Stalling: DGCA Technical General questions

Question 1

A stall warning device must be set to operate:

Accepted Answer

At a speed about 5% to 10% above the stalling speed.

Answer

At the stalling speed.

Answer

At a speed just below the stalling speed.

Answer

At a speed about 20% above the stalling speed.

Question 2

High speed buffet shock stall is caused by:

Accepted Answer

The boundary layer separating immediately behind the shock wave.

Answer

The boundary layer separating in front of a shock wave at high angles of attack.

Answer

The shock wave striking the tail of the aircraft.

Answer

The shock wave striking the fuselage.

Question 3

If the angle of attack is increased above the stalling angle:

Accepted Answer

Lift will decrease and drag will increase.

Answer

Lift and drag will both decrease.

Answer

Lift will increase and drag will decrease.

Answer

Lift and drag will both increase.

Question 4

Sweepback on a wing will:

Accepted Answer

Increase the tendency to tip stall.

Answer

Reduce induced drag at low speed.

Answer

Reduce the tendency to tip stall.

Answer

Cause the stall to occur at a lower angle of attack.

Question 5

On a highly tapered wing without wing twist the stall will commence:

Accepted Answer

At the tip.

Answer

Simultaneously across the whole span.

Answer

At the centre of the span.

Answer

At the root.

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