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5_POF EXAM PREP

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5_POF EXAM PREP

Question 1 of 66

1

270 Winglets? (Fig. 8)

Select one of the following:

  • O Do not significantly affect lateral and directional stability.

  • O Improve lateral and directional stability.

  • O Improve spin recovery.

  • O Improve roll rates.

Explanation

Question 2 of 66

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271 How would forward movement of C of G affect manoeuvre stability?

Select one of the following:

  • O Increase.

  • O Decrease in every phase of flight.

  • O Increases or decreases pending on weight.

  • O None of them.

Explanation

Question 3 of 66

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272 What would be the effect of increasing camber?

Select one of the following:

  • O Longitudinal stability would be unaffected.

  • O CL would decrease;

  • O Angle of attack would increase.

  • O Angle of incidence will be iprooved..

Explanation

Question 4 of 66

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273 How does anhedral affect stability?

Select one of the following:

  • O Decreases lateral stability,

  • O Increases directional stability,

  • O Decreases longitudinal stability.

  • O Makes difficult to steer on the ground.

Explanation

Question 5 of 66

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274 Given the following data for C-182.
Vs CLEAN CAS 56 kts
Determine the stall speed with flaps retracted, at 60 degrees and 70 degrees respectively. Use graph. Fig. 3

Select one of the following:

  • O 79 kts 97 kts

  • O 85 kts 104 kts

  • O 56 kts 64 kts

  • O 62 kts 70 kts

Explanation

Question 6 of 66

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275 Α wing with washout would have…………………………………?

Select one of the following:

  • O the tip incidence less than the root incidence.

  • O the tip incidence greater than the root incidence.

  • O the tip camber less than the root camber.

  • O the tip chord less than the root chord.

Explanation

Question 7 of 66

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276 The stalling speed of an aeroplane is mostly affected by……………………………………..……?

Select one of the following:

  • O variations in aeroplane΄s loading.

  • O variations in flight altitude.

  • O Changes in pitch attitude.

  • O Changes with atmospheric pressure.

Explanation

Question 8 of 66

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277 A stall warning device must be set to operate:

Select one of the following:

  • O at speed 5% to 10% above the stalling speed.

  • O at the stalling speed.

  • O at a speed more than 15%, above the stalling speed.

  • O at speed bellow the stalling speed.

Explanation

Question 9 of 66

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278 Frost covering the upper surface of an aeroplane wing, will usually cause:

Select one of the following:

  • O The aeroplane to stall, at an angle of attack that is lower than normal.

  • O Drag factor, is of great importance, that sufficient speed can not be achieved during the take off.

  • O Is of no importance.

  • O The aeroplane to stall, at an angle of attack quite higher than normal.

Explanation

Question 10 of 66

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279 The following graph represents (Fig.9)

Select one of the following:

  • O The coefficient of lift to its max value of CLmax at critical angle of attack.

  • O The aerofoil induced drag in relation to angle of attack.

  • O The aerofoil lift/drag ratio.

  • O The aerofoil product in relation to bank angle.

Explanation

Question 11 of 66

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280 An aeroplane will stall at the same……………………………………………………?

Select one of the following:

  • O angle of attack regardless of altitude, with relation to the horizon.

  • O angle of attack and altitude, with relation to the horizon.

  • O airspeed regardless of the altitude, with relation to the horizon.

  • O indicated airspeed regardless of altitude, bank angle and load factor.

Explanation

Question 12 of 66

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281 (Fig. 10) Vmd occurs when……………………………………………………….?

Select one of the following:

  • O the induced and parasite drag are equal.

  • O the induced drag is greater than parasite drag.

  • O the parasite drag is greater than the induced drag.

  • O the parasite drag is greater than the induced drag

Explanation

Question 13 of 66

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282 Refer in the L/D polar diagram (Fig11……….)
Red curve represents………..(i)…………………………....
Blue curve represents……….(ii)…………………………..
Black curve represents………(iii)…………………….…

Select one of the following:

  • O (i) parasite (ii) induced (iii) total

  • O (ii) parasite (i) induced (iii) total

  • O (i) total (ii) induced (iii) parasite

  • O (i) total (ii) parasite (iii) induced

Explanation

Question 14 of 66

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283 With reference to the aircraft, total drag curve in Fig. 12:

Select one of the following:

  • O Point B is the stall speed and point A is the min drag speed

  • O Point B is the stall speed and point D is Vg

  • O Point B is the min drag speed and point D is the stall speed

  • O Point A is the VA and point C is the min power speed.

