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 ?
Regulation > weather
Torque measurement is based on ?
For an engine vibration indicator vibration monitoring system ?
Given p = power t = torque n = rpmthe correct relationship P=tn, p=t/n, p=tn², p=t/n² 
A unit commonly used to calculate fuel flow consumption Kg/h, h/kg, kg/m3, lb/m3. 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, a force on a volume, a volume on a force, a volume per unit area. 
Which of following components converts heat into a mechanical movement A bi metallic strip, a thermo couple, a resistance, a spring. 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 Measurement of Air Data Parameters 41 Answer 8
A torque may be expressed in The following units are used torque newton meters inch or foot pounds Question Measurement of Air Data Parameters 41 Answer 9
The different types of tachometers are 1 electrical2 mechanical3 electronicthe combination that regroups all of correct statements , 2, 3,, 2,, 3, 2, 3. 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 Measurement of Air Data Parameters 41 Answer 10
By integrating a flow with respect to time we obtain A volume or a mass, a pressure, diameter of line, cross section of line. 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 Measurement of Air Data Parameters 41 Answer 11
On a multi engine aircraft a synchroscope provides Qualitative indication of difference in speed between engines, quantitative indication (in rpm) of difference in speed between engines, qualitative indication of difference in vibration between engines, quantitative indication (in hz) of difference in speed between engines. Cqb15, august 2012. synchroscope example of display beechcraft baron 58 cockpit. Question Measurement of Air Data Parameters 41 Answer 12
The operating principle of an oil torque meter 1 axial movement generated helically cut gears2 axial force proportional to torque Correct, 2 correct, incorrect, 2 incorrect, correct, 2 incorrect, incorrect, 2 correct. Revised ecqb03 july 2016 Question Measurement of Air Data Parameters 41 Answer 13
On an twin engined aeroplane synchroscope uses following principle It measures frequency difference between two engines driven alternators, a piezoelectric sensor measures vibrations on each engine, it mathematically subtracts rpm of both engines, it mathematically subtracts vibrations of both engines. 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 Measurement of Air Data Parameters 41 Answer 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, as power increased, torque shaft expands (the torque shaft connected to engine only), axial movement generated when cylindricaly cut gears are used to transfer power from one shaft to another, as power increased, torque shaft twists (the torque shaft connected to both engine the propeller's reduction gear box). Question Measurement of Air Data Parameters 41 Answer 15
On an electronic display unit source of vibrations sensed an engine vibration monitoring system Can be displayed (nor n2), can be displayed only n , can be displayed only n2, can not be displayed. Question Measurement of Air Data Parameters 41 Answer 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 Question Measurement of Air Data Parameters 41 Answer 17
On a n1 indicator maximum n1 admissible May be greater than%,%, always lower than%, can not be reached. Question Measurement of Air Data Parameters 41 Answer 18
Concerning thrust measurement n1 defined as Low pressure shaft speed, high pressure shaft speed, egt, epr. Question Measurement of Air Data Parameters 41 Answer 19
Engine speed most commonly displayed as a Percentage of a maximum engine speed, percentage of a minimum engine speed, a pressure ratio, fan rotation speed. Question Measurement of Air Data Parameters 41 Answer 20
A fuel flow meter located In high pressure fuel line to burners, at outlet of high pressure fuel pump, between booster pump the engine, in return line to tanks. Question Measurement of Air Data Parameters 41 Answer 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 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 Measurement of Air Data Parameters 41 Answer 22
Total fuel consumption obtained Integrating fuel flow with respect to time, subtracting initial fuel quantity from remaining fuel, integrating fuel flow with respect to distance, subtracting remaining fuel from initial fuel quantity. Question Measurement of Air Data Parameters 41 Answer 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, incorrect, 2 incorrect, incorrect, 2 correct, correct, 2 incorrect. Question Measurement of Air Data Parameters 41 Answer 24
Which of these statements about fuel mass unit correct T = 22 lb, t = 2lb, t = 45lb, t = 45 lb 1 kg = 2.2 pounds (lbs). Question Measurement of Air Data Parameters 41 Answer 25
Given q = charge coulombs u = potential difference between plates volt the capacitance c farads defined as C = q / u, c = u / q, c = q x u, c = u² / q 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 Measurement of Air Data Parameters 41 Answer 26
The value shown the indicator of a vibration monitoring system 4 this A level of vibration without any unit, 4 %, 4 hz, 4 % or 4 hz depending on aircraft. 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 Measurement of Air Data Parameters 41 Answer 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 Question Measurement of Air Data Parameters 41 Answer 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, a piezoelectric sensor measuring vibrations on each engine, a computer that mathematically subtracts rpm of both engines, a computer that mathematically subtracts vibrations of both engines. 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 Measurement of Air Data Parameters 41 Answer 29
Vibration indicated in cockpit as A direct reading, a frequency, proportional to speed of motor, inversely proportional to speed of motor. 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 Measurement of Air Data Parameters 41 Answer 30
Given p = powert = torqueomega = angular velocitythe correct relationship P = t x omega, t = p x omega, p = t² x omega, t = p / omega Question Measurement of Air Data Parameters 41 Answer 31
The magnitude of a torque defined as Force times its lever arm, force times its moment, force times its area, force per unit of volume. Question Measurement of Air Data Parameters 41 Answer 32
The operating principle of an electronic torque meter As power increased, torque shaft twists, as power decreased, torque shaft twists, as power increases, torque shaft lengthens, as power increases, torsion shaft shrinks. Question Measurement of Air Data Parameters 41 Answer 33
If outside temperature at 35 000 feet 40°c local speed of sound 595 kt, 247 kt, 3 7 kt, 686 kt. 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 Measurement of Air Data Parameters 41 Answer 34
The error in altimeter readings caused the variation of static pressure near source known as Position error, barometric error, instrument error, hysteresis effect. 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 Measurement of Air Data Parameters 41 Answer 35
If static source of an altimeter becomes blocked during a descent instrument will Continue to display reading at which blockage occurred, gradually indicate zero, under read, indicate a height equivalent to setting on millibar subscale Question Measurement of Air Data Parameters 41 Answer 36
If static source to an altimeter becomes blocked during a climb instrument will Continue to indicate reading at which blockage occurred, over read, under read an amount equivalent to reading at time that instrument became blocked, gradually return to zero. Question Measurement of Air Data Parameters 41 Answer 37
If static source to an airspeed indicator asi becomes blocked during a descent instrument will Over read, read zero, continue to indicate speed applicable to that at time of blockage, under read. 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 Measurement of Air Data Parameters 41 Answer 38
A leak in pitot total pressure line of a non pressurized aircraft to an airspeed indicator would cause it to Under read, over read, over read in a climb under read in a descent, under read in a climb over read in a descent. 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 Measurement of Air Data Parameters 41 Answer 39
Machmeter readings are subject to Position pressure error, density error, temperature error, setting 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 Measurement of Air Data Parameters 41 Answer 40
Vno the maximum speed Not to be exceeded except in still air with caution, which must never be exceeded, at which flight controls can be fully deflected, with flaps extended in landing position.
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