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Questions and Answers
What are the knowledge level indicators defined as in the context of Category A, B1, B2, and C Aircraft Maintenance Licence?
What are the knowledge level indicators defined as in the context of Category A, B1, B2, and C Aircraft Maintenance Licence?
LEVEL 1, LEVEL 2, LEVEL 3
What is the main objective of LEVEL 1 knowledge?
What is the main objective of LEVEL 1 knowledge?
- To be familiar with basic elements of the subject (correct)
- To interpret results from various sources
- To use mathematical formulae
- To combine and apply separate elements of knowledge
In LEVEL 2 knowledge, applicants should be able to give a detailed description of the subject.
In LEVEL 2 knowledge, applicants should be able to give a detailed description of the subject.
False (B)
The applicant should understand and be able to use _ formulae related to the subject in LEVEL 3 knowledge.
The applicant should understand and be able to use _ formulae related to the subject in LEVEL 3 knowledge.
What are the four regions the atmosphere is classified into based on temperature variation with altitude?
What are the four regions the atmosphere is classified into based on temperature variation with altitude?
Which layer of the atmosphere contains all of the world's weather?
Which layer of the atmosphere contains all of the world's weather?
The weight of the atmosphere on Earth's surface causes an air pressure of about _____ psi.
The weight of the atmosphere on Earth's surface causes an air pressure of about _____ psi.
Atmospheric pressure decreases with height above the Earth's surface.
Atmospheric pressure decreases with height above the Earth's surface.
What does the International Standard Atmosphere (ISA) provide for aircraft and engine performance calculations?
What does the International Standard Atmosphere (ISA) provide for aircraft and engine performance calculations?
What are the main components of a pitot static system?
What are the main components of a pitot static system?
Which instruments are part of the pitot static system?
Which instruments are part of the pitot static system?
The pitot static system is used to measure only static pressure.
The pitot static system is used to measure only static pressure.
What type of bellows is used in a manifold pressure gauge to reference measured pressure to a vacuum?
What type of bellows is used in a manifold pressure gauge to reference measured pressure to a vacuum?
Instrument sensing elements are not affected by temperature changes.
Instrument sensing elements are not affected by temperature changes.
What metals are bonded together in a bimetallic strip?
What metals are bonded together in a bimetallic strip?
The system of ports and tubing on the aircraft which supplies pitot and static pressure for the instruments is called the __________ system.
The system of ports and tubing on the aircraft which supplies pitot and static pressure for the instruments is called the __________ system.
What is the purpose of an altimeter in an aircraft?
What is the purpose of an altimeter in an aircraft?
Which barometric code is used to set the altimeter reading to zero feet on landing and take-off?
Which barometric code is used to set the altimeter reading to zero feet on landing and take-off?
Airspeed equals ground speed in all flight conditions.
Airspeed equals ground speed in all flight conditions.
An airspeed indicator provides information displayed in ________.
An airspeed indicator provides information displayed in ________.
Match the following airspeed indicator elements with their descriptions:
Match the following airspeed indicator elements with their descriptions:
What is the ratio of the aircraft's true airspeed (V) to the speed of sound (α) known as?
What is the ratio of the aircraft's true airspeed (V) to the speed of sound (α) known as?
What is the Mach number at which supersonic airflow first occurs on an aircraft?
What is the Mach number at which supersonic airflow first occurs on an aircraft?
Maximum Operating Mach Number (Mmo) value is determined to avoid potential loss of control of a _____ aircraft.
Maximum Operating Mach Number (Mmo) value is determined to avoid potential loss of control of a _____ aircraft.
Match the following indicators with their correct descriptions:
Match the following indicators with their correct descriptions:
What will a partial blockage in the static line cause?
What will a partial blockage in the static line cause?
What effect does a pitot tube blockage have on the airspeed indicator?
What effect does a pitot tube blockage have on the airspeed indicator?
Pitot line blockages have no effect on the altimeter or vertical speed indicator.
Pitot line blockages have no effect on the altimeter or vertical speed indicator.
In an unpressurised aircraft, a static leak may cause a standing error on the altimeter and airspeed indicator and has a minimal effect on the __________ indicator.
In an unpressurised aircraft, a static leak may cause a standing error on the altimeter and airspeed indicator and has a minimal effect on the __________ indicator.
Match the precautionary measure with its description:
Match the precautionary measure with its description:
What are the three knowledge levels defined for Category A, B1, B2, and C Aircraft Maintenance Licence?
What are the three knowledge levels defined for Category A, B1, B2, and C Aircraft Maintenance Licence?
What is the main objective of Level 1 knowledge?
What is the main objective of Level 1 knowledge?
What is the main objective of Level 2 knowledge?
What is the main objective of Level 2 knowledge?
What is the main objective of Level 3 knowledge?
What is the main objective of Level 3 knowledge?
