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M11 > Mr Mech > Flashcards

Mr Mech Flashcards

1
Q

What are the flight controls for lift devices?

A
  • Slats (Leading edge devices)
  • Flaps
  • Speed Brakes
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2
Q

What happens to the strength of metallic structures when it is heated due to high speed condition of flight?

A

Decrease in strength

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3
Q

What are included in the primary flight controls?

A

Ailerons
Roll Spoilers
Elevators
Rudder

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4
Q

What limits the rudder deflection?

A

Airspeed

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5
Q

The Tab that deflects in the same direction as the control surface

A

Anti Balance Tab

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6
Q

What is the value of the critical mach number?

A

0.8

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7
Q

What is the value of the local mach number?

A

1

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8
Q

What forms at the leading edge when flight speed exceeds the speed of sound?

A

Bow wave

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9
Q

In Airbus 320 identification system, What is the reference point for Z Axis?
Reference point for Z Axis?

A

240 millimetres above the floor beams

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10
Q

These are vertical planes parallel to the body centerline plane

A

Body Buttock Lines (BBL)

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11
Q

Type of fuselage construction where the skin shares the load with the stringers, the frames and with an additional clip

Type of fuselage construction where the frames are joined together by stringers, and skin with clips

A

Semi-Monocoque Structure

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12
Q

This stress is a combination of compression and tension

A

Bending

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13
Q

These are able to carry torsion, compression and shear loads and also give shape to the wing and provide walls for the fuel tanks.

A

Ribs

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14
Q

What are the different functions of the air conditioning system?

A
  • Cools
  • Heats
  • Ventilates
  • Pressurizes
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15
Q

These are the electrical devices used in the cargo loading system in order to move the cargo containers and pallets inside the cargo compartment

A

Power Drive Units (PDU)

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16
Q

What regulates the supply of pressure corresponding to all flight altitudes?

A

Outflow Valve

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17
Q

A computer that regulates the amount of trim air that is mixed with the cold air that flows out through the pack

A

Zone Controller

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18
Q

A computer that regulates the temperature of the cold air that leaves the pack

A computer that regulates the temperature of the cold air that gives the pack

A

Pack Controllers

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19
Q

What are the sources of pneumatics?

A
  • Engine
  • APU (Auxiliary Power Unit
  • Ground Connectors (Ground Carts)
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20
Q

Aircraft Pneumatic Energy is used for:
*Engine Starting
*Cabin Pressurization and Air Conditioning
*Wing Anti-Icing
*Water Reservoir Pressurization
*Hydraulic Pressurization

A

True

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21
Q

What happens in supersonic flight?

A

Density Increases
Pressure Increases
Temperature Increases
Velocity Decreases

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22
Q

Why do we need to pressurize the cabin to a value which corresponds to an altitude of 8000feet (2400metres)?

A

Pressurization has to be a compromise between passenger comfort and structural design

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23
Q

Where are pack controllers located?

A

Avionics Compartment and/or Electric and Electronic Compartment

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24
Q

It is a computer with specified tasks. Its role is to monitor pressure and temperature, to register leaks, and to monitor the operation of the pneumatic components.

A

Pneumatic Controller

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25
Q

These are located on exterior surfaces of the fuselage, wing and tail section to drain any fluids overboard. These drains are always open

A

Drain Ports / Drain Mast

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26
Q

What are the different components of air cycle machine?

A

Compressor
Turbine
Fan

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27
Q

What is used to heat cargo compartment?

A

Hot Bleed Air
Electrical Heater

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28
Q

Air is removed from the lavatories and galleys by what?

A

Extraction Fan

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29
Q

If a fluid is ______it has the tendency to absorb water

A

Hydroscopic

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30
Q

They allow manual filling of the reservoir and other provide manual opening of cargo doors.

Used in manual cargo door operation

A

Fixed Displacement Pumps (FDP)

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31
Q

The shock struts operates harshly when there is

A

Too much oil

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32
Q

The result is a soft strut/shock strut when there is

A

Too much gas

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33
Q

A tire can be used approximately what?

