Question 55-1 : Given q = charge coulombs u = potential difference between the plates volt c= capacitance farads the correct relationship between these parameters is ? [ Objective Licence ]

Question 55-2 : 20 bar is approximately equal to ?

300 psi.

1 psi pound per square inch = 007 bar1 bar = 15 psi

Question 55-3 : The relation between c and k is c celsius° k kelvin ?

K = c + 27315.

Fahrenheit = 18 x c + 32kelvin = c + 27315

Question 55-4 : A pressure of 200 bar is equivalent to approximately ?

3000 psi.

1 psi pound per square inch = 007 bar1 bar = 15 psi

Question 55-5 : Changes in temperature of the fuel affect its density volume and dielectric value era decrease in temperature causes ?

A decreases in volume increases in density and increases in er.

Warning this question also exists at the exam with the end statement an increase in temperature causes in this case answer is an increase in volume decrease in density and decrease in er mnemonic decrease in temperature = d i iincrease in temperature = i d d

Question 55-6 : On a multi engine aircraft a synchroscope provides ?

An automatic andor a visual system to synchronize the propellers rotation speeds.

Cqb15 may 2012on a multi engined aircraft a synchronizing system ensures the propeller speeds are all the same this is achieved by an electrical system that compares speed signals from engine mounted generators out of balance signals using one engine as a master signal are automatically corrected by electrically trimming the engine speeds until all signals are equal

Question 55-7 : The parameters used to represent thrust are 1 n1 low pressure shaft speed 2 n2 high pressure shaft speed 3 egt4 eprthe combination that regroups all of the correct statements is ?

1 4.

Ecqb03 july 2016

Question 55-8 : Which statement about fuel flow are correct or incorrect i fuel flow may be measured by volume per unit of timeii fuel flow may be measured by mass per unit of time ?

I is correct ii is correct.

Cqb15 may 2012units used for fuel flow when measured by volume per hour are litershour us gallonshourunits used for fuel flow when measured by mass per hour kilogrammeshour poundshour

Question 55-9 : 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 considered to be harmful to the engine ?

1 is correct 2 is correct.

Revised ecqb03 july 2016the gas turbine aircraft engine vibration indicating system features include engine c s 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 c s main harmonics frequencies as well as a comparison of measured and extreme limits of vibration 'excessive vibration' and 'vibration limit' signals formed when limits are exceeded no specific unit is displayed for a vibration monitoring system

Question 55-10 : Torque measurement is based on ?

Twist of the torque shaft of a known length.

Torque can also be determined by measuring the change in phase between the torque shaft and the reference shaft

Question 55-11 : For an engine vibration indicator vibration monitoring system ?

No specific unit is displayed.

Feedback cqb15 may 2012 no specific unit is displayed for a vibration monitoring system

Question 55-12 : Given p = power t = torque n = rpmthe correct relationship is ?

P=tn.

Question 55-13 : A unit commonly used to calculate fuel flow consumption is ?

Kgh.

The following units are used for fuel flow when measured by mass per hour kilogrammeshour poundshourthe following units used for fuel flow when measured by volume per hour litershour us gallonshour

Question 55-14 : The pressure is measured by ?

A force per unit area.

Question 55-15 : Which of the following components converts heat into a mechanical movement ?

A bi metallic strip.

1031a bimetallic strip is 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 and copper or in some cases steel and brass the strips are joined together throughout their length by riveting brazing or welding the different expansions force the flat strip to bend one way if heated and in the opposite direction if cooled below its initial temperaturethe metal with the higher coefficient of thermal expansion is on the outer side of the curve when the strip is heated and on the inner side when cooled

Question 55-16 : A torque may be expressed in ?

Nm.

The following units are used for torque newton meters inch or foot pounds

Question 55-17 : The different types of tachometers are 1 electrical2 mechanical3 electronicthe combination that regroups all of the correct statements is ?

1 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 and phonic wheel

Question 55-18 : By integrating a flow with respect to time we obtain ?

A volume or a mass.

Cqb15 august 2012the following units are used for fuel flow when measured by mass per hour kilogrammeshour poundshourthe following units used for fuel flow when measured by volume per hour litershour us gallonshour

Question 55-19 : On a multi engine aircraft a synchroscope provides ?

Qualitative indication of the difference in speed between the engines.

Cqb15 august 2012synchroscope example of display beechcraft baron 58 cockpit

Question 55-20 : The operating principle of an oil torque meter is 1 axial movement is generated by helically cut gears2 axial force is proportional to the torque ?