What are the three main instruments in a pitot static instrument system?
What are the three main instruments in a pitot static instrument system?
Which component of the pitot static system measures the aircraft's speed through the air?
Which component of the pitot static system measures the aircraft's speed through the air?
The pitot tube measures static pressure.
The pitot tube measures static pressure.
What are the regions of Earth's atmosphere classified based on?
What are the regions of Earth's atmosphere classified based on?
In which layer of the atmosphere do virtually all weather phenomena take place?
In which layer of the atmosphere do virtually all weather phenomena take place?
The standard set of conditions used in aviation for performance calculations is known as the International Standard Atmosphere.
The standard set of conditions used in aviation for performance calculations is known as the International Standard Atmosphere.
The amount of pressure change the pitot static instruments are required to measure is in the region of only around _ psi overall.
The amount of pressure change the pitot static instruments are required to measure is in the region of only around _ psi overall.
Match the pressure sensing device with its description:
Match the pressure sensing device with its description:
What type of bellows is a manifold pressure gauge typically using?
What type of bellows is a manifold pressure gauge typically using?
What is the purpose of using bimetallic strips?
What is the purpose of using bimetallic strips?
A cold climate affects the malleability of an aneroid capsule used in instruments.
A cold climate affects the malleability of an aneroid capsule used in instruments.
The pressure-sensing element of an altimeter compensates for changes in ambient temperature with a bimetallic ______ bracket.
The pressure-sensing element of an altimeter compensates for changes in ambient temperature with a bimetallic ______ bracket.
Match the following atmospheric pressure measuring elements with their functions:
Match the following atmospheric pressure measuring elements with their functions:
What are the effects of a partial blockage in the static line?
What are the effects of a partial blockage in the static line?
How does a pitot line blockage affect the airspeed indicator?
How does a pitot line blockage affect the airspeed indicator?
A static line leak has no effect on the altimeter in a pressurized aircraft.
A static line leak has no effect on the altimeter in a pressurized aircraft.
How does reduced pressure in the altimeter case affect the aneroid capsules?
How does reduced pressure in the altimeter case affect the aneroid capsules?
Altimeters are calibrated to the standard atmosphere.
Altimeters are calibrated to the standard atmosphere.
What does the QFE code refer to?
What does the QFE code refer to?
Indicated airspeed is measured in ______________.
Indicated airspeed is measured in ______________.
What is the Mach number defined as?
What is the Mach number defined as?
What is the Critical Mach Number (Mcrit)?
What is the Critical Mach Number (Mcrit)?
A Machmeter displays the Mach number indicated by the ratio V/α, where V is the aircraft's true airspeed and α is the speed of __________ at the aircraft's altitude.
A Machmeter displays the Mach number indicated by the ratio V/α, where V is the aircraft's true airspeed and α is the speed of __________ at the aircraft's altitude.
Vertical Speed Indicators (VSI) are designed to measure variations in static pressure to indicate the rate of altitude change.
Vertical Speed Indicators (VSI) are designed to measure variations in static pressure to indicate the rate of altitude change.
Study Notes
Category B1 Licence
- Relates to CASA B1-11f, covering Aeroplane Systems, including Instruments and Avionics
Knowledge Levels for Category A, B1, B2, and C Aircraft Maintenance Licences
- Knowledge levels are indicated by numbers (1, 2, or 3) against each applicable subject for categories A, B1, and B2
- Category C applicants must meet either the category B1 or category B2 basic knowledge levels
Level 1 Knowledge
- Familiarity with basic elements of the subject
- Ability to give a simple description of the subject using common words and examples
- Ability to use typical terms
Level 2 Knowledge
- General knowledge of theoretical and practical aspects of the subject
- Ability to apply knowledge
- Objectives:
- Understand theoretical fundamentals of the subject
- Give a general description of the subject using typical examples
- Use mathematical formulae in conjunction with physical laws
- Read and understand sketches, drawings, and schematics
- Apply knowledge in a practical manner using detailed procedures
Level 3 Knowledge
- Detailed knowledge of theoretical and practical aspects of the subject
- Capacity to combine and apply separate elements of knowledge in a logical and comprehensive manner
- Objectives:
- Know the theory of the subject and interrelationships with other subjects
- Give a detailed description of the subject using theoretical fundamentals and specific examples
- Understand and use mathematical formulae related to the subject
- Read, understand, and prepare sketches, simple drawings, and schematics
- Apply knowledge in a practical manner using manufacturer's instructions
- Interpret results from various sources and measurements, and apply corrective action where appropriate### Instrument Systems Pitot Static
- Pitot static systems measure air pressure to provide altitude, airspeed, and vertical speed data to pilots.
The Atmosphere and Atmospheric Standards
- The atmosphere is a layer of gases surrounding the Earth.
