Font size
WorksheetsAir Tech - PPL Exam Ready
Total questions: 89
Worksheet time: 46mins
The blade back is the flat part of the propeller blade
True
False
If you wanted to decrease power in an aircraft with a CSU what is the order you would operate the levers in the cockpit?
Throttle, Pitch, Mixture
Mixture, Pitch, Throttle
Pitch, Throttle, Mixture
Mixture, Throttle, Pitch
What is the main advantage of a variable pitch propeller?
It is most efficient at a wide range of airspeeds
It is lighter
It is more simple to operate
A variable pitch propeller can provide more horsepower
What is the helix angle
The angle between the chord line and the plane of rotation
The angle between the chord line and the RAF
The angle between the RAF and the plane of rotation
The angle between the advance per revolution and the relative airflow
Why is a propeller twisted?
To maintain the correct angle of attack across the length of the blade
To maintain the correct blade angle across the length of the blade
To be more aerodynamic
To reduce the amount of drag the propeller blade creates
What type of Gyro does the DI use?
Tied
Earth
Rate
Space
The TC's gyro is inclined at 30 degrees?
True
False
An earth gyro's axis of rotation with parallel with the surface of the earth?
true
false
Select all that apply: Which instruments utilise the use of a gyroscope?
ASI
A/H
DI
Compass
What is the maximum permissible real drift that a DI can be subject to?
4 deg per 15min
16 deg per 30min
12 deg per hour
15 deg per hour
What is precession?
The tendency for a force to be felt 90 deg against the plane of rotation
The tendency for a force to be felt 90 deg in the plane of rotation
The tendency for a force to be felt where it is applied
The tendency for a force to be felt 45 deg in the plane of rotation
Select all that apply: What is the purpose of the fluid in the compass?
To dampen the movement of the compass
Lubrication
Buoyancy
Magnification for easier reading
You are flying a heading of 215 deg M and need to turn onto 330 deg M. Your DI is unserviceable, what compass heading do you turn onto to correctly roll out on your desired heading?
000
330
310
350
You are flying a heading of 355 deg M and need to turn onto 240 deg M. Your DI is unserviceable, what compass heading do you turn onto to correctly roll out on your desired heading?
250
230
240
245
What is the purpose of the crankshaft?
To facilitate valve timing
To wind MCL up
To convert the movement of the pistons to power at the propeller
To connect the piston to the camshaft
What is the third stroke of a four stroke engine for?
Combustion
Intake
Exhaust
Compression
What facilitates valve timing?
crankshaft
camshaft
connecting rod
cylinder
What are the advantages of a dual ignition system?
redundancy if one spark plug was to fail
more responsive controls and its safer
more efficient burning in the cylinder
more efficient combustion and its safer
Which statement is correct?
An engine would not run from one magneto and one spark plug
In one cylinder each spark plug is run by a separate magneto
Each cylinder is run by a separate magneto
There are generally 4 spark plugs per cylinder run from the magnetos
What is impulse coupling?
When the left magneto produces a large advanced spark for starting
When the left magneto produces a large delayed spark for starting
When the right magneto produces a large delayed spark for starting
When the right magneto produces a large advanced spark for starting
When should peak pressure be developed for most efficient operation?
55 degrees before TDC
15 degrees before BDC
11 degrees after TDC
30 degrees after BDC
What happens to CoP, lift and drag at 16 degrees angle of attack
Lift is minimum, drag is maximum and CoP moves rearwards
Lift is minimum, drag is minimum and CoP is at a rearward position
Lift is maximum, drag is low, CoP moves forwards
Lift is maximum, drag is high, CoP is at it's forward most point
Which statement is correct
Stall is associated with an airspeed
Stall is associated with an angle of attack
Stalling will only occur when the throttle is closed
Flap causes stall speed to increase
Which statement is correct
L=CD 1/2 p V² S
L proportional to a/a x a/s
L=CL 1/2 p V S
CL = a/a x a/s
What is a wingdrop stall?
When both wings stall together
When the aircrafts nose pitches up close to the stall
When one wing stalls before the other
When the aircraft is stalled, rolling, yawing and pitching
Which instrument(s) take in static pressure?
ASI, VSI
ASI, VSI, ALI
ALT, VSI
ALT, VSI, ASI
What is static pressure?
ambient pressure
pressure due to movement
dynamic pressure - total pressure
dynamic pressure + total pressure
What is the basic principle of the ASI?