1 is correct 2 is correct.

Revised ecqb03 july 2016

Question 55-21 : On an twin engined aeroplane the synchroscope uses the following principle ?

It measures the frequency difference between the two engines driven alternators.

Revised ecqb03 july 2016the purpose of a synchroscope is to reduce structural vibration and noise the synchronizing system ensures that the propeller speeds are all the same this is achieved by 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 by electrically trimming the engine speeds until all signals are equal

Question 55-22 : An oil torque meter makes use of the followings phenomenon ?

Axial movement is generated when hellicaly cut gears are used to transfer power from one shaft to another.

Cqb15 august 2012

Question 55-23 : On an electronic display unit the source of the vibrations sensed by an engine vibration monitoring system ?

Question 55-24 : On an electronic display unit the following n1 parameters can be displayed 1 present n12 commanded n13 maximum n1 operating limitthe combination that regroups all of the correct statements is ?

1 2 3.

Ecqb03 july 2016

Question 55-25 : On a n1 indicator the maximum n1 admissible ?

May be greater than 100%.

Question 55-26 : Concerning thrust measurement the n1 is defined as the ?

Low pressure shaft speed.

Question 55-27 : Engine speed is most commonly displayed as a ?

Percentage of a maximum engine speed.

Question 55-28 : A fuel flow meter is located ?

In the high pressure fuel line to the burners.

Ecqb03 july 2016

Question 55-29 : Fuel flow can be expressed in 1 kg per m32 lb per m33 lb per hour4 kg per hourthe combination that regroups all of the correct statements is ?

3 4.

Ecqb03 july 2016the following units are used for fuel flow when measured by mass per hour kilogrammeshour pounds lb hourthe following units used for fuel flow when measured by volume per hour litershour us gallonshour

Question 55-30 : Total fuel consumption is obtained by ?

Integrating the fuel flow with respect to time.

Ecqb03 july 2016

Question 55-31 : Which of these statements about fuel quantity measurement are correct or incorrect 1 the quantity of fuel can be measured by volume2 the quantity of fuel can be measured by mass ?

1 is correct 2 is correct.

Ecqb03 july 2016

Question 55-32 : Which of these statements about the fuel mass unit is correct ?

1 t = 2200 lb.

1 kg = 22 pounds lbs

Question 55-33 : Given q = charge coulombs u = potential difference between the plates volt the capacitance c farads is defined as ?

C = q u.

Ecqb03 july 2016c is the capacitance coulomb is the quantity of electricity transported in 1 second by a current of 1 ampere and u is the stored energy

Question 55-34 : The value shown by the indicator of a vibration monitoring system is 4 this is ?

A level of vibration without any unit.

1029the gas turbine aircraft engine vibration indicating system features include engine c s 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 c s main harmonics frequencies as well as a comparison of measured and extreme limits of vibration excessive vibration and vibration limit signals formed when limits are exceeded no specific unit is displayed for a vibration monitoring system

Question 55-35 : The types of sensors used in an engine vibration monitoring system may be 1 magnetic2 tachometer3 piezo electric crystalthe combination that regroups all of the correct statements is ?

1 3.

Ecqb03 july 2016

Question 55-36 : On a twin engined aeroplane the synchroscope can consist of ?

A rotor fed by the alternator driven by the master engine and a stator fed by the alternator driven by the engine to by synchronised.

Ecqb03 july 2016the purpose of a synchroscope is to reduce structural vibration and noise the synchronizing system ensures that the propeller speeds are all the same this is achieved by 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 by electrically trimming the engine speeds until all signals are equalsynchroscope example of display beechcraft baron 58 cockpit

Question 55-37 : Vibration is indicated in the cockpit as ?

A direct reading.

Revised ecqb03 july 2016the engine vibration monitoring on a turbojet engine indicates any vibration resulting from an imbalance on the rotation parts of the enginethe gas turbine aircraft engine vibration indicating system features include engine c s 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 c s main harmonics frequencies as well as a comparison of measured and extreme limits of vibration 'excessive vibration' and 'vibration limit' signals formed when limits are exceeded 1029 no specific unit is displayed for a vibration monitoring system

Question 55-38 : Given p = powert = torqueomega = angular velocitythe correct relationship is ?

P = t x omega.

Question 55-39 : The magnitude of a torque is defined as ?

Force times its lever arm.

Question 55-40 : The operating principle of an electronic torque meter is ?

As power is increased the torque shaft twists.