5785270
Description
Quiz by tsampikos pompou, updated more than 1 year ago
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Created by tsampikos pompou
over 8 years ago
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Question 1
Question
352 Which of the following statements about propellers is true?
Answer
-
O Angle of attack is the angle between the chord line of the blade and the relative airflow.
-
O Critical tip speed is the RPM at which there is a risk of some part of the blade stalling.
-
O Effective pitch is the distance that a propeller would move forward in one turn if there were no slip.
-
O Blade angle is the angle between the chord line of the blade and the shaft axis.
Question 2
Question
353 What is propeller blade angle?
Answer
-
O The angle between the chord line of the blades and the plane of rotation of the propeller.
-
O The angle between the chord line of the blades and the axis of the propeller shaft.
-
O The angle between the chord line of the blades and the total reaction.
-
O The angle between the chord line of the blades and the free stream airflow.
Question 3
Question
354 Why is it necessary to vary blade angle from root to tip?
Answer
-
O To ensure that angle of attack is acceptable over the whole blade.
-
O To avoid overstress.
-
O To achieve higher performance..
-
O To ensure that most thrust is produced at the tips.
Question 4
Question
355 Which of the following is true of a constant speed propeller?
Answer
-
O Blade angle increases with increasing TAS.
-
O Governor keeps blade angle constant.
-
O Governor lubricates only the propeller shaft.
-
O Blade angle decreases with increasing TAS.
Question 5
Question
356 Which of the following will increase the angle of attack of a fixed pitch
propeller?
Answer
-
O Increase RPM and decrease TAS.
-
O Increase loading..
-
O Μakes propeller moving velocity zero.
-
O Decrease RPM and increase TAS.
Question 6
Question
357 Which of the following will increase the angle of attack of a fixed pitch propeller?
Answer
-
O Pull up into a climb without increasing power.
-
O Push down into a dive without decreasing power.
-
O Decrease RPM while diving.
-
O Μakes propeller moving velocity zero.
Question 7
Question
358 How does drag on a windmilling propeller compare with that on a stationary one?
Answer
-
O Higher.
-
O Lower.
-
O Lower or higher depending on tip stall.
-
O Equal.
Question 8
Question
359 During take-off using a right handed tractor propeller, torque reaction will cause?
Answer
-
O Left roll and yaw.
-
O Pitch up.
-
O Maximum performance.
-
O Right roll and yaw.
Question 9
Question
360 During the take-off run using a right handed tractor propeller, the torque reaction will cause?
Answer
-
O Decreased load on right wheel and increased on left.
-
O Increased load on right wheel and decreased on left wheel.
-
O Increased load on the total gear.
-
O Increased load on front wheel.
Question 10
Question
361 During take-off using a tail wheel and right handed tractor propeller, the asymmetric blade effect will cause?
Answer
-
O Left yaw.
-
O None of the them.
-
O Left roll.
-
O Pitch down.
Question 11
Question
362 During take-off using a tail wheel and right handed tractor propeller, gyroscopic precession will cause?
Answer
-
O Left yaw.
-
O Pitch up.
-
O Left roll.
-
O Pitch down.
Question 12
Question
363 Propeller gyroscopic precession force is induced by?
Answer
-
O RPM change.
-
O Right yaw and left roll.
-
O Left yaw and right roll.
-
O MΑP change.
Question 13
Question
364 Geometric pitch is?
Answer
-
O The distance moved forward through the air in one revolution, if angle of attack was zero.
-
O Helix angle minus angle of attack.
-
O Helix angle with maximum TAS.
-
O The distance moved forward in one revolution per second.
Question 14
Question
365 Helix angle is?
Answer
-
O Blade angle minus angle of attack.
-
O Blade angle plus angle of attack.
-
O Wing blade wash out..
-
O Blade angle applied in real life.
Question 15
Question
366 Blade angle is?
Answer
-
O Helix angle plus angle of attack.
-
O Helix angle minus angle of attack.
-
O The angle that velocity due to forward motion is maximum .
-
O The angle for best performance.
Question 16
Question
367 A feathered propeller produces?
Answer
-
O Minimum drag.
-
O Maximum drag.
-
O Optimum spiral diving capability .
-
O Minimum glide speed.
Question 17
Question
368 For a fixed pitch propeller?
Answer
-
O Angle of attack decreases with increasing TAS.
-
O Blade angle increases with increasing MΑP.
-
O Angle of attack increases with increasing TAS.
-
O Ηelix angle decreases with increasing RPM.
