Question 56-1 : If the outside temperature at 35 000 feet is 40°c the local speed of sound is ? [ Procedure VFR ]

Question 1

Question 56-1 : If the outside temperature at 35 000 feet is 40°c the local speed of sound is ? [ Procedure VFR ]

595 kt

Answer

Position error.

Variation of the static pressure near the source is known as position errorbarometric error is caused by setting the wrong number in the altimeter windowinstrument error is caused by the imperfections of manufacturehysteresis errors are caused by the irregular elasticity of the capsule

Answer

Continue to display the reading at which the blockage occurred.

Answer

Continue to indicate the reading at which the blockage occurred.

Answer

Over read.

Img959the asi is a sensitive differential pressure gauge which measures and promptly indicates the difference between pitot total pressure and static pressure total pressure static pressure = dynamic pressure these two pressures are equal when the aircraft is parked on the ground in calm airwhen the aircraft moves through the air the pressure on the pitot line becomes greater than the pressure in the static lines this difference in pressure is registered by the airspeed pointer on the face of the instrumentthus while descending the total pressure increases* and the static pressure from the static source does not your airspeed indicator will over read*while descending density increases so total pressure increases

Answer

Under read.

Airspeed indicator asi the asi is a sensitive differential pressure gauge which measures and promptly indicates the difference between pitot impactdynamic pressure and static pressure these two pressures are equal when the aircraft is parked on the ground in calm air when the aircraft moves through the air the pressure on the pitot line becomes greater than the pressure in the static lines this difference in pressure is registered by the airspeed pointer on the face of the instrument which is calibrated in miles per hour knots nautical miles per hour or both 980 airspeed indication on the airspeed indicator is total pressure static pressure = dynamic pressuretherefore with a leak in the pitot total pressure line it is similar to a reduction of speed a reduction of the relative flow entering in the pitot tube the airspeed indicator will under read

Answer

Position pressure error.

Machmeter errors mach number is proportional to the ratio of pitot pressure to static pressure ie to pt ps ps and this is exaclty what the machmeter measures thus any non standard temperature or density do not affect the accuracy of the machmeter and the only error worth considering is the pressure position error in addition to the usually small instrument errora mach meter can be considered accurate to within + 001 mach in the normal operating range or to within + 002 at the limits of that range

Density error. temperature error. setting error.

Answer

Not to be exceeded except in still air and with caution.

Answer

Which must never be exceeded.

Answer

Speed at which the landing gear can be operated with full safety.

Answer

Mach number of the aircraft.

The pressure errors on a pitotstatic systems vary with aircraft speed but specifically with mach number

Answer

The altitude of the standard atmosphere on which the density is equal to the actual density of the atmosphere.

The density altitude is the altitude in the standard atmosphere at which prevailing density occurs meaning your real altitude from the effects of height temperature and humidity and is used to establish performance as it is a figure that expresses where your machine thinks it is as opposed to where it actually is

Answer

Correction based on an accelerometer sensor.

On a vertical speed indicator the pointer takes a few seconds to steady because of the time taken to build up a steady pressure difference on climb or descent there will also be a time lag on levelling out because of the timeto overcome the problem of lag the instantaneous vertical speed indicator ivsi incorporates an accelerometer sensor which responds quickly to a change of altitudethe figure below shows an ivsi at the beginning of a descent 988the piston in the vertical acceleration pump immediately rises in the cylinder and causes a temporary increase of pressure in the capsule the capsule expands and the pointer will give an instant indication of descentas the initial acceleration is turned into a steady rate of descent the piston will slowly descend to its original position but by this time the correct differential pressure between the capsule and the case will have been set up and the correct rate of descent will continue to be shown

Answer

In standard atmosphere to the pressure ps prevailing at this point.

The altimeter is calibrated to standard atmosphere conditionsit is nothing more than a barometer which measures atmospheric pressure and relates it to the altitude at which that pressure is found in a standard atmosphere in a standard atmosphere the pressure at 5000 feet is 850 hpa so if the static pressure ps is 850 hpa the altimeter tells you that you are 5000 feet and this is your pressure altitude

Answer

78185 hpa.

