Main purpose of a frise aileron?
Which of the following is a primary function of a flap
- To alter a lift of an airfoil
Engine Bleed Air used for air conditioning and pressurization in turbojet airplanes is usually taken from the?
- Compressor SECTION
If the control column/control sick in the cockpit is moved forward and to the left
- Left Aileron moves up, right aileron moves down, elevator up
Which of the following is an example of a secondary flight control?
- SPoiler
If an aircraft is yawing to the left, where would you position the trim tab on the rudder
So to the left, moving the rudder right???
The left wing of ascertain airplane is flying low. The aileron trimmer control to the left aileron trim tab in the cockpit would be?
- Moved down causing the left aileron to move up
On an aircraft fitted with elevons in normal flight, if a column is moved forward, the elevons will.
- Both DOWN
Where would you position the trim tab on the rudder if the aircraft is yawing to the left?
- To the center
Ailerons control the aircraft in the:
- Lateral
A control surface is provided with aerodynamic balancing to:
- ASSIST THE PILOT IN MOVING THE CONTROL
Cabin air for modern aircraft usually taken from?
- The low pressure compressor and from the high pressure compressor if necessary
The water extractor/separator is usually?
- Fitted prior the duct relief valve to ensure that is not liable to freeze up
- Cold air unit
Aerodynamic Balance:
-Will reduce aerodynamic loading
In an engine bleed air supply system ____ air at _____ Pressure is supplied from the engine ___ via a ___ val
Hot – high – compressor – shutoff
Mass airflow to the cabin is?
Proportional
Which of the following types of flaps will create an increase in the wing camber and the wing area?
-Fowler
What is the main purpose of the slot on the wing?
-Act as venturi, accelerate the air and re-energise boundary layer
When a leading edge flap is fully extended, it forms a slot. What is the purpose of the slot in the wing?
-To re-energize the boundary layer
An elevator provides aircraft control about the?
Lateral axis
On an aircraft with an all-moving tailplane, pitch up is caused by?
Decreasing tailplane incidence
Control surface flutter can be reduced by using?
Mass balancing
How do a split flap increases the lift for a given wing?
By increasing the angle of attachment of the lower hinged portion
When air is pressurized by an engine driven compressor, it is also?
Heated
Aircraft wing spoilers, when used asymmetrically, are associated with what flight control?
Rudder
Elevators
Trim tabs
Ailerons
During flight, an airplane is yawing to the left. The aircraft would have a tendency to fly
Left Wing Low
What is the main purpose of a balance tab?
It assists the pilot to move the controls
The fin helps to give?
Directional stability about the normal axis
Where would you move the left aileron trim tab if the aircraft is flying with a low left
Up
What would happen when the training edge flaps are lowered?
The aircraft will pitch nose down
A servo tab is operated:
Both A and B are correct
Aerodynamic balance of a control surface may be achieved
By horn at the extremity of the surface forward of the hinge line
Ruddervators when moved, will move:
Either opposite each other or together, depending on the selection
What is a Krueger flap?
A leading edge flap which hinges forward
The balance tab is an auxiliary surface fitted to a main control surface
Operating automatically to assist the pilot in moving the controls
The cabin heating supply in a heavy jet transport aircraft is obtained from?
Hot air coming from the engine’s compressors
“exhaust pipe which allows ram air to come into close contact with the hot exhaust pipe to provide hot air for heating the cabin.” combustion heaters
Hot air coming from the engine’s compressor
In the pneumatic supply system of a modern transport aircraft, the regulation of air pressure is required. THis pressure regulation occurs just before the manifold by the?
Low pressure bleed air valve
The advantages of a cable control system are:
(1) light, very good strength to weight ratio
(2) easy to route through the aircraft
(3) less prone to impact damage
(4) takes up less volume
(5) less bolted joints
- All
Which of the following statements would be more correct in regards to an auxiliary power unit?
The point on an airfoil section through which lift acts is the?