A

150 landings and takeoffs

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34
Q

The fill and overflow valve will open when you pull the___

It retracts automatically when the actuator closes the valve.

A

T-Handle

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35
Q

These are used to seal where stroking or rotational movements occur.

A

Dynamic Seal

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36
Q

The flight crew safety harness is a

A

5 point type

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37
Q

The cabin crew safety harness is a

A

4 point type harness, single release

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38
Q

The low ambient air pressure gives enough differential pressure for the system to operate efficiently above an altitude of_____

An altitude pressure switch activates a vacuum blower below_____

A

16000 ft

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39
Q

What are the ways to control the cockpit seats?

A

Manually and Electrically

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40
Q

How do we operate bulk cargo door?

A

Manually operated and opens inward

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41
Q

When does ELT activates?

A

When submerged in water or When impact is detected

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42
Q

The secondary flight controls are consists of what?

What are the two sub-categories in the secondary flight control?

A

Lift devices and Trim systems

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43
Q

What are the main lift devices?

A

Flaps

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44
Q

There are 2 ways to reduce the wave drag. One is to use vortex generators and the other is to apply the

A

Area Rule

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45
Q

Area rule that has lesser wave drag

A

Waist Fuselage

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46
Q

A vertical plane at a right angle to the body centerline.

A

Body Station (B STA)

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47
Q

Fuselage construction made of members such as beams, struts, and bars to resist deformation by applied loads

A

Truss-type construction

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48
Q

What major zone is Powerplant?

A

400

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49
Q

Duplication of certain structural members to ensure that if one member failed, the other would assume the load of the failed member

A

Fail safe

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50
Q

What are the glass composition of the cockpit windows?

A

Thermally strengthened
glass and 2 inner chemically strengthened glass

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51
Q

Cooling device that is used in aircraft when engine bleed air is not available

A

Vapor Cycle Machine

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52
Q

Cooling device that is used in most iet aircraft

A

Air Cycle Machine

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53
Q

This system consists of Check Valve, Fan, and Air Filter

A

Recirculation system

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54
Q

It can supply fresh ambient air to the mixing unit when all packs fail during flight.

A

Emergency Ram Air Inlet

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55
Q

At what altitude the relief valve will open?

A

15000 ft

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56
Q

How much power supply does static inverter supplies to the razor outlet sockets?

A

110V AC , 60Hz

57
Q

Cylinder bottle of gaseous oxygen

A

PSU

58
Q

What is the flashpoint of fuel?

A

The lowest temperature at which the fuel creates just enough vapors to build up a fuel/ air mixture that can be inflamed.

59
Q

A type of drain valves where a drain line runs from the lowest point in the fuel tank to the valve housing.

A

Indirect drain valves

60
Q

A refueling mode that is an alternative procedure if electrical power to the refueling valves is not available.

A

Override mode

61
Q

It is an area rule where there is a large increase in wave drag in transsonic region

A

Old Military Aircraft

62
Q

This means that the brakes on the left main gear wheels and the brakes on the right main gear wheels can be operated separately.

A

Differential Braking

63
Q

Supersonic airflow passes through a shockwave the density increases, the pressure increases, the temperature increases and the velocity decreases.

A

Supersonic flight

64
Q

It is the wing up and wing down motion around the longitudinal axis.

A

Roll

65
Q

It is the nose up and down motion around the lateral axis

A

Pitch

66
Q

It is the nose left and nose right motion around the vertical axis

A

Yaw

67
Q

Rudder load relief devices prevent structural damage by limiting the maximum rudder deflection in accordance with what?

A

Airspeed

68
Q

The speed brakes operate___

A

symmetrically on each wings

69
Q

Usually, they are numbered from forward to aft, from inboard to outboard, and from bottom to top.

A

Zones

70
Q

A design principle requires that major structural elements are replaced after a fixed number of flight cycles.

