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3_POF EXAM PREP

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3_POF EXAM PREP

3_POF EXAM PREP

Question 1 of 50

1

159 Trailing edge flaps…………………….……………….landing attitude?

Select one of the following:

  • O Decrease.

  • O Increase.

  • O Do not affect,

  • O Increase or decrease depending on flap type.

Explanation

Question 2 of 50

1

160 Trailing edge flaps…………………………………….stalling angle?

Select one of the following:

  • O Decrease.

  • O Increase.

  • O Do not affect

  • O Increase or decrease depending on flap type.

Explanation

Question 3 of 50

1

161 The purpose of leading edge slats is to…………………………….?

Select one of the following:

  • O Increase stalling angle.

  • O Decreases stalling angle.

  • O Increase stalling speed,

  • O Create advanced turbulent boundary layer.

Explanation

Question 4 of 50

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162 Leading edge slats……………………...stalling angle?

Select one of the following:

  • O increase.

  • O Decrease.

  • O Do not affect.

  • O Increase or decrease depending on weight.

Explanation

Question 5 of 50

1

163 Asymmetric flap deployment………………………………………...?

Select one of the following:

  • O Causes loss of control.

  • O Improves lift performance.

  • O Is used to prevent asymmetric yaw.

  • O Is not possible.

Explanation

Question 6 of 50

1

164 The diagram (Fig.1), includes?

Select one of the following:

  • O Split flap

  • O Double slotted plain flaps.

  • O Leading edge flaps

  • O Double slotted fowler flaps.

Explanation

Question 7 of 50

1

165 The diagram (Fig.2), includes?

Select one of the following:

  • O Slat and plain flap.

  • O Drooped leading edge and plain flap.

  • O Leading edge flap.

  • O Double slotted split flaps.

Explanation

Question 8 of 50

1

166 Flap asymmetry causes…………………………………………….?

Select one of the following:

  • O Roll and yaw.

  • O Roll.

  • O Roll, pitch and yaw.

  • O None of the above.

Explanation

Question 9 of 50

1

167 Trailing edge flap deployment………….……………………...
pitch attitude required in take-off and landing?

Select one of the following:

  • O Decreases stalling speed and stalling angle of attack.

  • O Increases stalling speed and stalling angle of attack.

  • O Decreases stalling speed and angle of incidence.

  • O Improves stability.

Explanation

Question 10 of 50

1

168 Trailing edge flap deployment……………………………………………..
pitch attitude required in take-off and landing?

Select one of the following:

  • O Decreases,

  • O Increases.

  • O Does not affect.

  • O Increases or decreases depending on weight

Explanation

Question 11 of 50

1

169 Trailing edge flap deployment………………….power required?

Select one of the following:

  • O Increases.

  • O Decreases.

  • O Does not affect.

  • O Increases or decreases depending on C of G position.

Explanation

Question 12 of 50

1

170 Deployment of flaps………………………………………………….?

Select one of the following:

  • O Decreases lateral stability.

  • O Increases longitudinal stability.

  • O Decreases longitudinal stability.

  • O Increases lateral stability.

Explanation

Question 13 of 50

1

171 Trailing edge flap deployment...................................... ?

Select one of the following:

  • O Decreases stalling angle.

  • O Increases stalling angle.

  • O Does not affect stalling angle,

  • O Increases or decreases stalling angle depending on C of G position.

Explanation

Question 14 of 50

1

172 What effect does increasing load factor have on power required at any given aircraft eweight and TAS?

Select one of the following:

  • O Increases in direct proportion to load factor.

  • O .No effect.

  • O Decreases in direct proportion to load factor,

  • O Power required is inversely proportional to load factor.

Explanation

Question 15 of 50

1

173 What effect will increasing aircraft weight have on minimum drag speed (Vmd) and speed stability,

Select one of the following:

  • O Increase, Decrease.

  • O Increase, Increase.

  • O Decrease, Increase.

  • O Decrease, Decrease.

Explanation

Question 16 of 50

1

174 What effect will lowering the landing gear have on VMD and speed stability?

Select one of the following:

  • O Decrease, Increase,

  • O Increase, Increase.

  • O Increase, Decrease.

  • O Decrease, Decrease.

Explanation

Question 17 of 50

1

175 What is the relationship between Di and Dp at speeds below VMD?

Select one of the following:

  • O Di is greater than Dp.

  • O Di is less than Dp.

  • O Di = Dp.

