Upon what quality or characteristic of a lubricating oil is its viscosity index based?
•  Its rate of flow through an orifice at a standard temperature.
•  Its rate of change in viscosity with temperature change.
•  Its resistance to flow at a standard temperature as compared to high grade paraffin base oil at the same temperature.

Diverdeep asking:
•  viscosity is defined as mm^2/s for a determined temperature.

Community comments: 0

Extending a leading edge slat will have what effect on the angle of attack of a wing?
•  Increase the angle of attack.
•  Decrease the angle of attack.
•  No effect on angle of attack.

Tommibona asking:
•  The effect of the slat is to prolong the lift curve by delaying the
stall until a higher angle of attack. how does it possible that the angle of attack decreases?

Community comments: 0

Calculate the area of the shape shown:

•  3pi
•  6.75pi
•  17.5pi

sakismiou asking:
•  Please write your question here.

Community comments: 0

In a flight director, how are small deviations corrected?
•  Pilot input.
•  Instrument is calibrated at fitment to remove any possible error.
•  Instrument feedback.

davide_gibbo asking:
•  Why?

Community comments: 0

The centre of gravity of an aircraft is adjusted by two weights, 10 kg and 5 ckg plaed 4m and 2 m aft of the c of g. To what position must a 20 kg weight be added to balance the c of g?
•  2.5m.
•  4m.
•  2m.

AndreaFrasconi asking:
•  Why

Community comments: 3