CPD240 FINAL S/64

In straight and level flight at a constant IAS if flap is selected, it will increase the:

• (a) lift and the drag

• (b) Clmax and the drag

• (c) lift coefficient and the drag

• (d) stalling speed

After take-off in an aeroplane fitted with both slats and flaps the reason that it is customary to retract the flaps first is:

• (a) Extended flaps decrease the stalling speed by a large amount with relatively little drag.

• (b) Extended slats decrease the stalling speed by a large amount with relatively little drag and have no effect on the climb gradient.

• (c) Extended slats give the pilot a better view from the cockpit than does extended flaps.

• (d) Extended slats enable a more favourable Vmca to be used.

Extension of the Fowler-type trailing-edge flaps will produce:

• (a) a force that reduces drag

• (b) a nose-down pitching moment

• (c) no pitching moment

• (d) a nose-up pitching moment

At a constant IAS in straight and level flight, if flaps are deployed the magnitude of the tip vortices will eventually:

• (a) increase

• (b) remain the same

• (c) increase or decrease depending on the initial angle of attack

• (d) decrease

The most efficient flap system is the:

• (a) plain flap

• (b) single-slotted flap

• (c) Fowler flap

• (d) split flap

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

• (a) it changes the camber of the wing

• (b) it delays the stall to a higher angle of attack

• (c) the laminar part of the boundary layer gets thicker

• (d) it decelerates the upper surface boundary layer

Deploying a Fowler flap will cause it to:

• (a) turn down and then move aft

• (b) move aft

• (c) turn down

• (d) move aft and then turn down

Full extension of a Fowler flap will:

• (a) increase the wing area only

• (b) increase the wing area and increase the camber

• (c) increase the camber only

• (d) not affect the Cd

At a constant angle of attack, during flap retraction the aeroplane begins to:

• (a) climb

• (b) yaw

• (c) sink

• (d) bank

When trailing-edge flaps are extended:

• (a) the critical angle of attack decreases and the Clmax increases

• (b) Clmax increases and the critical angle of attack increases

• (c) Clmax increases and the critical angle of attack remains the same

• (d) Vs increases and the critical angle of attack remains constant