  • O Di = DP =DTOTAL

Explanation

Question 18 of 50

1

176 Complete the following statement.
As airspeed changes from VMD to CLMAX………………………………..increases and………………. decreases.

Select one of the following:

  • O DI, DP.

  • O DP, DI.

  • O DTOTAL DP.

  • O D TOTAL DI.

Explanation

Question 19 of 50

1

177 Which of the following definitions of Dp is the most accurate?

Select one of the following:

  • O It is made up of friction, form and interference drag,

  • O It is made up of form, friction and induced drag.

  • O It is made up of friction, induced and shock drag.

  • O It is made up of interference, shock and form drag.

Explanation

Question 20 of 50

1

178 What causes wing tip vortices?

Select one of the following:

  • O High pressure air leaking from below the wings.

  • O Pressure differences in front of and behind the wings.

  • O Spanwise flow from tip to root under the wings,

  • O Spanwise flow from root to tip above the wings.

Explanation

Question 21 of 50

1

179 Which of the following occur at Vmd?

Select one of the following:

  • O Minimum drag and greatest L/D ratio.

  • O Minimum power required and best L/D) ratio.

  • O Minimum angle of attack and best rate of climb.

  • O Minimum drag and greatest jet propeller aircraft range.

Explanation

Question 22 of 50

1

180 In what direction does the drag force act?

Select one of the following:

  • O Parallel but opposite to the direction of flight.

  • O Parallel to relative airflow.

  • O Parallel to lift,

  • O Parallel to weight.

Explanation

Question 23 of 50

1

181 In what direction does lift act?

Select one of the following:

  • O At right angles to the flight path.

  • O Straight up.

  • O At right angles to the relative airflow.

  • O At right angles to thrust.

Explanation

Question 24 of 50

1

182 The majority of lift is produced by?

Select one of the following:

  • O Low pressure above the wing.

  • O High pressure below the wing.

  • O Increased velocity below the wing.

  • O Increased density below the wing.

Explanation

Question 25 of 50

1

183 What proportion of total drag is made up of induced drag when flying at VMD?

Select one of the following:

  • O 50%

  • O 75%

  • O 25%

  • O 100%

Explanation

Question 26 of 50

1

184 All other factors being equal, minimum drag is……………………………………………...?

Select one of the following:

  • O Proportional to weight.

  • O Constant.

  • O A function of density altitude.

  • O A function of pressure altitud

Explanation

Question 27 of 50

1

185 If air density is reduced by a factor of 4, by what factor will drag alter?

Select one of the following:

  • O Decrease by a factor of 4.

  • O Decrease by a factor of 2.

  • O Increase by a factor of 4.

  • O Decrease by a factor of 16.

Explanation

Question 28 of 50

1

186 Which of the following, causes induced drag (Di) ?

Select one of the following:

  • O Downwash of airflow over the trailing edge caused by wing tip vortices.

  • O Shock waves above and below the wing.

  • O Friction due to the air passing over the wing.

  • O Upwash of airflow over the trailing edge caused by wingtip vortices.

Explanation

Question 29 of 50

1

187 Which of the following is responsible for the creation of induced drag?

Select one of the following:

  • O Angle of attack, camber, wing area and airspeed.

  • O Pitch angle, camber, wing area and airspeed.

  • O Pitch angle, camber, wing area and angle of attack.

  • O Airspeed, wing area and pitch angle.

Explanation

Question 30 of 50

1

188 Entering ground effect causes?

Select one of the following:

  • O Downwash is reduced.

  • O Low pressure below the wings reduces lift

  • O Downwash is increased.

  • O The aircraft slows down.

Explanation

Question 31 of 50

1

189 In what way does ground effect influence induced drag?

Select one of the following:

  • O Decreases it.

  • O Increases it.

  • O No effect.

  • O Angles it aft.

Explanation

Question 32 of 50

1

191 What will be the effect of raising the undercarriage of an aircraft?

Select one of the following:

  • O Decreased profile drag and lower speed stability.

  • O Increased induced drag due to more efficient lift
    production.

  • O Decreased induced drag due to less efficient lift
    production.

  • O Increased profile drag and greater speed stability.

Explanation

Question 33 of 50

1

192 How will power required vary when leaving ground effect?

Select one of the following:

  • O increase.

  • O No change.

  • O Decrease.

  • O Decrease or increase depending on airspeed.

Explanation

Question 34 of 50

1

193 In what ways are Di and Dp proportional to V?

Select one of the following:

  • O (1/V)2 (V)2

  • O (V)3 (1/V)3

  • O Inversely.

