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PPL Technical Practice 4

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Aviation Quiz on PPL Technical Practice 4, created by kiwi_cam on 02/04/2015.
kiwi_cam
Quiz by kiwi_cam, updated more than 1 year ago
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Created by kiwi_cam over 9 years ago
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Resource summary

Question 1

Question
Valve lag is the
Answer
  • inlet valve closing after the BDC of the induction stroke
  • inlet valve closing after TDC of the exhaust stroke
  • exhaust valve closing after the TDC of the exhaust stroke
  • exhaust valve closing after the BDC of the induction stroke

Question 2

Question
Spark plug fouling can be prevented by
Answer
  • Avoiding operating the engine at low RPM for long periods
  • Applying short bursts of power whilst taxiing
  • Maintaining engine RPM within the red arc on the tachometer
  • Operating the engine at low RPM occasionally

Question 3

Question
Which of the following best describes a wet sump oil system?
Answer
  • A portion of the oil is stored in the sump and is topped up from the oil tank
  • Used oil is collected in the sump and returned to the oil tank
  • All the oil is contained within the engine
  • No oil is needed for lubrication in this system

Question 4

Question
Airflow through a venturi, such as a carburettor, causes
Answer
  • increasing pressure and decreasing velocity at the throat
  • increasing velocity and decreasing pressure at the throat
  • increasing velocity and increasing pressure at the throat
  • increasing velocity and increasing pressure at the outlet

Question 5

Question
A bourdon tube change it's what when the pressure within changes?
Answer
  • Temperature
  • Density
  • Length
  • Curvature

Question 6

Question
Detonation could result from
Answer
  • A higher grade of fuel than recommended
  • Too low a manifold pressure
  • Too weak a mixture
  • Too rich a mixture

Question 7

Question
When a fuel priming pump is used, the fuel is normally delivered into the -
Answer
  • Induction manifold or inlet valve port
  • Booster pump
  • Carburettor float chamber
  • Combustion chamber

Question 8

Question
If a fuse blows in flight it
Answer
  • should not be replaced until after landing
  • may be replaced in the air once, with a fuse of the same value
  • may be replaced with a fuse of a higher value to prevent blowing again
  • may be replaced in the air once, with a fuse of a lower value

Question 9

Question
In the event of an alternator failure in flight the
Answer
  • Electrical load should be reduced and the flight continued
  • Electrical load should be reduced and a landing made at the nearest suitable airfield
  • Master switch should be turned off and the flight continued without electrics
  • Flight may be continued because the battery will supply the electricity

Question 10

Question
In a diesel engine, ignition occurs through
Answer
  • A spark plug
  • A fuse wire
  • Compression
  • An open flame

Question 11

Question
The yellow arc on the airspeed indicator represents the
Answer
  • Caution range
  • Flap operating range
  • Normal operating range
  • Never exceed range

Question 12

Question
In flight is is observed that the vacuum gauge reads zero, however the vacuum driven instruments appear to be functioning normally. This implies that -
Answer
  • The vacuum gauge has failed
  • Nothing is wrong
  • The air filter is blocked
  • The vacuum pump has failed

Question 13

Question
The apparent drift of a direction indicator is caused by -
Answer
  • Mechanical wear in the instrument
  • Movement of the gyroscope spin axis
  • Slowing of the gyroscope rotor
  • Rotation of Earth

Question 14

Question
When referenced to the stall of a clean airfoil, extended trailing edge flaps will give
Answer
  • A higher geometric stalling angle of attack
  • A higher stalling speed
  • The same stalling angle of attack
  • A lower geometric stalling angle of attack

Question 15

Question
What happens to the turn rate and radius in a level turn if airspeed is increased?
Answer
  • Rate increases, radius decreases
  • Both increase
  • Rate decreases, radius increases
  • Both decrease

Question 16

Question
An increase in airspeed, for a constant angle of attack causes
Answer
  • Decreased lift and increased profile drag
  • No change in lift but increased profile drag
  • Increased lift and no change in profile drag
  • Increased lift and increased profile drag

Question 17

Question
An aircraft is said to be in equilibrium when
Answer
  • Weight equals drag and lift equals trust
  • Weight equals lift and drag equals thrust
  • Lift equals weight and drag equals power
  • Lift equals drag and thrust equals weight

Question 18

Question
At high speed control surfaces may be prone to flutter, this is avoided by
Answer
  • Fitting mass balances forward of the hinge line
  • Using an anti-balance tab
  • Using a trim tab
  • Using a horn balance

Question 19

Question
The coefficient of lift is at its maximum value at
Answer
  • The critical angle of attack
  • The IAS for minimum drag
  • Four degrees angle of attack
  • A negative angle of attack

Question 20

Question
The elevators control the aircraft in ________ about the ________ axis
Answer
  • Roll, longitudinal
  • Pitch, longitudinal
  • Pitch, lateral
  • Roll, lateral

Question 21

Question
As the airspeed of an aircraft in increased
Answer
  • Induced drag increases and parasite drag decreases
  • Induced drag decreases and parasite drag increases
  • Both induced drag and parasite drag increases
  • Both induced drag and parasite drag decreases

Question 22

Question
An aircraft with an aft CoG is
Answer
  • Stable in pitch
  • Harder to stall
  • Sensitive to pitch
  • Easy to recover from a spin

Question 23

Question
On take-off in an aircraft with a clock wise turning propellor (as viewed from the cockpit) the torque reaction causes
Answer
  • The tail to rise
  • Roll to the right
  • The nose to rise
  • Roll to the left

Question 24

Question
If the CG of an aircraft is at or near the forward limit, this will cause
Answer
  • Higher elevator forces during the flare just before touchdown
  • A reduction in basic stalling speed
  • A decrease in take off speed
  • Increased static stability damping

Question 25

Question
Rotational speed of the engine is measured by
Answer
  • Ratiometer
  • Tachometer
  • Spin gauge
  • Engine speed indicator
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