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370 Multiple Choice Antworten
What is it a pressure altitude above the airport level?
A reading of a pressure altimeter which is set to an airport pressure QFE.
A reading of a pressure altimeter which is set to sea level pressure QNH.
A reading of a radio altimeter.
The airport elevation.
What is pressure altitude above sea level?
A reading of a pressure altimeter when it is set to the current sea level pressure QNH.
The airport elevation.
A reading of a pressure altimeter when it is set to the current airport pressure QFE.
A reading of a radio altimeter.
What is density altitude?
Theoretical height, where the air density is equal to the standard density according to ISA.
The height according to international standard atmosphere (ISA).
The airport elevation height corrected for the current air density.
The pressure altitude corrected for humidity.
What is the standard height?
A reading of a pressure altimeter when it is set to the standard value at sea level (QNH) this is 1013.25 hPa or 760 mm Hg.
A reading of a standard radio altimeter.
The airport elevation.
Density altitude, corrected for ambient temperature.
Is there any connection between air static pressure (p), the absolute temperature (T) and density (rho)? Czy między ciśnieniem statycznym powietrza p, jego temperaturą bezwzględną T i gęstością rho; istnieje jakiś związek?
Yes, expressed as the Universal Gas Law p=rho*g*R*T [Pa], where g is the gravity constant g = 9.81 m/s2 and gas constant R = 29.2746 m/K.
Yes, expressed in Mallets Law p=R*g*rho*dT [Pa], where g is the gravity constant g = 9.81 m/s2 and air gas constant R = 29.2746 m/K.
Yes, expressed as a Crakow's form f [A, g, p, rho, T]
There is no connection
Does the object (aircraft, helicopter, glider, hang-glider, etc.) statically unstable can be dynamically stable?
No.
Yes.
Static stability is not important for the dynamic stability.
Fixed-wing aircraft - yes, Rotorcraft - no.
Does increase of stability affect controlability?
Yes, controlability decreases.
Yes, controlability increses.
No, changes of stability do not affect controlability.
Yes, at large angles of attack the controlability increases and at small decreases.
What is the difference between static stability and dynamic stability of an object (airplane, helicopter, glider, hang-glider etc.)?
The static stability takes into account only tendency to return to the equilibrium state, the dynamic stability takes into account objects's movement type.
There is no difference, the phenomenon is the same, just different names.
They differ in the importance - dynamic stability is more important.
The static stability concerns only balance on the ground, the dynamic stability - in-flight balance.
