Questions Flashcards
Which direction do floor beams lay?
Along the fuselage length
What happens to the horizontal stabiliser if the aircraft’s centre of gravity moves forward?
The leading edge of the stab moves down
In regards to air-con, what is the pressure regulator known as?
Bleed valve
In regards to air-con, what regulates the pressurisation of the cabin?
Outflow valve
What is the level of advisory I.A.W instrument systems?
Level C/1
What frequency is the right lobe I.A.W avionics systems
150Hz
What frequency is the upper lobe I.A.W avionics systems?
90Hz
What is the angle of the white lights I.A.W 11.14?
70
What does mode S on the transponder do?
The transponder can be activated selectively, can transmit address and identification
What does mode A on a transponder do?
Can only transmit identification codes
What is the main function of a Stabilator?
Eliminate Mach tuck caused by a shock wave formation
What is the purpose of vortex generators?
They provide the boundary layer with additional energy to prevent flow separation
What is the effect of pulling the control column rearwards?
Elevators deflect upward, aircraft nose up
How do the ailerons respond if the pilot rolls the aircraft to the left?
The aileron on the left wing moves up and the aileron on the right wing moves down
How does the area rule affect an aircraft’s transonic flight performance?
It reduces wave drag
What are the 2 types of shock waves that are formed in supersonic flight?
Normal and Oblique
What happens to air temperature behind a shock wave?
The temperature rises
If one aircraft structural component fails, another component will assume the failed member, what is this called?
Fail safe
A structure in which multiple attachment points share the load instead of one attachment point is an example of?
Fatigue sharing
The rear pressure bulkhead would separate which zones?
200-300
What load is carried by longerons?
Primary bending loads
What are the 2 main types of construction of a fuselage structure on modern aircraft?
Monocoque and semi-monocoque construction
What are the 3 main areas of the wing structure?
Centre, left and right wing boxes
What creates a smooth joint between fin and fuselage?
Dorsal fin
What is the rudder attached to?
Rear of vertical fin
When measuring the deflection angle of the elevator, and before the elevator can be in zero position, what is the position of the moveable stabiliser?
The moveable stabiliser must be in the moveable position
Following repairs to the flight control surface, adjustments would need to be made to achieve what?
Static balancing
What is the purpose of a pylon?
To attach the engine to the airframe/wing
How many attachment points does the pylon have to the wing?
3
Which supply sources are used to supply the AC system?
APU, Engines and Ground powered air supply
What is the role of the pneumatic controller?
Monitor pressure and temperature, to register leaks and to monitor the operation of the pneumatic components
How does a vapour-cycle machine cool the pneumatic flow?
A special cooling fluid is compressed and expanded in a closed circuit
The recirculation system…
Recirculates cabin air to reduce the pack airflow
In an ideal situation, what is the best condition for the aircraft structure with regard to pressurisation?
The best condition for aircraft structure would be no pressurisation during flight
Why would an OUTFLOW valve have 2 AC motors and 1 DC motor?
Each pressure controller can control its own AC motor and if AC is not available the DC motor can control the valve
What 2 conditions can cause an equipment cooling system override operation to happen?
Component failure or smoke detected
What will happen if cabin altitude reaches 15000ft?
Outflow valves automatically closes
What type of gyro would be used to indicate the aircraft’s altitude?
Vertical gyro
Modern flight data recorders…
Store the flight data from the last 25 hours of flight for accident investigation purposes
Vertical gyros have…
3 degrees of freedom with a vertical spin axis
What does the airspeed indicator indicate?
It shows the indicated airspeed (IAS) which is the reference for all aerodynamic parameters e.g. lift and drag
What does the inner loop of an auto pilot control?
It controls the altitude of the aircraft and is always active
Which signal is used to dampen Dutch roll oscillations?
Yaw rate
Which method is used to disconnect the auto-throttle system?
Pushing either throttle lever disconnect button
What is the VHF emergancy frequency?
121.5MHz
Which statement is true for ACARS?
It is used for manual and automatic data transfers between the aircraft and the ground in both directions
What does the 1KHz tone indicate on a HF system?
It indicates that the antenna coupler is tuning to the newly selected frequency
Which priority sequence is used in a Passenger Address (PA) amplifier?
- Cockpit crew
- Cabin crew
- Pre-recorded announcements
- Boarding music
How does DME measure distance?
The time between the interrogation and reply signal is proportional to the distance of the station
Which statement correctly describes the VOR principle?
The VOR receiver calculates the magnetic bearing from 2 signals transmitted by a ground station
What is the purpose of the 2 antennas fitted in an ADF system?
2 antenna signals are required to determine the correct direction
What indicates localiser deviation?
HSI and ADI
Why is an integral grey collar fitted to certain CBs?
To indicate that they must be pulled by maintenance personnel during maintenance work
Which statement is correct regarding the hot battery bus bar?
It is always directly connected to the battery
Why is an integral orange collar fitted to certain CBs?
To indicate that they must be pulled by flight crew in certain abnormal situations
Why must you never attempt to carry out too many APU starts immediately after one another?
It will overheat the battery and damage it
What should you do if the electrolyte used in a Ni-Cd battery comes into contact with human skin?
Rinse it immediately making sure you only use clean water
What does OVERDRIVE mean in relation to CSD operation?
The outspeed speed of the CSD is faster than the input speed
What does UNDERDRIVE mean in relation to CSD operation?
The input speed of the CSD is faster than the output speed
What is the main source of electrical power while the AC is on ground?
External power
What is the rudder attached to?
Vertical stab trailing edge
How many booster pumps are required per engine?
2
What is the size of a lightning hole?
1/4 inches
What is the distance between frames?
60 cm
What is the purpose of stringers?
Carry stresses induced by the fuselage
What is the sweep angle on modern jets?
30 degrees
What is the percentage that a plain flap increases lift by?
55%
What is the percentage that a slat increases lift by?
35%
What is the percentage that a split edge flap increases lift by?
65%
What is the percentage that a slotted flap increases lift by?
70%
What is the percentage that a fowler flap increases lift by?
95%
What is the minimum amount of hydraulic systems required on an AC?
2
What is cable tension regulated by?
A cable tension regulator
What are rudder pedals used for?
Rudder, brakes and nose gear steering
Which mode of refuelling can be carried out from the cockpit?
Automatic pressure refuelling
What does the jettison system do?
Dumps fuel in case of an emergency
What does the spring loaded check valve do in regards to refuelling?
Used to prevent leakage on refuelling coupling
What does a check valve do IAW hydraulics?
To allow fluid to only flow in one direction
What will be present on the fuel leak monitor if there is no leak?
Nothing
Where is the nacelle intake drain located?
In the lower wing section
What unit are hydraulics measured in on aircraft?
PSI
What is the purpose of a leak measurement solenoid valve in regard to the hydraulic system?
Shuts down hydraulic fluid when a leak is detected, closes the supply line