⇒ Center of pressure v good
During a normal pressurized cruise, the discharge valve position is?
-At a position pre-set before takeoff – PARtially OPEN sabi ni quizlet
In a level presssurized flight, what will be the opration of the outflow valve?
⇒ It adjusts to provide constant flow and is normally almost closed
The purpose of fairleads in a cable control system is to? – ano sagot dito kahit ano?
- To attach the cables to chain drives
- Alter the of deflection of the cables
- To keep the cable straight and clear of structure
When you are about to inspect a control cable turnbuckle on an aircraft for its proper installation, which of the following things need to determined?
- No more than four threads are exposed on either side of the turnbuckle barrel
- The terminal end threads are visible through the safety hole in the barrel
- The safety wire ends are wrapped a minimum of four turns around the terminal ends shanks
- All answers are correct
Bleed air used for pneumatic source and engine anti-icing is provided by?
- The turbine stages
- The compressors
- The combustion chambers
- The bleed valves
Bleed air is produced by the compressor of engine or APU so baka compressor here
In large transport aircraft main wheel bays and nose wheel bays are?
- Conditioned
- Pressurized
- Unpressurized
- Different with the main wheel bay being unpressurized and the nose wheel bay pressurized
Which of the following statements would be more correct in regards to an auxiliary power unit?>
= Auxiliary power units provide electric, pneumatic and hydraulic power for ground and aerial use.
How is the charge air coiled in a bootstrap turbo-compressor system?
- By expanding over turbine driving compressor
- Via an air colled radiation
- By expanding over turbine
- By passing it through the fuel heater
A line drawn from the leading edge to the trailing of an airfoil section and equivalent at all points from the upper and lower contour is called?
=Chord Line
On what principle does the vapor cycle colling system work on an aircraft?
Choices
- vapor into liquid
- cold gas into hot gas
- vapor into gas
- liquid into vapor
When you are about to inspect a control cable turnbuckle on an aircraft for its proper installation, which of the following things need to determined?
-the safety wire ends…
What is differential control on an aileron system
-the down travel…
How is the charge air colled in a bootstrap turbo-compressor system
-by expanding over turbine driving compressor
The chord of the wing of an aircraft is measured from?
-leading edge to trailing edge
Turbo cooler system
To roll the aircraft to the right:
- The aileron control is moved to the right, the right elevator moves up and the left aileron moves down.
- The aileron control is moved to the right, the right aileron moves up and the left aileron moves down
- The aileron control is moved to the left, the right aileron movies up and the left aileron moves down
- The rudder control is moved to the right, the right aileron moves up and the left aileron moves down
What would happen when the trailing edge flaps are lowered?
Pitch nose down
In a flight control cable system, a tension regulator of a large all-metal aircraft is used primarily to?
- Retain a set of tension.
To yaw the aircraft to the right
The right rudder pedal is pushed forward and the rudder deflection moves to the right.
:
What is lift?
The aerodynamic force which acts perpendicular to the relative airflow.
Cabin air for modern aircraft is usually taken from?
-the low pressure compressor
-the high pressure compressor
-the low pressure and the high pressure compressor if necessary
-the second fan stage
The angle between the chord line of the airfoil section and the longitudinal axis of the aircraft is known as?
-Dihedral angle
-Anhedral angle
-Angle of attack
-Angle of incidence
On a fixed-wing aircraft, elevators are used to provide rotation about the?
- Lateral axis
- Normal Axis
- Longitudinal Axis
- Vertical Axis
On an airfoil section, the force of lift acts perpendicular to, and the force of drag acts parallel to the:
- flight path
- Airfoil section upper surface
- Chord line
- Longitudinal axis
The maximum altitude without oxygen at which flying efficiency is not seriously impaired is?
10, 000 ft
Which of the following flight control system is the differential control associated?