7000 ft 28 ft par hpa = 250 hpapressure at mean sea level msl in international standard atmosphere is 101325 hpa101325 250 = 76325this answer is close to 78185 hpa lucastefanon fl 70 ==> 770 hpatrue altitude 7x4x10= 280 ft28027=105 hpaas it's warmer then must be added so 770+105= 7805 which i think it's more precise value respect to the answer

Answer

Temperature.

Answer

661 kt.

The velocity of sound varies only with temperature s = 39 x sqrt °kelvinto get kelvin add 273 to the centigrade +15°c + 273 = 288°ks = 39 x sqrt 288°k = 6608 ktsqrt square root

Answer

Vno for the lower limit and vne for the upper limit.

Img1034

Answer

Vs1 for the lower limit and vno for the upper limit.

Img1034

Answer

Vso for the lower limit and vfe for the upper limit.

Img1034white scale vso to vfe fe from flap extended green scale vs without flaps to vnoyellow scale vno to vnered line vne speed of never exceed

Answer

The outside temperature.

The mach number is a function of p s swhere p = total pressure pitot s = static pressureindications on the mach indicator will vary with p s and p s which is the differential pressure measurementtas will vary with temperature but not the mach indicator

Answer

Decreases steadily.

Franck the asi air speed indicator is provided by the pitot and static vent the pitot is blocked so the asi is going to react like an altimeter

Answer

Pt ps ps.

Pt total pressureps static pressuredynamic pressure = pt psmach number is proportional to dynamic pressurestatic pressure

Answer

True airspeed tas divided by the local speed of sound.

Answer

Tt = ts 1+02 m².

This question is a little bit tricky if you add the recovery coefficient to the formula you will have exactly the total temperature without you only have an approximation

Answer

React like an altimeter.

Answer

Ts = tt 1+02 m².

Answer

Optimum climbing speed with one engine inoperative or vy.

Answer

The ratio of the aircraft true airspeed to the sonic velocity at the altitude considered.

Mach number formula m = tasa a= local speed sound

Answer

Measurement of barometric pressure from a static source on the fuselage static pressure .

Answer

Indicated speed and altitude using a speed indicator equipped with an altimeter type aneroid.

The mach meter modifies the output from an airspeed capsule by using an altimeter aneroid capsule

Answer

I vacuum or a very low pressure ii static pressure.

Answer

Overreads the altitude in case of a sideslip to the left and displays the correct information during symmetric flight.

Amassa with a side slip to the left pressure will increase on the left side of the aircraft and decrease on the rightif both static ports are open the pressures are compensated this is why two static ports are used so a lower static pressure will be sensed and the altimeter will overread the aircraft's altitude

Answer

Static pressure.

Answer

Static pressure.

Answer

Higher or equal to static air temperature sat depending on mach number and sat.

Tat = sat 1 + 02 x kr x m² sat the static temperature in kelvin tat the total temperature in kelvin kr the recovery coefficient m the mach numberif mach is 0 sat = tatif sat is 0 tat = satabsolute zero in kelvin is almost impossible to reach but from the formula tat will be 0 if sat is 0

Answer

3 4 5.

The adc air data computer uses as input data static pressure total pressure pitot pressure and tat 1023

exemple 300: 3 4 5 — 1, 2. 2, 5. 2, 3, 4.

Answer

Standard + 10°c.

What is the oat outside air temperature at fl180 in standard atmosphere 15° 2 x 18 ° = 21ºc at fl180calculation 997oat at fl180 is 11°c instead of 21°c the present weather conditions compared with the standard atmosphere are standard + 10°c

Answer

2 3.

Conical slotted probe the angle of attack aoa probe provides aoa or sideslip ss by sensing the direction of local airflow it is mounted on the fuselage with the sensing probe extending through the aircraft fuselage the sensing probe is continually driven to null pressure differential between the upper and lower slots in its forward surface these features sense the direction of air stream flow local aoa or ss the angular position of the sensing probe is converted to an electrical output by an angular sensor 998 999vane detector the angle of attack sensor is of the wind vane type its sensing element is a small wing which is positioned in the direction of airflow the small wing is mechanically linked to a free turn shaft which drives the devices transmitting the local angle of attack signal 1000

Question 2

Question 56-2 : The error in altimeter readings caused by the variation of the static pressure near the source is known as ?

