11. Aeroplane aerodynamics, structures and systems - Q&A

Ailerons control the aircraft in the

• longitudinal plane.
• lateral plane.
• directional plane.

Stalling speed in a 15 degrees bank level turn is 60kt. The stalling speed in a 45 degrees bank level turn will be

• 70 kts.
• 60 kts.
• 50 kts.

If a redundant structure fails it becomes

• fatigued
• safe-life
• failsafe

The type of fluid in an oleo strut will depend upon

• the type of seal material.
• heat generated in operation of the system.
• type of fluid most readily available.

The following factors increase stall speed:

• A higher weight, selecting a higher flap setting, a forward c.g. shift.
• An increase in load factor, a forward c.g. shift, decrease in thrust.
• A lower weight, decreasing bank angle, a smaller flap setting.

When an aircraft is heading due north (magnetic) towards a VOR station the reference and variable signals will be

• 270 degrees out of phase.
• in phase.
• 180 degrees out of phase.

An increase in aspect ratio will

• cause VbaseMD to be increased.
• cause induced drag to increase.
• cause VbaseMD to be reduced.

112.1 MHz is what frequency?

• UHF
• ILS
• VOR

How are passenger reading lights normally tested?

• By using a READ LIGHT TEST switch on the cabin attendant panel.
• Each one is switched on individually at passenger panel.
• By using a READ LIGHT TEST switch at any passenger panel.

112.1 MHz is what frequency?

• UHF
• ILS
• VOR

Inwards relief valves usually open at a negative differential pressure not exceeding

• 0.16 p.s.i.
• 1.2 p.s.i.
• 0.5 p.s.i.

When aligning an aircraft for a compass swing, the maximum allowable error is

• 1 degrees.
• 3 degrees.
• 5 degrees.

In a Turn and Slip indicator, the effect of increasing the rotor speed would be

• it would have no effect.
• it would under read.
• it would over read.

111.2 MHz is

• VHF.
• VOR.
• ILS.

If an accumulator loses air pressure there will be

• rapid fluctuations of instruments.
• rapid depressurisation of system.
• pump cavitation.

Buckling in a semi-monocoque structure is prevented by

• bulkheads.
• stringers.
• longerons.

As fuel level increases, system capacitance

• no change.
• decreases.
• increases.

A cockpit check on the engine firewire system is a

• continuity check.
• calibration check.
• function check.

Upper surface wing skin is usually made from

• 2024.
• 7075.
• 5056.

The equalizing coils on voltage regulators will

• have current passing through them from the higher loaded generator to the lower.
• have current passing through them only when the generators are not paralleled.
• be connected to each other when the generators are paralleled.

In typical vapour cycle system, the sub-cooler

• cools the vapour further to prevent slugging.
• is a heat exchanger to superheat the vapour.
• delivers extra cooling effect when the aircraft is on ground.

Floor proximity lighting is a mandatory requirement and each light should be spaced

• at 70 inch intervals.
• at 60 inch intervals.
• at 40 inch intervals.

What external warning is there for an APU fire?

• Aural.
• Red light.
• Both aural and a red light.

To ensure that a wing stalls at the root first, stall wedges are

• installed on the wing leading edge at the wing tip.
• installed on the wing leading edge at the wing root.
• installed at the wing trailing edge at the wing root.

During flap down selection in a continuous straight and level flight at constant IAS and weight

• the lift coefficient and the drag coefficient increase.
• the stall speed increases.
• the centre of pressure moves aft, lift coefficient and the drag coefficient increase.