Explanation

Question 15 of 66

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284 The temperature at 11000ft AMSL is forecast to be -5°C: compared to the International Standard Atmosphere (ISA) this is;

Select one of the following:

  • O ISA +2°C.

  • O ISA -1°C.

  • O ISA -3°C.

  • O ISA +4°C.

Explanation

Question 16 of 66

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285 The International Standard Atmosphere specifies:

Select one of the following:

  • O standardised atmospheric values of temperature, pressure and density for all altitudes

  • O values of actual conditions of temperature, pressure and density that exist at all levels of the atmosphere.

  • O sea level conditions of atmospheric temperature, pressure and density.

  • O ambient conditions of atmospheric temperature, pressure and density for all altitudes.

Explanation

Question 17 of 66

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286 The variable physical properties of the atmosphere that affect aircraft performance are:

Select one of the following:

  • O temperature, pressure, density and humidity.

  • O temperature, pressure and humidity.

  • O pressure, humidity and oxygen content.

  • O pressure, humidity, temperature and specific gravity.

Explanation

Question 18 of 66

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287 The International Standard Atmosphere assumes that the ambient temperature:

Select one of the following:

  • O decreases with increase in height above the Earth.

  • O will decrease with height only if an inversion layer is present.

  • O increases with increase in height above the Earth.

  • O increases with decrease,in random maner in height above the Earth.

Explanation

Question 19 of 66

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288 Air density which is integral to airframe and engine performance, is proportional to:
.

Select one of the following:

  • O pressure, and inversely proportional to temperature.

  • O temperature, and inversely proportional to pressure

  • O humidity and temperature.

  • O pressure and temperature

Explanation

Question 20 of 66

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289 The percentage oxygen content of the atmosphere at higher altitudes compared to that at lower altitudes:
.

Select one of the following:

  • O remains constant, but the lower atmospheric pressure at altitude makes it more difficult for the body to absorb oxygen

  • O falls, but since the quantity is adequate, the fall has little effect on the pilot at any altitude.

  • O decreases due to the decreased air pressure.

  • O increases slightly up to the tropbpause above which it remains constant.

Explanation

Question 21 of 66

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290 A reduction of air pressure while humidity and temperature are maintained at constant levels will:

Select one of the following:

  • O cause the air density to decrease.

  • O not affect the air density if the temperature remains constant.

  • O cause the air density to increase.

  • O cause air density to fluctuate whilst pressure is changing due to adiabatic heating and cooling.

Explanation

Question 22 of 66

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291 The principal constituent gases that make up the Earth's atmosphere are:

Select one of the following:

  • O nitrogen, oxygen and water vapour.

  • O hydrogen, carbon dioxide, helium and oxygen.

  • O oxygen, carbon dioxide, carbon monoxide and water vapour.

  • O carbon monoxide, hydroxide nytrogen and air.

Explanation

Question 23 of 66

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292 When compared with perfectly dry air at the same temperature and pressure, very moist or saturated air will have:

Select one of the following:

  • O a lower density.

  • O a greater density.

  • O a similar density.

  • O an imbeure density.

Explanation

Question 24 of 66

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293 Air density reduces with altitude because:

Select one of the following:

  • O the pressure falls.

  • O of the fall in water vapour content.

  • O the temperature falls.

  • O of adiabatic cooling.

Explanation

Question 25 of 66

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294 -If air is maintained at a constant temperature and volume while its pressure is increased, its density will:

Select one of the following:

  • O increase.

  • O decrease.

  • O remain constant because the volume is constant.

  • O vary only with changes in the lapse rate.

Explanation

Question 26 of 66

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295 The definition of relative humidity is:

Select one of the following:

  • O the amount of water vapour present in the air compared to the maximum amount of water vapour the air could hold at
    the same temperature. This is expressed as a percentage.

  • O the percentage of water in a measured volume of air irrespective of temperature.

  • O the relative amount of water vapour in the air at any time and any temperature but specific volume.