Question 18
Question
369 For a fixed pitch propeller?
Answer
-
O Angle of attack increases with increasing RPM.
-
O Blade angle increases with increasing RPM.
-
O Angle of attack increases with aid of governor.
-
O Angle of attack decreases with increasing RPM.
Question 19
Question
370 For a constant speed propeller?
Answer
-
O Blade angle increases with increasing RPM.
-
O Βlade, helix angle and angle of attack remain constant.
-
O Blade angle decreases with increasing RPM.
-
O Angle of attack decreases with increasing RPM.
Question 20
Question
371 For a constant speed propeller?
Answer
-
O Blade angle increases with increasing TAS.
-
O Βlade, helix angle and angle of attack remain constant.
-
O Blade angle decreases with increasing TAS.
-
O Angle of attack decreases with increasing TAS.
Question 21
Question
372 If the propeller RPM lever is pushed forward in a glide it will?
Answer
-
O Increase drag.
-
O Increase range.
-
O Increase spark plug fouling .
-
O Improve cooling.
Question 22
Question
373 If propeller pitch is increased in a long glide?
Answer
-
O RPM will decrease and range will increase.
-
O RPM will remain constant.
-
O RPM and range will decrease.
-
O RPM will increases and range will decrease.
Question 23
Question
374 A constant speed propeller.............................compared to a fixed pitch propeller?
Answer
-
O is more efficient.
-
O is lighter.
-
O is stronger.
-
O is simpler in construction.
Question 24
Question
375 Propeller blade twist?
Answer
-
O Reduces blade angle from root to tip.
-
O Increases blade angle from root to tip.
-
O Is for strength only.
-
O Varies with RPM selection.
Question 25
Question
376 Angle of attack is?
Answer
-
O Lowest at the tips.
-
O Lowest at the roots.
-
O Lowest at the 30% radius.
-
O Uniform at all points along the blade.
Question 26
Question
377 If TAS increases at constant altitude, a constant speed propeller will…………………………………………………………….………?
Answer
-
O maintain constant angle of attack.
-
O decrease helix speed.
-
O increase blade speed.
-
O maintain constant blade angle.
Question 27
Question
378 When leaning the fuel/air mixture at altitude, to achieve the most efficient mixture, the control is first moved towards the LEAN position until the engine RPM:
Answer
-
O decreases. The mixture control is then moved slightly to the RICH side of peak RPM.
-
O increases. The mixture control is then left in that position.
-
O increases by approximately 125 RPM. The mixture control is then moved slightly more towards the LEAN position.
-
O D - decreases by approximately 125 RPM. The mixture control is then moved slightly more towards the LEAN position.
Question 28
Question
379 The restrictive throat of a carburettor venturi changes the characteristics of the air that passes through it. These are:
Answer
-
O a drop in ambient air pressure and velocity increase.
-
O a dynamic pressure increase and a velocity decrease.
-
O a dynamic pressure decrease and a velocity increase.
-
O a dynamic pressure increase and ambient air pressure increase.
Question 29
Question
380 Which of the following prevents excessive engine oil pressures?
Answer
-
O An oil pressure relief valve.
-
O A ball valve.
-
O A by-pass valve.
-
O A non return valve.
Question 30
Question
380B For every crankshaft rotation in a piston engine, the camshaft rotates:
Answer
-
O one half of one revolution because the camshaft operates at half engine speed.
-
O the carburettor float chamber.
-
O the combustion chamber.
-
O the CHT sensor thermowell.
Question 31
Question
381 When a fuel priming pump is used before starting an engine, the fuel is normally delivered directly to:
Answer
-
O the induction manifold.
-
O the carburettor float chamber.
-
O the combustion chamber.
-
O the CHT sensor thermowell.
Question 32
Question
382 The valve that allows oil to by-pass a blocked engine oil cooler is:
Answer
-
O pressure activated.
-
O temperature activated.
-
O gravitationally activated.
-
O differentially density activated.
Question 33
Question
383 At sea level, the power developed by a four-stroke piston engine:
Answer
-
O increases along with RPM.
-
O increases proportional to RPM to about 55% throttle setting, then decreases.
-
O increases proportional to RPM to about 55% throttle setting, then remains constant.
-
O increases proportional to RPM to about 55% throttle setting, then increases.
Question 34
Question
384 In respect of a low wing aircraft, failure to close a fuel strainer drain valve prior to flight:
Answer
-
O may cause fuel starvation if the electric pump is not used.
-
O will cause a lean mixture moment by moment to be produced by the carburettor.
-
O may result in an inability to start the engine due to the formation of a vapour lock in the tank.