Pitot pressure enters a capsule and static pressure surrounds it in the instrument casing
Static pressure enters a capsule and slowly leaks into the instrument casing
Static pressure enters a capsule and pitot pressure surrounds it in the instrument casing
Static pressure enters the instrument casing and a capsule expands or contracts as the pressure changes
What is the basic principle of the VSI?
Pitot pressure enters a capsule and static pressure surrounds it in the instrument casing
Static pressure enters a capsule and pitot pressure surrounds it in the instrument casing
Static pressure enters the instrument casing and a capsule expands or contracts as the pressure changes
Static pressure enters a capsule and slowly leaks into the instrument casing
What is the basic principle of the altimeter?
Pitot pressure enters a capsule and static pressure surrounds it in the instrument casing
Static pressure enters a capsule and slowly leaks into the instrument casing
Static pressure enters a capsule and pitot pressure surrounds it in the instrument casing
Static pressure enters the instrument casing and a capsule expands or contracts as the pressure changes
What does Vs1 mean?
Max speed in landing configuration
Stall speed in landing configuration
Stall speed in clean configuration
Max flap extension speed
What is the upper limit on the green range of the ASI?
Vfe
Vso
Vne
Vno
What is the lower limit on the yellow range of the ASI?
Vfe
Vso
Vne
Vno
What is the upper limit on the white range of the ASI?
Vfe
Vso
Vne
Vno
What is the difference between IAS and EAS? Choose all that apply
pressure error
intermediate error
compressibility error
deviation error
density error
What does QNE mean or read?
sea level temperature
altitude
pressure from a datum
pressure altitude
Flying from 999hPa to 1031hPa will cause ______
The aircraft's true altitude to be lower than indicated
A danger with terrain clearance
The aircraft's true altitude to be higher than indicated
Nothing - only temperature causes an error in the altimeter
If there is a static vent blockage, what will happen to the altimeter reading in a climb?
instrument will over read altitude
instrument will read zero feet
instrument will under read altitude
instrument will not be affected as ALT uses pitot
If there is a pitot tube blockage, what will happen to the ASI reading in a climb?
instrument will under read speed
instrument will over read speed
instrument will read zero knots
instrument will not be affected as ASI uses static only
If there is a pitot tube blockage, what will happen to the ALT reading in a climb?
instrument will under read altitude
instrument will over read altitude
instrument will read zero feet
instrument will not be affected as ALT uses static only
What is being described:
A radiator type-cooler which cools the compressed intake air to increase its density for more power per rpm
turbocharger
intercooler
centrifugal coolant compressor
dodge charger cooler
What is the purpose of a turbocharger?
to compress intake air and is run off the engine
to compress intake air through stages of discs found in a turbine engine
to compress exhaust gases to be reused as intake air
to compress intake air and is run off exhaust gases
AVTUR is a type of ____
AVGAS
Kerosene
Diesel
MOGAS
What would happen without oil for lubrication?
Extremely high temperatures from friction forces
Fuel pressure would reduce to a minimum
The valves wouldn't have enough pressure to open and close
Power settings would have to be set lower than normal
An oil that flows slowly is said to have what type of viscosity?
high
low
An SAE of 50 would give a commercial aviation grade of ____
10
25
60
100
Which statement is incorrect?
Dry sump is better than wet sump for aerobatic aircraft
The pressure relief valve is located on the engine side of the oil pump
A wet sump has a seperate reservoir tank
An oil-filter bypass valve will operate if filter becomes blocked
Oil below the minimum level could cause:
Select all that apply
a low oil temperature
a high oil temperature
a high oil pressure
a low oil pressure
When is the engine most likely to overheat?
When the fuel pump is switched off
When in a high power dive
When in a high power climb
When in a low power descent with carb heat on
What action would you NOT take in the event of a engine fire during start?
fuel pump OFF
mixture RICH
fuel selector OFF
magnetos CRANK STARTER
Why is a fuel vent required in the tanks?
Select all that apply
to allow for excess pressure to be vented
to drain for contaminants
to prevent tank collapsing during fuel consumption
to allow water to be removed from the surface of the fuel
Where is 'unusable fuel' taken from?
fuel drain
expansion space
fuel vent
sump
Why should you not run a tank dry before swapping tanks?
vapour locking could occur
fuel pressure might exceed higher limits
oil pressure may drop too low
mixture may become too lean
What fuel is straw colouored or clear?
MOGAS
AVGAS
AVTUR
How is AVGAS displayed?
black letters on white background
white letters on black background
red letters on white background
white letters on red background
If a fuel cap is accidentally left off fuel may be siphoned out of the tank due to the ____ pressure above the wings.
high
low
A modern light aircraft has a ____ electrical system.
