In a vibration monitoring system a filter 1 Erases any output which is normal to the engine2 Allows through to the amplifier any frequency that is ?
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Torque measurement is based on ?
For an engine vibration indicator vibration monitoring system ?
Given p = power t = torque n = rpmthe correct relationship No specific unit displayed. Feedback cqb15 may 2012 no specific unit displayed a vibration monitoring system. 
A unit commonly used to calculate fuel flow consumption No specific unit displayed. The following units are used fuel flow when measured mass per hour kilogrammes/hour pounds/hour the following units used fuel flow when measured volume per hour liters/hour us gallons/hour. 
The pressure measured A force per unit area. The following units are used fuel flow when measured mass per hour kilogrammes/hour pounds/hour the following units used fuel flow when measured volume per hour liters/hour us gallons/hour. 
Which of following components converts heat into a mechanical movement A force per unit area. a bimetallic strip used to convert a temperature change into mechanical displacement the strip consists of two strips of different metals which expand at different rates as they are heated usually steel copper or in some cases steel brass the strips are joined together throughout their length riveting brazing or welding the different expansions force flat strip to bend one way if heated in opposite direction if cooled below its initial temperature the metal with higher coefficient of thermal expansion on outer side of curve when strip heated on inner side when cooled. Question 41-8
A torque may be expressed in A force per unit area. The following units are used torque newton meters inch or foot pounds. Question 41-9
The different types of tachometers are 1 electrical2 mechanical3 electronicthe combination that regroups all of correct statements A force per unit area. the following types of tachometers are used in aviation mechanical (rotating magnet) electrical (three phase tacho generator) electronic (impulse measurement with speed probe phonic wheel). Question 41-10
By integrating a flow with respect to time we obtain A force per unit area. Cqb15 august 2012 the following units are used fuel flow when measured mass per hour kilogrammes/hour pounds/hour the following units used fuel flow when measured volume per hour liters/hour us gallons/hour. Question 41-11
On a multi engine aircraft a synchroscope provides Qualitative indication of difference in speed between engines. Cqb15 august 2012 synchroscope example of display beechcraft baron 58 cockpit. Question 41-12
The operating principle of an oil torque meter 1 axial movement generated helically cut gears2 axial force proportional to torque correct 2 correct. Revised ecqb03 july 2016. Question 41-13
On an twin engined aeroplane synchroscope uses following principle It measures frequency difference between two engines driven alternators. Revised ecqb03 july 2016 the purpose of a synchroscope to reduce structural vibration noise the synchronizing system ensures that propeller speeds are all same this achieved an electrical system that compares speed signals from engine mounted generators (engines driven alternators) out of balance signals using one engine as a master signal are automatically corrected electrically trimming engine speeds until all signals are equal. Question 41-14
An oil torque meter makes use of followings phenomenon Axial movement generated when hellicaly cut gears are used to transfer power from one shaft to another. Revised ecqb03 july 2016 the purpose of a synchroscope to reduce structural vibration noise the synchronizing system ensures that propeller speeds are all same this achieved an electrical system that compares speed signals from engine mounted generators (engines driven alternators) out of balance signals using one engine as a master signal are automatically corrected electrically trimming engine speeds until all signals are equal. Question 41-15
On an electronic display unit source of vibrations sensed an engine vibration monitoring system Can be displayed (n or n2). Revised ecqb03 july 2016 the purpose of a synchroscope to reduce structural vibration noise the synchronizing system ensures that propeller speeds are all same this achieved an electrical system that compares speed signals from engine mounted generators (engines driven alternators) out of balance signals using one engine as a master signal are automatically corrected electrically trimming engine speeds until all signals are equal. Question 41-16
On an electronic display unit following n1 parameters can be displayed 1 present n12 commanded n13 maximum n1 operating limitthe combination that regroups all of correct statements Can be displayed (n or n2). Revised ecqb03 july 2016 the purpose of a synchroscope to reduce structural vibration noise the synchronizing system ensures that propeller speeds are all same this achieved an electrical system that compares speed signals from engine mounted generators (engines driven alternators) out of balance signals using one engine as a master signal are automatically corrected electrically trimming engine speeds until all signals are equal. Question 41-17
On a n1 indicator maximum n1 admissible May be greater than %. Revised ecqb03 july 2016 the purpose of a synchroscope to reduce structural vibration noise the synchronizing system ensures that propeller speeds are all same this achieved an electrical system that compares speed signals from engine mounted generators (engines driven alternators) out of balance signals using one engine as a master signal are automatically corrected electrically trimming engine speeds until all signals are equal. Question 41-18
Concerning thrust measurement n1 defined as Low pressure shaft speed. Revised ecqb03 july 2016 the purpose of a synchroscope to reduce structural vibration noise the synchronizing system ensures that propeller speeds are all same this achieved an electrical system that compares speed signals from engine mounted generators (engines driven alternators) out of balance signals using one engine as a master signal are automatically corrected electrically trimming engine speeds until all signals are equal. Question 41-19
