19. Stalling and spinning (Stalling)

Question 1

Stalling occurs at high angles of attack when the airflow around the aerofoil is unable to remain streamlined, separates from most of the upper surface and becomes ……..

Answer 1

turbulent.

Question 2

You can induce a stall intentionally by applying (forward / back) pressure on the control column to (increase / decrease) the angle of attack.

Answer 2

back; increase

Question 3

You can recover from a stall by (relaxing / increasing) the back pressure on the control column to (increase / decrease) the angle of attack.

Answer 3

relaxing; decrease

Question 4

Recovering from a stall requires you to:

a. increase lift.
b. increase power.
c. increase drag.
d. reduce the angle of attack.

Answer 4

d.

Question 5

Beyond the stalling angle, the centre of pressure for the diminished lift force moves (rearward / forward) allowing the nose to drop.

Answer 5

rearward.

Question 6

If the wings stall, the turbulent airflow over the horizontal stabiliser may cause control ……..

Answer 6

buffeting

Question 7

A typical light training aircraft will stall when the wings are at about (0 / 4 / 16) degrees of attack.

Answer 7

16

Question 8

Stalling is associated with a particular …….. …….. ……..

Answer 8

angle of attack.

Question 9

If the lift required from the wings increases due to the pilot banking the aircraft and applying back pressure on the control column to maintain altitude, then the stalling speed compared with that in straight-and-level flight will (increase / stay the same / decrease).

Answer 9

increase.

Question 10

In a banked turn at a constant altitude, the load factor is (increased / decreased / equal to 1).

Answer 10

increased.

Question 11

The steeper the turn the (greater / smaller) the load factor.

Answer 11

greater.

Question 12

The steeper the turn the (higher / lower) the stalling speed.

Answer 12

higher.

Question 13

Stalling speed (increases / decreases / remains unaltered) with an increase in bank angle.

Answer 13

increases.

Question 14

Pulling out of a fast and steep dive, the load factor (is increased / is decreased / remains the same as in smooth , straight-and-level flight).

Answer 14

is increased.

Question 15

Pulling out of a fast and steep dive, the stalling speed (is increased / is decreased / remains the same as straight-and-level)

Answer 15

is increased.

Question 16

Stalling occurs at the critical …….. ……… …….. for an aerofoil.

Answer 16

angle of attack.

Question 17

The stalling IAS (varies / does not vary) with altitude.

Answer 17

does not vary.

Question 18

Flaps (lower / increase) the stall speed.

Answer 18

lower.

Question 19

The wings of an aircraft can be stalled:

a. only when the nose is high and the airspeed is low.
b. at any airspeed and in any flight attitude, provided that the critical angle of attack is reached.

Answer 19

b.

Question 20

Increasing the load factor (increases / decreases / does not affect) the stalling angle of attack.

Answer 20

does not affect.

Question 21

Increasing the load factor (increases / decreases / does not affect) the stalling speed.

Answer 21

increases.

Question 22

As bank angle is increased, the stalling speed (increases / decreases / stays the same) and the stalling angle of attack (increases / decreases / stays the same).

Answer 22

increases; stays the same.

Question 23

Turbulent air can cause an increase in stall speed by causing:

a. abrupt increases in the angle of attack and load factor.
b. abrupt decreases in the angle of attack and load factor.
c. abrupt increases in weight.
d. abrupt increases in indicated airspeed.

Answer 23

a.

Question 24

If one wing drops as the aircraft stalls, attempting to ‘pick it up; with aileron can:

a. take the angle of attack of the dropped wing further beyond the stalling angle.
b. stall the up-going wing by increasing its angle of attack beyond the stalling angle.

Answer 24

a.

Question 25

If an aircraft approaches the stalling angle with power on, the thrust vector has a component that acts in the same direction as the lift from the wings. The stalling speed power on is therefore (less than / the same as / greater than) the power-off stalling speed.

Answer 25

less than.