- Atmospheric pressure decreases with altitude.
- The atmosphere is divided into regions: troposphere, stratosphere, mesosphere, thermosphere, and exosphere.
- The standard atmosphere is a model used to standardize pressure, temperature, and density.
Pressure Sensing Devices
- Aneroid capsules and bellows are used to measure pressure changes.
- Bellows are flexible tubes that expand or contract with pressure changes.
- Temperature compensation is necessary to ensure accurate pressure readings.
- Bimetallic strips and temperature compensating U-shaped brackets are used for temperature compensation.
Pitot Static Systems
- Pitot probes measure impact pressure.
- Static ports measure static pressure.
- The difference between impact and static pressures gives airspeed.
- Pitot static systems are used in aircraft to provide altitude and airspeed data.
Altimeters
- Altimeters measure aircraft altitude.
- Non-sensitive altimeters measure altitude directly from static pressure.
- Sensitive altimeters measure altitude using a pressure-sensitive diaphragm.
- Barometric adjustment knobs are used to adjust for changes in atmospheric pressure.
Airspeed Indicator
- Airspeed indicators measure airspeed using pitot static pressure.
- Airspeed indicators have a pitot pressure inlet and a static pressure port.
- Maximum allowable airspeed indicators have a red line to indicate maximum safe speed.
Effects of System Blockages
- Static line blockage causes incorrect altitude readings.
- Pitot line blockage causes incorrect airspeed readings.
- System leaks can cause incorrect readings and instrument failure.
Pitot Static System Precautions
- Pitot probes must be kept clean and free of debris.
- Static ports must be kept clean and free of debris.
- System leaks must be checked regularly.
- Drain holes and water traps are used to prevent water from entering the system.### The Atmosphere and Atmospheric Standards
- Air is a mixture of gases in the following proportions:
- Nitrogen (78.08% by volume)
- Oxygen (20.95% by volume)
- Argon (0.93% by volume)
- Carbon dioxide (0.03% by volume)
- Other gases (0.01% by volume)
- The atmosphere consists of a layer of air many kilometers thick, with a weight that causes air pressure of about 14.7 psi at the earth's surface.
- Atmospheric pressure progressively reduces with height (altitude) above the earth.
Regions of the Atmosphere
- The atmosphere is classified into four regions based on the variation of temperature with altitude:
- Troposphere
- Stratosphere
- Mesosphere
- Thermosphere
- Aircraft fly only in the troposphere and the lowest part of the stratosphere.
Troposphere
- The troposphere is the lowest layer of the atmosphere, extending from sea level to the tropopause.
- All of the world's weather is contained in the troposphere.
- The temperature in the troposphere decreases rapidly with altitude, clouds form, and there may be much turbulence.
The Standard Atmosphere
- The standard atmosphere is a set of standard conditions with which observed readings can be compared.
- The standard atmosphere is also known as the International Standard Atmosphere (ISA) or ICAO Standard Atmosphere.
Pressure Sensing Devices
- Aneroid capsules:
- Measure very small changes in pressure with reference to a vacuum.
- Maximum operating range is 0 psia or a vacuum up to about 17 psia.
- Used to measure absolute pressure.
- Bellows:
- Operate similar to an aneroid capsule, but are generally not evacuated and are made of more rugged material.
- Used to measure high, low, or differential pressure.
Pitot Static Systems
- The pitot static system is a system of ports and tubing on the aircraft that supplies pitot and static pressure for the instruments.
- The pitot tube measures the ram pressure of the airstream.
- Static ports measure static pressure and are not affected by the speed of the aircraft.
Altimeters
- An altimeter measures the prevailing atmospheric pressure, which surrounds the aircraft, and displays this pressure in units of feet above sea level.
- Elements of an altimeter:
- Aneroid capsules or bellows
- Linkages and gears
- Instrument pointer
- Temperature compensation mechanisms
Category B1 Licence
- Relates to CASA B1-11f, covering Aeroplane Systems, including Instruments and Avionics
Knowledge Levels for Category A, B1, B2, and C Aircraft Maintenance Licences
- Knowledge levels are indicated by numbers (1, 2, or 3) against each applicable subject for categories A, B1, and B2
- Category C applicants must meet either the category B1 or category B2 basic knowledge levels
Level 1 Knowledge
- Familiarity with basic elements of the subject
- Ability to give a simple description of the subject using common words and examples
- Ability to use typical terms
Level 2 Knowledge
- General knowledge of theoretical and practical aspects of the subject
- Ability to apply knowledge
- Objectives:
- Understand theoretical fundamentals of the subject
- Give a general description of the subject using typical examples
- Use mathematical formulae in conjunction with physical laws
- Read and understand sketches, drawings, and schematics
- Apply knowledge in a practical manner using detailed procedures
Level 3 Knowledge
- Detailed knowledge of theoretical and practical aspects of the subject
- Capacity to combine and apply separate elements of knowledge in a logical and comprehensive manner
- Objectives:
- Know the theory of the subject and interrelationships with other subjects
- Give a detailed description of the subject using theoretical fundamentals and specific examples
- Understand and use mathematical formulae related to the subject
- Read, understand, and prepare sketches, simple drawings, and schematics
- Apply knowledge in a practical manner using manufacturer's instructions
- Interpret results from various sources and measurements, and apply corrective action where appropriate### Instrument Systems Pitot Static
- Pitot static systems measure air pressure to provide altitude, airspeed, and vertical speed data to pilots.