B.B.C
D.C
B.B.S
A.C
A battery with an ampere hour rating of 800 will last how long when running 10 amps an hour?
10 hours
18 hours
80 hours
180 hours
A Nicad battery is smaller, lighter and more efficient than a lead-acid battery.
true
false
What is the alternator run off?
The battery
The camshaft
The engine
The magnetos
What does an inverter do?
changes A.C to D.C
changes D.C to A.C
steps A.C at one voltage up or down to another voltage
steps D.C at one voltage up or down to another voltage
A generator is produced with a commutator to automatically produce ____
DC
AC
What is the purpose of the bus bar?
to stop the alternator overcharging the battery in flight
to aid with starting aircraft if battery is flat or capacity is too low
to conduct and distribute power around the electrical units
to measure the current flowing in the circuit
What does a left-zero ammeter measure?
the charge into and out of the battery
the output of the battery
the output of the alternator
the charge into and out of the alternator
After starting the engine the centre zero ammeter will move .....
left of centre
right of centre
stay on centre zero
stay on left zero
How many times can you reset a circuit breaker?
0
1
2
3
What should you do if you notice insufficient charge to the battery?
pop the circuit breakers for all unnecessary equipment
turn on all lights to ensure you are visible to other aircraft
turn off unnecessary equipment to conserve the battery
turn the battery off then on again
Power is _____ x______ / _______
force x mass / time
mass x velocity / force
velocity x time / distance
distance x force / time
work is measured in ...
watts
joules
kilograms
newtons
What is the force that pulls towards the centre of the curve?
centrifugal force
forward component of weight
centripetal force
total reaction
What is the rate of doing work?
power
force
kinetic energy
potential energy
What is a moment?
a turning force about a pivot or turning point
two equal and opposite parallel forces
a force produced when mass is attracted to Earths surface
force required to accelerate 1kg at 1m/sec/sec
What provides the aerofoil shape of the wings?
longerons
stringers
spars
ribs
What is work, power and moment measured in?
W, J, Nm
J, W, Nm
N, W, J
Nm, J, W
What is the following:
"for every action there is an equal and opposite reaction"
newtons 1st law
newtons 2nd law
newtons 3rd law
bernoullis theorem
Two equal and opposite forces are known as ________
torque
moment
couple
centripetal force
What is the purpose of the venturi in the carburettor?
to cool down the fuel/air mixture for evaporation
to heat up the fuel/air mixture for evaporation
to draw out the fuel from the nozzle
to accelerate air so the throttle butterfly doesnt flutter
What system ensures there's sufficient fuel for engine operation when the throttle control is closed?
accelerating system
enrichment system
idling system
idle cut-off system
In 'standard' sea level conditions, mixture should be set to...
FULL RICH
FULL LEAN
IDLE CUT OFF
50% LEAN
What will an over-lean mixture most likely create?
detonation due to too much fuel
pre-ignition due to too much fuel
detonation due to not enough fuel
pre-ignition due to not enough fuel
A knocking sound accompanied by an excessively high CHT reading would indicate _______
pre ignition
detonation
flooded engine
low oil pressure
_____ may occur in the one cylinder whereas _____ normally occurs in all cylinders
pre-ignition, detonation
detonation, pre-ignition
What ice forms immediately downstream of the main metering jet on the venturi?
refrigeration ice
throttle ice
intake ice
impact ice
Refrigeration ice can occur with temperatures as high as ____ when RH exceeds _____
15 degrees, 15%
25 degrees, 10%
10 degrees, 50%
25 degrees, 50%
How do you get rid of impact icing?
carb heat
climb into warm sector
descend into warmer air
increasing throttle setting
Direct injection is more complex, heavier and more expensive than indirect fuel injection
true
false
Fill in the blanks for a fuel injected aircraft:
A _____ senses mass of air entering and throttle and mixture positions. The metered fuel passes through the _____ and then to the ____ in the required cylinder.
fuel injection nozzle, fuel control unit, flow divider
fuel injection nozzle, flow divider, fuel control unit
fuel control unit, fuel injection nozzle, flow divider
fuel control unit, flow divider, fuel injection nozzle
in the exit of a venturi:
dynamic pressure reduces and static pressure reduces
dynamic pressure increases and static pressure reduces
static pressure increases and dynamic pressure increases
static pressure increases and dynamic pressure reduces
Where is the minimum drag and you best lift to drag ratio found?
A
B
C
