POF Q16 - Lift Augmentation

Question 1

On a wing fitted with a ‘Fowler’ type trailing edge flap, the ‘Full extended’ position will produce:
Select one:

a.an increase in wing area and camber

b.an unaffected CD, at a given angle of attack

c.an unaffected wing area and increase in camber

d.an increase in wing area only

Answer 1

a.an increase in wing area and camber

Question 2

What is the most effective flap system?
Select one:

a.Plain flap

b.Single slotted flap

c.Fowler flap

d.Split flap

Answer 2

c.Fowler flap

Question 3

Deploying a Fowler flap, the flap will:
Select one:

a.just move aft

b.move aft, then turn down

c.just turn down

d.turn down, then move aft

Answer 3

b.move aft, then turn down

Question 4

Extension of FOWLER type trailing edge lift augmentation devices, will produce:
Select one:

a.no pitching moment

b.a force which reduces drag

c.a nose-down pitching moment

d.a nose-up pitching moment

Answer 4

d.a nose-up pitching moment

Question 5

When flaps are deployed at constant angle of attack the lift coefficient will:
Select one:

a.vary as the square of IAS

b.decrease

c.remain the same

d.increase

Answer 5

d.increase

Question 6

Trailing edge flap extension will:
Select one:

a.increase the critical angle of attack and decrease the value of CLmax

b.increase the critical angle of attack and increase the value of CLmax

c.decrease the critical angle of attack and increase the value of CLmax

d.decrease the critical angle of attack and decrease the value of CLmax

Answer 6

c.decrease the critical angle of attack and increase the value of CLmax

Question 7

In order to maintain straight and level flight at a constant airspeed, whilst the flaps are being retracted, the angle of attack must be:

Select one

a.decreased

b.held constant

c.increased or decreased depending upon the type of flap

d.increased

Answer 7

d.increased

Question 8

Flap selection at constant IAS whilst maintaining straight and level flight will increase the:
Select one

a.lift and the drag

b.stall speed

c.maximum lift coefficient (CLmax) and the drag

d.lift coefficient and the drag

Answer 8

c.maximum lift coefficient (CLmax) and the drag

Question 9

The trailing edge flaps when extended:
Select one

a.increase the zero lift angle of attack

b.significantly lower the drag

c.significantly increase the angle of attack for maximum lift

d.degrade the best angle of glide

Answer 9

d.degrade the best angle of glide

Question 10

Which of the following statements about the difference between Krueger flaps and slats is correct?
Select one:

a.Deploying a Krueger flap will increase critical angle of attack, deploying a slat does not

b.Deploying a Krueger flap will form a slot, deploying a slat does not

c.Deploying a slat will increase critical angle of attack, deploying a Krueger flap does not

d.Deploying a slat will form a slot, deploying a Krueger flap does not

Answer 10

d.Deploying a slat will form a slot, deploying a Krueger flap does not

Question 11

Deflection of leading edge flaps will:
Select one

a.not affect critical angle of attack

b.increase critical angle of attack

c.decrease drag

d.decrease Clmax

Answer 11

b.increase critical angle of attack

Question 12

Slat extension will:
Select one

a.create gaps between leading edge and engine nacelles

b.decrease the energy in the boundary layer on the upper side of the wing

c.reduce tip vortices

d.increase the critical angle of attack

Answer 12

d.increase the critical angle of attack

Question 13

The use of a slot in the leading edge of the wing enables the aeroplane to fly at a slower speed because:
Select one

a.it changes the camber of the wing

b.it delays the stall to a higher angle of attack

c.it decelerates the upper surface boundary layer air

d.the laminar part of the boundary layer gets thicker

Answer 13

b.it delays the stall to a higher angle of attack

Question 14

What is the purpose of an auto-slat system?
Select one:

a.provide automatically slat IN selection after take-off

b.ensures that the slats are always extended when the ground/flight system is in the ‘ground’ position

c.extend automatically when a certain value of angle of attack is exceeded

d.assist the ailerons during rolling

Answer 14

c.extend automatically when a certain value of angle of attack is exceeded

Question 15

If an aircraft on approach selects a higher flap setting, the strength of the wingtip vortices will
Select one:

a.remain the same

b.increase

c.increase or decrease, depending on the initial angle of attack

d.decrease

Answer 15

d.decrease