  • O the water vapour density at any temperature compared with its density at saturation temperature.

Explanation

Question 27 of 66

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296 If air is maintained at a constant temperature and volume while its pressure is decreased, its density will:

Select one of the following:

  • O decrease.

  • O increase.

  • O remain constant because the volume is constant.

  • O remain constant because pressure will have no effect on density at a constant volume and temperature.

Explanation

Question 28 of 66

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297 The onset of a stall is characterised by:

Select one of the following:

  • O a nose pitch down and aircraft sink.

  • O a nose pitch up and aircraft sink.

  • O yaw tendency and flutter.

  • O sink and spin.

Explanation

Question 29 of 66

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298 The pressure of air flowing under a wing in straight and level flight when compared with the airflow over the wing will be:

Select one of the following:

  • O higher.

  • O lower.

  • O the same at low airspeed but higher at high airspeed.

  • O the same at low airspeed but lower at high airspeed.

Explanation

Question 30 of 66

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299 An aircraft in straight and level not accelerating flight is in equilibrium when:

Select one of the following:

  • O the weight equals lift and the drag equals the thrust.

  • O the lift equals the drag and the thrust equals the weight.

  • O the weight equals the drag and the horizontal component of lift equals the thrust.

  • O the weight equals the lift couple and the drag equals the thrust couple.

Explanation

Question 31 of 66

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300 A coefficient of lift reaches its maximum value:

Select one of the following:

  • O at or just prior to the stall.

  • O between 4° and 6° angle of attack in straight and level flight.

  • O at the minimum drag speed(Vmd) in the clear configuration.

  • O at the minimum power required (Vmp).

Explanation

Question 32 of 66

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301 The reason for 'washout' being designed into an aeroplane wing is to:

Select one of the following:

  • O cause the inboard section of the wing to stall first.

  • O equalize the angle of incidence all over the wing.

  • O cause the outboard section of the wing to stall first.

  • O prevent progressive wing stall and loss of control.

Explanation

Question 33 of 66

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302 Complete the following statement.
The……….....(i)……………...wake turbulence is generated by a............(ii)…......aircraft flying at……....(iii)….....airspeed.

Select one of the following:

  • O (i) greatest (ii) heavy (iii) slow

  • O (i)greatest (ii)light (iii)high

  • O (i)least (ii)heavy (iii)slow

  • O (i)least (ii)light (iii)moderate

Explanation

Question 34 of 66

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303 An aircraft that has been over stressed on the ground surface:

Select one of the following:

  • O must be inspected by a qualified engineer before the next flight.

  • O must be inspected by the pilot in command and if no defect is found, he will not be required to make an appropriate entry in the aircraft technical log the mechanics hold.

  • O must be inspected by at least two pilots licenced on the type, one of whom must be the pilot in command.

  • O must be subjected to a duplicate inspected by two engineers before the next flight.

Explanation

Question 35 of 66

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304 An increase in aircraft loading amongst other things will:

Select one of the following:

  • O cause an increase in the stalling speed.

  • O effect the stalling angle.

  • O cause a decrease in the stalling speed.

  • O cause an increase in the flapless stalling speed but increase in the clean stalling angle.

Explanation

Question 36 of 66

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305 I If aircraft is maintaining a constant angle of attack but increases its airspeed, this will cause:

Select one of the following:

  • O an increase of both lift and drag.

  • O a decrease in lift but an increase in drag.

  • O no change in lift generated by the wing, but an increase in airframe drag.

  • O an increase only in lift.

Explanation

Question 37 of 66

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306 The speed at which a particular aircraft stalls whilst in straight and level flight is 80kt. The approximate stalling speed of the same aircraft in a 60° bank turn would be:

Select one of the following:

  • O 112kt

  • O 102kt

  • O 100kt

  • O 119kt

Explanation

Question 38 of 66

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307 Study the picture .(Fig. 14). The total pressure entering the the pitot tube represented by the arrow is:

Select one of the following:

  • O static pressure + dynamic pressure.

  • O pitot pressure + dynamic pressure.

  • O pitot pressure + partial pressure.

  • O pitot + pressure gradient.