Engine speed most commonly displayed as a Percentage of a maximum engine speed. Revised ecqb03 july 2016 the purpose of a synchroscope to reduce structural vibration noise the synchronizing system ensures that propeller speeds are all same this achieved an electrical system that compares speed signals from engine mounted generators (engines driven alternators) out of balance signals using one engine as a master signal are automatically corrected electrically trimming engine speeds until all signals are equal. Question 41-20
A fuel flow meter located In high pressure fuel line to burners. Revised ecqb03 july 2016 the purpose of a synchroscope to reduce structural vibration noise the synchronizing system ensures that propeller speeds are all same this achieved an electrical system that compares speed signals from engine mounted generators (engines driven alternators) out of balance signals using one engine as a master signal are automatically corrected electrically trimming engine speeds until all signals are equal. Question 41-21
Fuel flow can be expressed in 1 kg per m32 lb per m33 lb per hour4 kg per hourthe combination that regroups all of correct statements In high pressure fuel line to burners. Ecqb03 july 2016 the following units are used fuel flow when measured mass per hour kilogrammes/hour pounds(lb)/hour the following units used fuel flow when measured volume per hour liters/hour us gallons/hour. Question 41-22
Total fuel consumption obtained Integrating fuel flow with respect to time. Ecqb03 july 2016 the following units are used fuel flow when measured mass per hour kilogrammes/hour pounds(lb)/hour the following units used fuel flow when measured volume per hour liters/hour us gallons/hour. Question 41-23
Which of these statements about fuel quantity measurement are correct or incorrect 1 the quantity of fuel can be measured volume2 the quantity of fuel can be measured mass correct 2 correct. Ecqb03 july 2016 the following units are used fuel flow when measured mass per hour kilogrammes/hour pounds(lb)/hour the following units used fuel flow when measured volume per hour liters/hour us gallons/hour. Question 41-24
Which of these statements about fuel mass unit correct correct 2 correct. 1 kg = 2 2 pounds (lbs). Question 41-25
Given q = charge coulombs u = potential difference between plates volt the capacitance c farads defined as correct 2 correct. Ecqb03 july 2016 c the capacitance coulomb the quantity of electricity transported in 1 second a current of 1 ampere u the stored energy. Question 41-26
The value shown the indicator of a vibration monitoring system 4 this A level of vibration without any unit. the gas turbine aircraft engine vibration indicating system features include engine curls rotation frequency measurement with two independent measuring channels vibration level measurement with multiple engine mounted piezoelectric sensors using digital broadband filters on each vibration sensor or digital monitoring narrow band filters on curls main harmonics frequencies as well as a comparison of measured extreme limits of vibration 'excessive vibration' 'vibration limit' signals formed when limits are exceeded no specific unit displayed a vibration monitoring system. Question 41-27
The types of sensors used in an engine vibration monitoring system may be 1 magnetic2 tachometer3 piezo electric crystalthe combination that regroups all of correct statements A level of vibration without any unit. the gas turbine aircraft engine vibration indicating system features include engine curls rotation frequency measurement with two independent measuring channels vibration level measurement with multiple engine mounted piezoelectric sensors using digital broadband filters on each vibration sensor or digital monitoring narrow band filters on curls main harmonics frequencies as well as a comparison of measured extreme limits of vibration 'excessive vibration' 'vibration limit' signals formed when limits are exceeded no specific unit displayed a vibration monitoring system. Question 41-28
On a twin engined aeroplane synchroscope can consist of A rotor fed the alternator driven the master engine a stator fed the alternator driven the engine to synchronised. Ecqb03 july 2016 the purpose of a synchroscope to reduce structural vibration noise the synchronizing system ensures that propeller speeds are all same this achieved an electrical system that compares speed signals from engine mounted generators (engines driven alternators) out of balance signals using one engine as a master signal are automatically corrected electrically trimming engine speeds until all signals are equal synchroscope example of display beechcraft baron 58 cockpit. Question 41-29
Vibration indicated in cockpit as A rotor fed the alternator driven the master engine a stator fed the alternator driven the engine to synchronised. Revised ecqb03 july 2016 the engine vibration monitoring on a turbojet engine indicates any vibration resulting from an imbalance on rotation parts of engine the gas turbine aircraft engine vibration indicating system features include engine curls rotation frequency measurement with two independent measuring channels vibration level measurement with multiple engine mounted piezoelectric sensors using digital broadband filters on each vibration sensor or digital monitoring narrow band filters on curls main harmonics frequencies as well as a comparison of measured extreme limits of vibration 'excessive vibration' 'vibration limit' signals formed when limits are exceeded no specific unit displayed a vibration monitoring system. Question 41-30
Given p = powert = torqueomega = angular velocitythe correct relationship A rotor fed the alternator driven the master engine a stator fed the alternator driven the engine to synchronised. Revised ecqb03 july 2016 the engine vibration monitoring on a turbojet engine indicates any vibration resulting from an imbalance on rotation parts of engine the gas turbine aircraft engine vibration indicating system features include engine curls rotation frequency measurement with two independent measuring channels vibration level measurement with multiple engine mounted piezoelectric sensors using digital broadband filters on each vibration sensor or digital monitoring narrow band filters on curls main harmonics frequencies as well as a comparison of measured extreme limits of vibration 'excessive vibration' 'vibration limit' signals formed when limits are exceeded no specific unit displayed a vibration monitoring system. Question 41-31