- AILERONS
Air for air conditioning and pressurization is taken from
- The engine by-pass duct of thrust reverser by-pass duct
- The engine compressor or ram turbine
- The engine turbine or cabin compressor
- The engine compressor or cabin compressor – andoks
If the control column of a fixed wing aircraft is moved forward and to the right, the left aileron will move?
- Up and the elevator will move up
The angle between the chord line of an airfoil section and the relative wind is known as the angle of?
- Attack?
- Sweep back
- Lift
- Incidence
The stability of an aircraft about the axis which runs parallel to the line of flight is referred to as?
LATERAL STABILITY
What is the purpose of spring tabs or servo tabs in an aircraft?
- Contribute to the static balance of the control surface.
- All answers are correct.
- Assist the pilot in moving the control surfaces
- Make an in-flight trim adjustments as possible.
What will happen if the right wing of a given fixed-wing aircraft is not properly rigged to a greater angle of incidence that designated in the manufacturer’s specifications, what will be its effect?
- Airplane to be off balance both laterally and directionally sabi ni QUIZLETOOO
- Airplane to pitch and roll about the lateral axis
- Right wing to have both an increased lift and a decreased drag
- All answers are correct.
In a flight control system that uses control cables, how are changes in the direction of a control cable accomplished?
PULLEYS
When a specific airplane has a tendency to gradually increase a pitching moment that has been set into motion, it has a
- poor longitudinal stability
In a control cable system, fairleads should never deflect the alignment of a cable more than
- 3 Degrees
A line drawn from the leading edge to the trailing edge of an airfoil section and equivalent at all points from the upper and lower contour is called?
- Mean Camber line
In a large transport aircraft, main wheel bays and nose wheel bays are?
- Conditioned
- Pressurized
- Unpressurized
- Different, with the main wheel bay being unpressurized and the nose wheel bay pressurized
What is maximum differential pressure?
- It is the absolute pressure the cabin pressure ducting is designed to carry.
- It is the pressure loss over a given time limit.
- It is the maximum authorized pressure difference between the inside of the fuselage and the atmospheric ambient pressure.
- It is the absolute pressure provided by the vacuum pump.
A fixed-wing is controlled directionally about its vertical axis by the?
-Flaps
-Rudder
-Ailerons
-Elevators
The movement of a fixed-wing aircraft along its lateral axis is also considered as a movement:
- About the longitudinal axis controlled by the elevator
- About the lateral axis controlled by the rudder
- About the lateral axis controlled by the ailerons
- About the longitudinal axis controlled by the aileron
The cabin discharge valve in pneumatic system is supplied with? cabin and static pressure
- Cabin pressure and static pressure
- Cabin pressure only
- Cabin pressure, static pressure and air speed information
- Air data computer output information
On an
What is the purpose of wing slats in an aircraft
- All of the above
Air cabin discharge valve is supplied with
AIR DATA COMPUTER OUTPUT INFO
In a pressurized aircraft, when would the negative diffential limit be reached or exceeded?
- Rapid descent when aircraft descends below cabin altitude.
To maintain a steady and constant airflow regardless of altitude or cabin pressure:
A mass flow controller is fitted.
When an elevator trim tab system is improperly rigged, it will affect the balance of the airplane about its
- vertical axis
- longitudinal axis
- lateral axis
- diagonal axis
A ram air turbine used to provide?
Emergency hydraulic power for the primary flight controls along with possible emergency electrical power.
A humidifier is fitted to?
- Increase moisture . . .
The cabin discharge valve in pneumatic system is supplied with?
- Cabin pressure, static pressure and air speed information.
- Cabin pressure only.
- Cabin pressure and static pressur
- Air data computer output information
What is the function of a heat exchanger?
- It mixes the various vapors inside the heat exchanger.
- It combines the ram and charge air.
- It removes the static charge.
- It passes charge air through ducts and cool air around the ducts.
When air is pressurized, the percentage of oxygen:
- Increases
- Remains the same
- Decreases
- Has no change at all
What is the function of a heat exchanger?