Explanation

Question 39 of 66

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308 An aeroplane wing will stall at a given:

Select one of the following:

  • O angle of attack

  • O angle of incidence

  • O angle of lift

  • O dihedral angle

Explanation

Question 40 of 66

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309 Study the vector diagram (Fig.13), representing the forces in a steady turn.

Select one of the following:

  • O B

  • O A

  • O C

  • O W

Explanation

Question 41 of 66

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310 A stalling angle of attack is increased by 'slots' because:
.

Select one of the following:

  • O they delay the break up of the smooth airflow over the wing.

  • O they dump positive pressure airflow from under the wing.

  • O they increase the effective wing area at the leading edge

  • O they decrease the ineffective wing area at the leading edge.

Explanation

Question 42 of 66

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311 The consequence of an aircraft with its centre of gravity positioned at or very close to its designed aft limit could be:

Select one of the following:

  • O greatly reduced applied elevator force during the flare.

  • O an increased stalling angle.

  • O an increased sense and feeling and applied elevator force during rotation.

  • O an increased sense and feeling and applied rudder force during rotation.

Explanation

Question 43 of 66

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312 As an aeroplane's True Air Speed (TAS) increases:

Select one of the following:

  • O induced drag decreases and parasite drag increases.

  • O parasite drag decreases and induced drag increases.

  • O induced drag increases and total drag decreases.

  • O induced drag decreases and parasite drag decreases.

Explanation

Question 44 of 66

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313 Induced drag:

Select one of the following:

  • O is reduced as airspeed increases.

  • O is not a factor of airspeed.

  • O is increased as airspeed increases.

  • O is reduced as angle of bank increases.

Explanation

Question 45 of 66

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314 A fixed trim tab such as those commonly found on ailerons should:

Select one of the following:

  • O be adjusted on the ground after a flight test to achieve laterally level flight.

  • O not be adjusted once set by the manufacturer.

  • O be adjusted on the ground after a test flight to achieve longitudinally level flight.

  • O only be adjusted after maintenance inspection.

Explanation

Question 46 of 66

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315 The purpose of a control surface anti-balance tab is to:

Select one of the following:

  • O ensure that the pilot's physical control load increases with increase of control surface deflection.

  • O ensure the centre of pressure is maintained forward of the hinge line.

  • O trim the tolerance of trim tab.

  • O ensure that the pilot's physical control load decreases with increase of control surface deflection.

Explanation

Question 47 of 66

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316 A flying control surface is fitted with a simple trim tab. Once the trim tab is set in flight, any movement of the flying control surface will result in the:

Select one of the following:

  • O trim tab position remaining constant relative to the control surface.

  • O trim tab moving to a new position and will have to be re-set.

  • O trim tab position remaining constant relative to the airflow.

  • O trim tab moving in the opposite direction to the main flying control surface.

Explanation

Question 48 of 66

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317 A factor that determines an aeroplane's stalling speed for a given weight at any angle is:

Select one of the following:

  • O the square root of the load factor.

  • O the square of the wing area.

  • O the square root of the weight.

  • O the square root of aspect ratio.

Explanation

Question 49 of 66

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318 The angle of attack of an aerofoil may be defined as:

Select one of the following:

  • O the angle subtended by the aerofoil chord line and the relative airflow.

  • O the angle subtended by the aerofoil chord line and the longitudinal axis.

  • O the angle subtended by the aerofoil mean chord line and the horizon.

  • O the angle subtended by the aerofoil mean chord line and the ground surface.

Explanation

Question 50 of 66

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319 In straight and level flight, the air flow over the wing's upper surface compared with the air flow unaffected by the wing will have:

Select one of the following:

  • O a greater velocity.

  • O low angular velocity.

  • O a reduced velocity.

  • O a relative conformal velocity.

Explanation

Question 51 of 66

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320 When generating the same amount of lift, the stalling angle of attack with trailing edge flaps extended, if measured between the relative airflow and the aerofoil cord line with flaps retracted, will be:

Select one of the following:

  • O less

  • O the same.

  • O greater

  • O unpredictable.

Explanation

Question 52 of 66

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321 Which of the following gives an aeroplane directional stability?

Select one of the following:

  • O The fin.

  • O The rudder.

  • O The rudder trim tab.

  • O The trim tab and anti-tab.

Explanation

Question 53 of 66

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322 The movement of an aeroplane about its normal (vertical) axis is known as:

Select one of the following:

  • O yaw.