  • O (V)2 (1/V)2

Explanation

Question 35 of 50

1

194 How does total drag vary with air density?

Select one of the following:

  • O Directly.

  • O Constant.

  • O Inversely.

  • O Conversely.

Explanation

Question 36 of 50

1

195 How does retraction of flaps affect induced drag if IAS remains constant?

Select one of the following:

  • O Decreases.

  • O Increases.

  • O Constant.

  • O Increase or decrease depending on speed.

Explanation

Question 37 of 50

1

196 ……………………………………………………….causes induced drag?

Select one of the following:

  • O The generation of lift.

  • O Angle of attack.

  • O Aspect ratio.

  • O Boundary layer separation.

Explanation

Question 38 of 50

1

197 Entering ground effect……………………………..power required?

Select one of the following:

  • O Decreases,

  • O Increases.

  • O Does not affect,

  • O Increases or decreases depending on height.

Explanation

Question 39 of 50

1

198 Increasing air temperature will......................................?

Select one of the following:

  • O Decrease lift at any given CL and TAS.

  • O Increase the gradient of the lift slope

  • O Decrease CL max.

  • O Increase profile drag.

Explanation

Question 40 of 50

1

199 Increasing humidity will………………………………………………………...?

Select one of the following:

  • O Increase required CL,

  • O Increase CL max.

  • O Decrease stalling speed,

  • O Increase profile drag.

Explanation

Question 41 of 50

1

200 Which of the following statements are true?
1. Increasing aspect ratio reduces induced drag.
2. Increasing sweep back angle reduces induced drag.
3. Increasing EAS increases induced drag.
4. Increasing CL increases induced drag.

Select one of the following:

  • O 1 and 4.

  • O 1,2 and 3.

  • O 1,3 and 4.

  • O 2,3 and 4.

Explanation

Question 42 of 50

1

201 ……………………………………………………………………………..aircraft weight will………………………………………………………………………ground effect?

Select one of the following:

  • O Increasing, increase.

  • O Increasing, decrease.

  • O Decreasing, increase.

  • O Decrease, diminish.

Explanation

Question 43 of 50

1

202 ……………………………………………………………………….landing speed at constant weight will……………………………….ground effect?

Select one of the following:

  • O Increasing,………………………………………..decrease.

  • O Increasing,………………………………………increase.

  • O Decreasing,…………………………………….stabilize,

  • O Decreasing,……………………………………decrease

Explanation

Question 44 of 50

1

203 Increasing load factor will…………………………………..Dp,………………………VMD and………………………………..speed dtability.

Select one of the following:

  • O Not affect, Increase, Decrease,

  • O Increase, Increase, Increase.

  • O Decrease, Decrease, Decrease,

  • O Not affect, Decrease, Increase

Explanation

Question 45 of 50

1

204 Why might trim tabs be employed in power assisted flying controls?

Select one of the following:

  • O To reduce control forces to zero,

  • O To enable control to be maintained following hydraulic failure.

  • O To prevent overstressing of hydraulic actuators.

  • O To provide better sability.

Explanation

Question 46 of 50

1

205 How is control mass balance achieved?

Select one of the following:

  • O By fitting weights onto or in front and above the leading edge.

  • O By fitting weight aft of the hinge.

  • O By fitting weights into the tip cap.

  • O By fitting a extra weights to the aft of fuselage.

Explanation

Question 47 of 50

1

206 In a climbing turn the ................wing is likely to stall..... ……...causing the aircraft to.. .......and yaw .......... the turn?

Select one of the following:

  • O Outer first roll out of.

  • O Outer last pitch in to.

  • O Inner first roll in to.

  • O Inner last pitch out of.

Explanation

Question 48 of 50

1

207 In a descending turn the ......... wing is likely to stall...... causing the aircraft to……
...and yaw ............'the turn?

Select one of the following:

  • O .Inner first roll in to.

  • O .Outer last pitch in to.

  • O Outer first roll out of.

  • O .Inner last pitch out of.

Explanation

Question 49 of 50

1

208 A swept............................wing is prone to..............................all due to separation of boundary layer air at the...............?

Select one of the following:

  • O Back tip tips

  • O Forward root roots

  • O Back tip roots,

  • O Forward root tips.

Explanation

Question 50 of 50

1

209 Straight wings are prone to pitch..................in low speed stall and pitch........................in high speed stall?

Select one of the following:

  • O Down up then down.

  • O Down up.

  • O Up up.

  • O d Up down then bank.

Explanation

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