If the cockpit control for the elevator trim tab is rotated towards the nose down position, the trailing edge of the trim tab will move _________, regardless of the position of the elevator.
–upward
For a given fixed wing aircraft, when it has good longitudinal stability it also has a minimum tendency to
- Pitch
- Longitudinal stability is the quality that makes an aircraft stable about its lateral axis. It involves the pitching motion as the aircraft’s nose moves up and down in flight
- roll
- slip
- yaw
A design having their elevators in ahead of the wings and at the same time contributes to lift.
- swept front design
- swept back design
- lifting canard
- control canard
What system is installed to control air conditioning?
- Impingement type dehydrator and humidifier.
- Dehydrator only.
- Emulsifier and water extractor.
- Humidifier only.
An airfoil section is designed to produce lift.
- Higher air pressure at the leading edge than at the trailing edge.
- Negative air pressure below and a vacuum above the surface.
- Vacuum below the surface and greater air pressure above the surface.
- Higher air pressure below the surface and lower air pressure above the surface.
What will happen if the right wing of a given fixed-wing aircraft is not properly rigged to a greater angle of incidence than designated in the manufacturer’s specifications, what will be its effect?
- Airplane to be off balance both laterally and directionally.
Airplane to pitch and roll about the lateral axis.
- Right wing to have both an increased lift and a decreased drag.
All answers are correct.
An anti-balance tab is
- Used to give more feel to the controls.
- Used for trimming the aircraft.
- Used to relieve stick loads.
- All of the above.
If the control column of a fixed wing aircraft is moved rearward to the right, the right aileron will?
- Down and the elevator will move up
- Up and the elevator will move up
- Down and the elevator will move down
- Down and the elevator will move up
In a turbo cooler system, the cooling air is
- Cabin air
- Engine bypass air
- Ram air
- Compressor air
A fixed-wing aircraft is controlled directionally about its vertical axis by the
-RUDDER
The left wing of a certain airplane is flying low. The aileron trimmer control to the left aileron trim tab in the cockpit would be?
- Moved up causing the left aileron to move up
- Moved up causing the left aileron to move down hi bins
- Moved down causing the left aileron to move down
- Moved down causing the left aileron to move up
In the pneumatic supply system of a modern transport aircraft, the regulation of air pressure is required. This pressure regulation occurs just before the manifold by the?
- Low pressure bleed air valve
- Fan bleed air valve
- Intermediate pressure check valve
- High pressure bleed valve
What is a Krueger flap?
- A leading edge slat which extends forward
- A leading edge flap which hinges forward
- A flap which extends rearwards but lower
- A flap which extends rearwards but does not lower.
If an aircraft is yawing left, where would you position the trim tab on the rudder?
- To the left wing, moving the rudder
- No movement at all
- Either left or right
- To the right, moving the rudder left.
The air generally obtained from the engine used for air conditioning is essentially?
- high pressure, high volume
- low pressure, low volume
- low pressure, high volume
- high pressure, low volume
A fixed-wing aircraft is controlled directionally about its vertical axis by the?
- Flaps
- Rudder
- Ailerons
- Elevators
What is the main purpose of a frise aileron?
- increase drag on the up going wing
An airfoil section is designed to produce lift resulting from a difference in the:
Higher air pressure below the surface and lower air pressure above the surface.
A fixed-wing aircraft is controlled directionally about its vertical axis by the?
Rudder
In a modern jet aircraft, from where is the air or pneumatic source for air conditioning obtained?
- From the nozzle guide vanes.
- From the LP and HP compressors as required.
- From ram supply.
- From a stored gaseous source.
On a fixed-wing aircraft, elevators are used to provide rotation about the?
Longitudinal
What is the main purpose of a balance tab?
- It assists the pilot to move the controls.
- It effectively increases the area of the control surface.
- It gives more feel to the controls.
- It is used to trim the appropriate axis of the aircraft