022 01 00 00 SENSORS AND INSTRUMENTS

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022 01 01 00 Pressure gauge
022 01 01 01 Units for pressure, sensor types, measurements
(01) X Define ‘pressure’, ‘absolute pressure’ and ‘differential pressure’.
(02) X “List the following units used for pressure measurement:
— Pascal;
— bar;
— inches of mercury (in Hg);
— pounds per square inch (psi).”
(03) X State the relationship between the different units.
(04) “List and describe the following different types of sensors used according to the pressure to be measured:
— aneroid capsules;
— bellows;
— diaphragms;
— bourdon tube.”
(05) Identify pressure measurements that are applicable to an aircraft:
Syllabus reference BK Syllabus details and associated Learning Objectives

“— liquid-pressure measurement (fuel, oil, hydraulic);
— air-pressure measurement (bleed-air systems, air- conditioning systems);
— engine-pressure measurement manifold pressure (MAP), engine pressure ratio (EPR)).”
(06) Identify and read pressure measurement indications both for engine indications and other systems.
(07) “Explain the implications of the following pressure measurement errors both for engine indications and other systems:
— loss of pressure sensing;
— incorrect pressure indications.”
022 01 02 00 Temperature sensing
022 01 02 01 Units for temperature, measurements
(01) X Explain temperature.
(02) X “List the following units that can be used for temperature measurement:
— Kelvin;
— Celsius;
— Fahrenheit.”
(03) X State the relationship between these units and convert between them.
(04) “Identify temperature measurements that are applicable to an aircraft:
— gas temperature measurement (ambient air, bleed-”
Syllabus reference BK Syllabus details and associated Learning Objectives

“air systems, air-conditioning systems, air inlet, exhaust gas, gas turbine outlets);
— liquid-temperature measurement (fuel, oil, hydraulic);
— component-temperature measurement (generator, transformer rectifier unit (TRU), pumps (fuel, hydraulic), power transfer unit (PTU).”
(05) Identify and read temperature measurement indications for both engine indications and other systems.
022 01 03 00 Fuel gauge
022 01 03 01 Units for fuel, measurements, fuel gauges
(01) State that the quantity of fuel can be measured by volume or mass.
(02) “List the following units used for fuel quantity:
— kilogramme;
— pound;
— litres;
— gallons (US and imperial).”
(03) Convert between the various units.
(04) “Explain the parameters that can affect the measurement of the volume or mass of the fuel in a fuel tank:
— temperature;
— aircraft accelerations and attitudes;
— and explain how the fuel-gauge system design compensates for these changes.”
Syllabus reference BK Syllabus details and associated Learning Objectives

(05) “Describe and explain the operating principles of the following types of fuel gauges:
— float system;
— capacitance-type of fuel-gauge system.
— ultrasound-type of fuel-gauge system: to be introduced at a later date.”
(06) “Describe and complete a typical post-refuelling procedure for a pilot:
— recording the volume that was filled;
— converting to the appropriate unit used by the aircraft fuel gauge(s) to compare the actual indicated fuel content to the calculated fuel content;
— assess appropriate action if the numbers does not compare.”
022 01 04 00 Fuel flowmeters
022 01 04 01 Fuel flow, units for fuel flow, total fuel consumption
(01) Define ‘fuel flow’ and where it is measured.
(02) State that fuel flow may be measured by volume or mass per unit of time.
(03) “List the following units used for fuel flow when measured by mass per hour:
— kilogrammes/hour;
— pounds/hour.”
(04) List the following units used for fuel flow when measured by volume per hour:
Syllabus reference BK Syllabus details and associated Learning Objectives

“— litres/hour;
— imperial gallons/hour;
— US gallons/hour.”
(05) Explain how total fuel consumption is obtained.
022 01 05 00 Tachometer
022 01 05 01 Types, operating principles, units for engine speed
(01) X “List the following types of tachometers, describe their basic operating principle and give examples of use:
— mechanical (rotating magnet);
— electrical (three-phase tacho-generator);
— electronic (impulse measurement with speed probe and phonic wheel);
— and describe the operating principle of each type.”
(02) “Explain the typical units for engine speed:
— rpm for piston-engine aircraft;
— percentage for turbine-engine aircraft.”
(03) Explain that some types of rpm indicators require electrical power to provide an indication.
022 01 06 00 Thrust measurement
022 01 06 01 Parameters, operating principle
(01) “List and describe the following two parameters used to represent thrust:
— N1;”
Syllabus reference BK Syllabus details and associated Learning Objectives

— EPR.
(02) Explain the operating principle of using an engine with EPR indication and explain the consequences of incorrect or missing EPR to the operation of the engine, including reverting to N1 mode.
(03) Give examples of display for N1 and EPR.
022 01 07 00 Engine torquemeter
022 01 07 01 Torque, torquemeters
(01) Define ‘torque’.
(02) Explain the relationship between power, torque and rpm.
(03) “List the following units used for torque:
— Newton meters;
— inch or foot pounds.”
(04) State that engine torque can be displayed as a percentage.
(05) X “List and describe the following different types of torquemeters, and explain their operating principles:
— mechanical;
— electronic.”
(06) X Compare the two systems with regard to design and weight.
(07) Give examples of display.
022 01 08 00 Synchroscope
Syllabus reference BK Syllabus details and associated Learning Objectives

022 01 08 01 Purpose, operating principle, display
(01) State the purpose of a synchroscope.
(02) X Explain the operating principle of a synchroscope.
(03) Give examples of display.
022 01 09 00 Engine-vibration monitoring
022 01 09 01 Purpose, operating principle of a vibration-monitoring system, display
(01) State the purpose of a vibration-monitoring system for a jet engine.
(02) X “Describe the operating principle of a vibration-monitoring system using the following two types of sensors:
— piezoelectric crystal;
— magnet.”
(03) Explain that there is no specific unit for vibration monitoring, i.e. it is determined by specified numeric threshold values.
(04) Give examples of display.
022 01 10 00 Time measurement
022 01 10 01 On-board clock
(01) Explain that the on-board aircraft clock provides a time reference for several of the on-board systems including aircraft communications addressing and reporting system (ACARS) and engine and systems maintenance.
Syllabus reference BK Syllabus details and associated Learning Objectives

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