The magnitude of a torque defined as Force times its lever arm. Revised ecqb03 july 2016 the engine vibration monitoring on a turbojet engine indicates any vibration resulting from an imbalance on rotation parts of engine the gas turbine aircraft engine vibration indicating system features include engine curls rotation frequency measurement with two independent measuring channels vibration level measurement with multiple engine mounted piezoelectric sensors using digital broadband filters on each vibration sensor or digital monitoring narrow band filters on curls main harmonics frequencies as well as a comparison of measured extreme limits of vibration 'excessive vibration' 'vibration limit' signals formed when limits are exceeded no specific unit displayed a vibration monitoring system. Question 41-32
The operating principle of an electronic torque meter As power increased torque shaft twists. Revised ecqb03 july 2016 the engine vibration monitoring on a turbojet engine indicates any vibration resulting from an imbalance on rotation parts of engine the gas turbine aircraft engine vibration indicating system features include engine curls rotation frequency measurement with two independent measuring channels vibration level measurement with multiple engine mounted piezoelectric sensors using digital broadband filters on each vibration sensor or digital monitoring narrow band filters on curls main harmonics frequencies as well as a comparison of measured extreme limits of vibration 'excessive vibration' 'vibration limit' signals formed when limits are exceeded no specific unit displayed a vibration monitoring system. Question 41-33
If outside temperature at 35 000 feet 40°c local speed of sound As power increased torque shaft twists. lss varies with square root of absolute temperature formula lss = 39 x square root of (oat+273) lss = 39 x square root of 233 lss = 595 kt. Question 41-34
The error in altimeter readings caused the variation of static pressure near source known as As power increased torque shaft twists. Variation of static pressure near source known as position error barometric error caused setting wrong number in altimeter window instrument error caused the imperfections of manufacture hysteresis errors are caused the irregular elasticity of capsule. Question 41-35
If static source of an altimeter becomes blocked during a descent instrument will Continue to display reading at which blockage occurred. Variation of static pressure near source known as position error barometric error caused setting wrong number in altimeter window instrument error caused the imperfections of manufacture hysteresis errors are caused the irregular elasticity of capsule. Question 41-36
If static source to an altimeter becomes blocked during a climb instrument will Continue to indicate reading at which blockage occurred. Variation of static pressure near source known as position error barometric error caused setting wrong number in altimeter window instrument error caused the imperfections of manufacture hysteresis errors are caused the irregular elasticity of capsule. Question 41-37
If static source to an airspeed indicator asi becomes blocked during a descent instrument will Continue to indicate reading at which blockage occurred. the asi a sensitive differential pressure gauge which measures promptly indicates difference between pitot (total pressure) static pressure (total pressure static pressure = dynamic pressure) these two pressures are equal when aircraft parked on ground in calm air when aircraft moves through air pressure on pitot line becomes greater than pressure in static lines this difference in pressure registered the airspeed pointer on face of instrument thus while descending total pressure increases* the static pressure (from static source) does not your airspeed indicator will over read *while descending density increases so total pressure increases. Question 41-38
A leak in pitot total pressure line of a non pressurized aircraft to an airspeed indicator would cause it to Continue to indicate reading at which blockage occurred. airspeed indicator (asi) the asi a sensitive differential pressure gauge which measures promptly indicates difference between pitot (impact/dynamic pressure) static pressure these two pressures are equal when aircraft parked on ground in calm air when aircraft moves through air pressure on pitot line becomes greater than pressure in static lines this difference in pressure registered the airspeed pointer on face of instrument which calibrated in miles per hour knots (nautical miles per hour) or both airspeed indication on airspeed indicator is total pressure static pressure = dynamic pressure therefore with a leak in pitot total pressure line it similar to a reduction of speed (a reduction of relative flow entering in pitot tube) the airspeed indicator will under read. Question 41-39
Machmeter readings are subject to Position pressure error. machmeter errors mach number proportional to ratio of pitot pressure to static pressure ie to (pt ps)/ps this exaclty what machmeter measures thus any non standard temperature or density do not affect accuracy of machmeter the only error worth considering the pressure (position error) in addition to usually small instrument error a mach meter can be considered accurate to within +/ 0 01 mach in normal operating range or to within +/ 0 02 at limits of that range. Question 41-40
Vno the maximum speed Not to be exceeded except in still air with caution. machmeter errors mach number proportional to ratio of pitot pressure to static pressure ie to (pt ps)/ps this exaclty what machmeter measures thus any non standard temperature or density do not affect accuracy of machmeter the only error worth considering the pressure (position error) in addition to usually small instrument error a mach meter can be considered accurate to within +/ 0 01 mach in normal operating range or to within +/ 0 02 at limits of that range.
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