Question 3

Question 56-3 : If the static source of an altimeter becomes blocked during a descent the instrument will ?

Question 4

Question 56-4 : If the static source to an altimeter becomes blocked during a climb the instrument will ?

Question 5

Question 56-5 : If the static source to an airspeed indicator asi becomes blocked during a descent the instrument will ?

Question 6

Question 56-6 : A leak in the pitot total pressure line of a non pressurized aircraft to an airspeed indicator would cause it to ?

Question 7

Question 56-7 : Machmeter readings are subject to ?

Question 8

Question 56-8 : Vno is the maximum speed ?

Question 9

Question 56-9 : Vne is the maximum speed ?

Question 10

Question 56-10 : Vlo is the maximum ?

Question 11

Question 56-11 : The position error of the static vent on which the altimeter is connected varies substantially with the ?

Question 12

Question 56-12 : The density altitude is ?

Question 13

Question 56-13 : The response time of a vertical speed detector may be decreased by adding a ?

Question 14

Question 56-14 : The pressure altitude is the altitude corresponding ?

Question 15

Question 56-15 : The atmospheric pressure at fl 70 in a standard + 10 atmosphere is ?

Question 16

Question 56-16 : Sound propagates through the air at a speed which only depends on ?

Question 17

Question 56-17 : The velocity of sound at the sea level in a standard atmosphere is ?

Question 18

Question 56-18 : The limits of the yellow scale of an airspeed indicator are ?

Question 19

Question 56-19 : The limits of the green scale of an airspeed indicator are ?

Question 20

Question 56-20 : The limits of the white scale of an airspeed indicator are ?

Question 21

Question 56-21 : The reading of a mach indicator is independent of ?

Question 22

Question 56-22 : After an aircraft has passed through a volcanic cloud which has blocked the total pressure probe inlet of the airspeed indicator the pilot begins a stabilized descent and finds that the indicated airspeed ?

Question 23

Question 56-23 : The principle of the mach indicator is based on the computation of the ratio ?

Question 24

Question 56-24 : The mach number is the ?

Question 25

Question 56-25 : Given ts the static temperature sat tt the total temperature tat kr the recovery coefficient m the mach numberthe total temperature can be expressed approximately by the formula ?

Question 26

Question 56-26 : A blocked pitot head with a clear static source causes the airspeed indicator to ?

Question 27

Question 56-27 : Given m is the mach numberts is the static temperaturett is the total temperature ?

Question 28

Question 56-28 : The airspeed indicator of a twin engine aircraft comprises different sectors and colour marks the blue line corresponds to the ?

Question 29

Question 56-29 : The mach number is ?

Question 30

Question 56-30 : In an adc air data computer the altitude is computed from ?

Question 31

Question 56-31 : Indication of mach number is obtained from ?

Question 32

Question 56-32 : The altimeter consists of one or several aneroid capsules located in a sealed casing the pressures in the aneroid capsule i and casing ii are respectively ?

Question 33

Question 56-33 : In case of accidental closing of an aircraft's left static pressure port rain birds the altimeter ?

Question 34

Question 56-34 : The vertical speed indicator vsi is fed by ?

Question 35

Question 56-35 : The altimeter is supplied with ?

Question 36

Question 56-36 : Total air temperature tat is ?

Question 37

Question 56-37 : An air data computer 1 supplies gs and drift angle2 determines tat and true altitude3 receives static pressure and total pressure4 supplies tas to the ins computer5 determines mach number and oatthe combination regrouping all the correct statements is ?

Question 38

Question 56-38 : An aircraft is flying at flight level fl180 and mach number 036 its onboard thermometer reads tat = 5°c considering that the probe recovery coefficient is 084 the present weather conditions compared with the standard atmosphere are ?

Question 39

Question 56-39 : An airspeed indicator displays ?

Ias.

Img1034ias for indicated air speed

Question 40

Question 56-40 : The angle of attack transmitter placed laterally on the forward part of the fuselage supplies an electrical signal which can indicate the angular position of 1 a specific slaved pitot probe2 a vane detector3 a conical slotted probethe combination regrouping all the correct statements is ?