A

Safe life

71
Q

Maintains shape of the fuselage and carry the loads.

A

Frames

72
Q

Part of the door structure that provides additional rigidity

A

Intercostals

73
Q

Normal flight cabin pressure for sufficient oxygen and maximum differential pressure of structural design at altitude.

A

8000 ft

74
Q

At what cabin altitude will oxygen masks automatically released from the passenger cabin ceiling?

A

14000 ft

75
Q

This section of the rack houses all the distribution circuit breakers protecting the electrical lines supplying the systems

A

Rack Upper Section

76
Q

What are installed on the seat tracks of the cabin floor structure?

A

Passenger Seats

77
Q

These fittings at the front and the rear legs hold the seats in position.

A

Quick Release Fittings

78
Q

What are the main galley attachment points on the floor?

A

Hard Point and/or
Seat rail attachments

79
Q

What are the main galley attachment points at the upper fuselage structure?

A

Tie Rod attachments

80
Q

What are the components used to move the ULD?

A

Ball Mats
Roller Tracks
Power Drive Units (PDU)

81
Q

It has a small electric motor that initiates a vibration of the control column to alert the pilot when the A/C approaches stall condition.

A

Stick Shaker

82
Q

In this system, the greater the number of connections, the greater the mechanical play, the less accurate the transmission.

A

Cable System

83
Q

These solvents should not be used for cable cleaning, because they remove grease from strands inside the cable.

A

MEC
PER

84
Q

It has a heat shrinkable sleeve, which prevents adjustment of the end fittings

A

Non-Adjustable Rods

85
Q

Used to transmit torque for linear movement

A

Torque Shaft

86
Q

Used to transmit torque for rotary movement.

A

Torque Tube

87
Q

This changes hydraulic pressure into mechanical force

A

Power Section

88
Q

It is used to change the hydraulic flow to the cylinder to produce an extend or a retract motion

Sometimes called a metering valve

A

•Distribution Control Valve

89
Q

The servo control unit 2 main operating modes

A

Damping mode
Control or Active Mode

90
Q

It is used as a gust dumper for the flight control surface when the A/C is on ground.

A

Damping Mode

91
Q

It uses hydraulic power to move the surface, but the hydraulic power does not come from an external system. - An electro motor driven hydraulic pump

A

Electro hydraulic Actuator (EHA)

92
Q

It is installed to provide the pilot with an artificial feel of the air load

A

Feel unit

93
Q

Consist of an electric motor operated screw jack

A

Trim Unit

94
Q

Pressure produced by static or nearly static fluids

A

Hydrostatic pressure

95
Q

Pressure produced by moving liquid ideally with no internal friction.

A

Hydrodynamic pressure

96
Q

Due to design constraints or safety requirements some drain valves are not at the lowest point of a fuel tank. On these valves a drain line runs from the lowest point in the fuel tank to the valve housing

A

Indirect Drain Valves

97
Q

It is the most commonly used fuel type for jet engines in Europe.

It has a high flash point of +38°C and a low freezing point of -47°C

A

Jet A1

98
Q

It is the most commonly used fuel type for jet engines in America.

It has a high flash point of +38°C and a low freezing point of -40°C

A

Jet A

99
Q

It is the mainly used for military jet engines

It has a very low flash point of -20°C and a very low freezing point of -60°C

A

Jet B

100
Q

It has a very high flash point of +65°C and a relatively low freezing point of -48°C

A

JP 5

101
Q

It is used where two plates join

A

Fillet seal

102
Q

It is used to cover a nut or a bolt

A

Cap Seal

103
Q

It is indicated as a mass, in kilograms or Ton

A

Fuel Quantity

104
Q

Installed vertically in each tank and reach the bottom of the tank to the top.