-
O will cause RPM instability during taxying.
Question 35
Question
385 Information transmitted to the cockpit mounted engine oil temperature gauge is provided by a temperature sensor fitted:
Answer
-
O after passing through the oil cooler but before reaching the hot sections of the engine.
-
O anywhere within the hot sections of the engine.
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O upstream of the oil cooler.
-
O within the engine sump.
Question 36
Question
386 Detonation of the fuel/air mixture in a piston engine has to do with:
Answer
-
O weak mixtures and high cylinder head temperatures.
-
O a higher octane grade than certified.
-
O rich mixtures and low cylinder head temperatures.
-
O fouled spark plugs due to prolonged engine operation using over rich mixtures.
Question 37
Question
387 During pre-ignition, the smooth running of a four-stroke piston engine is often disturbed by:
Answer
-
O a carbonised hot spot in the combustion chamber causing premature ignition of the fuel/air mixture.
-
O an uncontrolled explosion of the fuel/air mixture.
-
O slow burning of a rich mixture in a hot engine.
-
O rapid combustion of any mixture exists in the hot cylinder.
Question 38
Question
388 A 65 amp/hour battery will, in theory, supply 13 amps for up to:
Answer
-
O 5 hours.
-
O 2 hours.
-
O 4 hours.
-
O 6 hours.
Question 39
Question
389 Two 12 volt 65 ampere/hour capacity batteries connected in series would result in a total capacity of:
Answer
-
O 65 ampere-hours at 24 volts.
-
O 35 ampere-hours at 12 volts.
-
O 45 ampere-hours at 24 volts.
-
O 65 ampere-hours at 12 volts.
Question 40
Question
390 A magneto that inadvertently becomes disconnected from its ignition switch will:
Answer
-
O cause the engine to continue running when both magneto switches are turned off (earthed).
-
O cause a dead cut when the other magneto is switched off.
-
O cause the failure of one plug in each cylinder.
-
O cause the engine to misfire when the other magneto is switched off.
Question 41
Question
391 Which of the following statements concerning Bernoulli theory, is correct?
Answer
-
O Ptot = Pstat + Pdyn
-
O Pitot = Pdyn - Pstat
-
O Pdyn = Ptot - Pitot
-
O Pitot =Ptot/ Pdyn.
Question 42
Question
392 Refering to Pittot, when entering ground effect, is likely to?
Answer
-
O Increase position errors.
-
O Not to be affected.
-
O Decrease pitot pressure but increase static pressure.
-
O Decrease position errors.
Question 43
Question
393 (Fig5.) If the static tube and drains become blocked?
Answer
-
O The ASI will under or over indicate depending on altitude.
-
O The ASI will under indicate;
-
O The ASI will over indicate.
-
O The ASI will be deflected full scale.
Question 44
Question
394 (Fig.7) If the static tube and drains become blocked?
Answer
-
O The altimeter will under or over indicate depending on altitude.
-
O The altimeter will under indicate.
-
O The altimeter will indicate full scale deflection.
-
O The altimeter will over indicate.
Question 45
Question
395 (Fig.6) If the static vents in an un-pressurised light aircraft become blocked?
Answer
-
O Breaking the front glass will enable the altimeter to function.
-
O Breaking or opening the windows will enable the ASI to function.
-
O Breaking or opening the windows will enable the altimeter to function.
-
O Breaking the front glass will trigger the needle to fluctuate.
Question 46
Question
396 (Fig.6) If the static source becomes blocked in a descent the ASI will.... indicate, the VSI will..............indicate and the altimeter will............indicate?
Answer
-
O Over under over.
-
O Under under under.
-
O Under over over.
-
O Over under under
Question 47
Question
397 (Fig.6) A blocked pitot probe will affect?
Answer
-
O ASI.
-
O VSI.
-
O Altimeter.
-
O All of the above instruments.
Question 48
Question
398 (Fig.6) A blocked static vent will affect?
Answer
-
O All of the above instruments..
-
O ASI.
-
O VSI.
-
O Altimeter.
Question 49
Question
399 What is density altitude?
Answer
-
O Pressure altitude corrected for ambient temperature.
-
O True altitude corrected for non std. conditions.
-
O Pressure altitude corrected for density changes.
-
O True altitude corrected for density changes.
Question 50
Question
400 What will happen to altimeter indication if an aircraft in level flight enters in a cold Front mass?
Answer
-
O Over indication.
-
O Under indication.
-
O No change.
-
O Is usually blocked by ice accumulations.
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