  • O side slipping.

  • O roll.

  • O pitch.

Explanation

Question 54 of 66

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323 When an aircraft is fitted with a balance tab controlled rudder movement of the rudder bar to the right to yaw the aircraft to the right will move the balance tab to the:

Select one of the following:

  • O left and the rudder to the right.

  • O right and the rudder to the left.

  • O right and rudder to the right.

  • O left and rudder to the left.

Explanation

Question 55 of 66

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324 Control surface mass balance:
.

Select one of the following:

  • O prevents flutter of that control in the higher speed range.

  • O eases the hand movements during the power-on stall

  • O makes the control easier for the pilot to move.

  • O makes the control more difficult for the pilot to move.

Explanation

Question 56 of 66

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325 High speed flying control flutter is eliminated by fitting:

Select one of the following:

  • O mass balance forward of the control surface hinge.

  • O a special assembly to the elevator.

  • O balance tabs to the leading edge.

  • O balance tabs to the trailing edge.

Explanation

Question 57 of 66

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326 A flying control surface that is aerodynamically balanced:

Select one of the following:

  • O has an area of the control surface forward of the hinge line.

  • O has been modified with a trim tab..

  • O uses a balance weight forward of the hinge line.

  • O uses a balance weight aft of the hinge line.

Explanation

Question 58 of 66

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327 Differential aileron where the up-going aileron moves further than the down-going aileron is a design feature that helps to counteract:

Select one of the following:

  • O adverse aileron drag.

  • O the higher degree of spiral diving.

  • O lateral positive stability.

  • O lateral instability

Explanation

Question 59 of 66

1

328 The secondary effects of rudder and aileron are:

Select one of the following:

  • O rudder > roll ailerons > yaw and spiral dive

  • O rudder > turn ailerons > roll and spiral dive

  • O rudder > adverse yaw ailerons > skid

  • O rudder > yaw ailerons > turn and spin

Explanation

Question 60 of 66

1

329 When an aeroplane is disturbed from its established flight path, for instance when entering turbulent air, it is said to have positive stability if it consequently:

Select one of the following:

  • O re-establishes its original flight path without any pilot input.

  • O remains in the new flight path.

  • O becomes further displaced from its original flight path.

  • O oscillates about its original flight path without leaving its flight path.

Explanation

Question 61 of 66

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330 When an aeroplane is disturbed from its trimmed attitude, for instance when entering turbulent air, it is said to have neutral stability if it consequently:

Select one of the following:

  • O remains in the new attitude.

  • O oscillates about its original attitude before eventually settling in its original attitude.

  • O immediately re-establishes its original attitude.

  • O departs further from its original attitude and diverts.

Explanation

Question 62 of 66

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331 The centre of pressure by design is behind the aircraft centre of gravity which is balanced in straight and level flight by:

Select one of the following:

  • O the tailplane producing a downward force.

  • O the tailplane producing an upward force.

  • O neither an upward nor downward tailplane force as the aircraft will be in equilibrium.

  • O either an upward or downward tailplane force as the aircraft will not be in equilibrium.

Explanation

Question 63 of 66

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332 A balance tab is an auxiliary surface fitted to a main control surface, operated:

Select one of the following:

  • O independently by the pilot, to remove excessive control loads.

  • O automatically to assist the pilot in moving the controls.

  • O automatically to provide feel to the controls.

  • O artificial feel to the controls.

Explanation

Question 64 of 66

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333 With flaps lowered, lateral stability will:

Select one of the following:

  • O be reduced because the centre of lift is closer to the wing root.

  • O be increased because of increased lift.

  • O not be affected.

  • O be decreased because of increased lift.

Explanation

Question 65 of 66

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334 What is a Horn balance?

Select one of the following:

  • O A projection of the outer edge of the control surface forward of the hinge line.

  • O A rod projecting upward from the main control surface to which the control cables are attached.

  • O A rod projecting forward from the control surface with a weight attached to the end.

  • O None of them.

Explanation

Question 66 of 66

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335 The movement of the flying control surfaces is limited by:

Select one of the following:

  • O mechanical stops.

  • O aerodynamic forces.

  • O is not limited.

  • O servomotors.

Explanation