A

Fuel Quantity Probes

105
Q

Used to measure fuel temperature

A

Thermistor

106
Q

It surrounded the tube housing and is used to determine the fuel level in the tank

A

Float

107
Q

It has a calibrated rod which reaches into the fuel tank. They are locked at the lower wing surface by locking pins

A

Drip Sticks

108
Q

These sticks allowed the measurement of the fuel level without the disadvantage of fuel dripping out of the drip holes

A

Manual Magnetic level indicators

109
Q

Auxiliary source used for the blue hydraulic system

A

RAT

110
Q

It is used to make a seal between the environment and the fluid pressure inside.

A

Packing

111
Q

Also called seals, prevent leaks from the component housings and provide a seal between 2 different fluid pressures within a component

A

Packings

112
Q

Its characteristic is mineral oil and red color

A

Skydrol and Hyjet

113
Q

Its characteristic is synthetic oil and purple color

A

MIL-H-5606

114
Q

Used to seal against steady or pulsating pressure

A

Static Seals

115
Q

In normal operating position, it allows pressurized fluid to flow the user via port 1. Can be closed via cockpit switch in order to test the internal leakage of the hydraulic component. When closed users no longer supplied by port 1, port 2 becomes fluid supply.

A

Leak Measurement Solenoid Valve

116
Q

Its purpose is to close the hydraulic circuit to different users when there is very high demand in the system.

A

Priority Valve

117
Q

It combines all of the return lines into a single line going back to the reservoir.

A

LP (Low Pressure) Manifold

118
Q

It distributes pressure fluid to the users.

A

HP (High Pressure) Manifold

119
Q

It transmits hydraulic power through the rack and pinion mechanism to steer the nose gear wheels.

A

Steering actuating cylinder

120
Q

It occurs when main gears resist the turn

A

Scrubbing

121
Q

It opens forward doors that are mechanically locked in the closed position by a door uplock.

A

Ground Control Handle

122
Q

It receives signals about the position of the doors and the gears from proximity sensors and sends a command signal to the selector valve manifold

A

L.G.C.I.U (Landing Gear Control
Interface Unit)

123
Q

This can be used to manually override the solenoid if there is a failure in the system. Allows you to select the UP position of the control lever at any time, even when the aircraft is on the ground.

A

Lock Override Pushbutton

124
Q

It gives a visual indication of the overall wear of the heat pack.

A

Wear Indicator Pin

125
Q

Anti skid system automatically switches itself off when the aircraft speed decreases below a level of

A

10 Knots

126
Q

It engage when the inner cylinder extends to make sure that the nose gear is in a straight and forward position during retraction

A

Centering Cams

127
Q

May be used to lock the downlock actuator when the aircraft is on the ground. Must be removed before flight.

A

Ground safety locks, or sleeves

128
Q

It give signals when the landing gear doors are in an open position.

A

Proximity Sensors

129
Q

Transmit vertical loads and drag loads into the airframe without transferring torque to the structure and to the outer cylinder during structural deflections.

A

Spherical Bearings

130
Q

Supports the aircraft on the ground and protects the aircraft structure by absorbing the shock on landing

A

Shock strut

131
Q

It gives lateral support to the shock strut. Named, side stay or side brace.

A

Side Strut

132
Q

It stabilizes the shock strut in fore and aft directions, and locks the nose gear in the down and up position, named drag stay or drag brace.

A

Drag Strut

133
Q

Attached to the drag strut assembly. It gives secondary support for the down and locked position of the nose gear. It controls the alignment of the folding drag strut

A

Lock Stay

134
Q

Waste water system directs the waste water out of the aircraft through what?

A

Drain Masts and Drain Lines

135
Q

Altitude where there is no need of vacuum blower flushing

A

16000 ft

136
Q

Check valve that prevents back flow of water from the toilet into the potable water system.

A

Anti Siphon Valve

137
Q

It distributes water to the toilet, to the water heater, to the mixer valve and via the faucet into the washbasin

A

Header

138
Q

Also named liquid
separator. Removes moisture and waste particles from the waste tank air before it is vented overboard by the vacuum blower.

A

Water Separator

139
Q

The pneumatic ducts are monitored by a

A

Leak Detection System

M11 (14 decks)

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