speed - given by airspeed on PFD
What is CAS? - ANSWER Calibrated Airspeed = Indicated airspeed corrected for position and installation
error
What is Groundspeed? - ANSWER The actual speed of the airplane over the ground. TAS corrected for
winds.
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