The Atmosphere and Atmospheric Standards
- The atmosphere is a layer of gases surrounding the Earth.
- Atmospheric pressure decreases with altitude.
- The atmosphere is divided into regions: troposphere, stratosphere, mesosphere, thermosphere, and exosphere.
- The standard atmosphere is a model used to standardize pressure, temperature, and density.
Pressure Sensing Devices
- Aneroid capsules and bellows are used to measure pressure changes.
- Bellows are flexible tubes that expand or contract with pressure changes.
- Temperature compensation is necessary to ensure accurate pressure readings.
- Bimetallic strips and temperature compensating U-shaped brackets are used for temperature compensation.
Pitot Static Systems
- Pitot probes measure impact pressure.
- Static ports measure static pressure.
- The difference between impact and static pressures gives airspeed.
- Pitot static systems are used in aircraft to provide altitude and airspeed data.
Altimeters
- Altimeters measure aircraft altitude.
- Non-sensitive altimeters measure altitude directly from static pressure.
- Sensitive altimeters measure altitude using a pressure-sensitive diaphragm.
- Barometric adjustment knobs are used to adjust for changes in atmospheric pressure.
Airspeed Indicator
- Airspeed indicators measure airspeed using pitot static pressure.
- Airspeed indicators have a pitot pressure inlet and a static pressure port.
- Maximum allowable airspeed indicators have a red line to indicate maximum safe speed.
Effects of System Blockages
- Static line blockage causes incorrect altitude readings.
- Pitot line blockage causes incorrect airspeed readings.
- System leaks can cause incorrect readings and instrument failure.
Pitot Static System Precautions
- Pitot probes must be kept clean and free of debris.
- Static ports must be kept clean and free of debris.
- System leaks must be checked regularly.
- Drain holes and water traps are used to prevent water from entering the system.### The Atmosphere and Atmospheric Standards
- Air is a mixture of gases in the following proportions:
- Nitrogen (78.08% by volume)
- Oxygen (20.95% by volume)
- Argon (0.93% by volume)
- Carbon dioxide (0.03% by volume)
- Other gases (0.01% by volume)
- The atmosphere consists of a layer of air many kilometers thick, with a weight that causes air pressure of about 14.7 psi at the earth's surface.
- Atmospheric pressure progressively reduces with height (altitude) above the earth.
Regions of the Atmosphere
- The atmosphere is classified into four regions based on the variation of temperature with altitude:
- Troposphere
- Stratosphere
- Mesosphere
- Thermosphere
- Aircraft fly only in the troposphere and the lowest part of the stratosphere.
Troposphere
- The troposphere is the lowest layer of the atmosphere, extending from sea level to the tropopause.
- All of the world's weather is contained in the troposphere.
- The temperature in the troposphere decreases rapidly with altitude, clouds form, and there may be much turbulence.
The Standard Atmosphere
- The standard atmosphere is a set of standard conditions with which observed readings can be compared.
- The standard atmosphere is also known as the International Standard Atmosphere (ISA) or ICAO Standard Atmosphere.
Pressure Sensing Devices
- Aneroid capsules:
- Measure very small changes in pressure with reference to a vacuum.
- Maximum operating range is 0 psia or a vacuum up to about 17 psia.
- Used to measure absolute pressure.
- Bellows:
- Operate similar to an aneroid capsule, but are generally not evacuated and are made of more rugged material.
- Used to measure high, low, or differential pressure.
Pitot Static Systems
- The pitot static system is a system of ports and tubing on the aircraft that supplies pitot and static pressure for the instruments.
- The pitot tube measures the ram pressure of the airstream.
- Static ports measure static pressure and are not affected by the speed of the aircraft.
Altimeters
- An altimeter measures the prevailing atmospheric pressure, which surrounds the aircraft, and displays this pressure in units of feet above sea level.
- Elements of an altimeter:
- Aneroid capsules or bellows
- Linkages and gears
- Instrument pointer
- Temperature compensation mechanisms
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Description
This quiz covers the aeroplane systems, including instruments and avionics, as part of the CASA Category B1 Licence. It's a comprehensive assessment of turbine aeroplane aerodynamics, structures, and systems.
