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Avionica UD4
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Questions in this quiz (66)
1Which of the next instruments must be on any aircraft obligatorily :
- Aa) Thermomether
- Bb) Clock
- Cc) Altimeter
- Dd) All of the above
2The organization with legal regulatory authority within the EU is:
- Aa) EASA
- Bb) JAA
- Cc) FAA
- Dd) None of the above
3The time that a plane is allowed to fly with one engine inoperative is called:
- Aa) Single-engine range
- Bb) ICAO
- Cc) ETOPS
- Dd) AAJMG
4Which one is not an air data instrument:
- Aa) Machmeter
- Bb) Vertical speed indicator
- Cc) Altimeter
- Dd) Turn indicator
5The RAM effect:
- Aa) Decreases air temperature
- Bb) Increases air temperature
- Cc) Can increase or decrease air temperature
- Dd) Does not affect air temperature
6Which of the following thermometers is not usually used in aviation:
- Aa) Mercury thermometer
- Bb) Thermistors
- Cc) Thermocouples
- Dd) Optical pyrometer
7Which is the minimum ETOPS to be allowed to cross the Atlantic:
- Aa) 60 minimum ETOPS
- Bb) 120 min ETOPS
- Cc) 180 min ETOPS
- Dd) 370 min ETOPS
8Which is the instrument arrangement used in the C101:
- Aa) 6 grouping
- Bb) T grouping
- Cc) It uses digital displays
- Dd) None of the above
9The most important parameters that a pilot must know during a navigation are:
- Aa) Direction of travel and Speed (Air Data System)
- Bb) Weight and balance of the aircraft
- Cc) Engines limitations
- Dd) Aircraft characteristics
10About General Navigation Instruments:
- Aa) Depend on a GPS
- Bb) Depend on Radio Navigation aids
- Cc) Compass belong to this kind of Instruments
- Dd) All of the above are fake
11A Gyroscope:
- Aa) is a rigid body with one principal moment of inertia much larger than the other
two - Bb) is in high spin around its axis of maximum inertia.
- Cc) is a special kind of compass
- Dd) A and B are both correct
- Aa) is a rigid body with one principal moment of inertia much larger than the other
12The main properties of a gyroscope are:
- Aa) Flexibility and Precession
- Bb) Rigidity and Precession
- Cc) Hardness and Precession
- Dd) The only main property is Precession
13Rigidity:
- Aa) Is the resistance of the spin axis to stop tilting
- Bb) If it increases, the necessary torque to tilt a body decreases
- Cc) Coincides with the angular momentum
- Dd) All of the above are true
14The degrees of freedom of a gyroscope are known as:
- Aa) Spinning and Tilting
- Bb) Spinning and Precessing
- Cc) Spinning, Tilting and Veering
- Dd) Spinning, Tilting and Precessing
15What is the main disadvantage of Air Driven Gyroscopes?
- Aa) Their maintenance is expensive
- Bb) Their electrical motor do not work at high altitudes
- Cc) Depend on the aircraft hydraulics
- Dd) Problems at high altitude to get high rotational speeds due to lower density
16What kind of Wander is due to the transport of the gyroscope along a parallel?
- Aa) Real wander
- Bb) Apparent wander
- Cc) Transport wander
- Dd) Precessing wander
17Choose the correct one:
- Aa) Compass is a radio navigation aid that helps us to know the correct direction
- Bb) In an Air Driven Gyroscope, there is a rotor with holes or ranures to generate
movement and suction is made in the box where the gyroscope is placed - Cc) Real wander, fake wander, apparent wander, transport wander and transport
grind wander are all types of gyro wander. - Dd) All the answers are correct
18According to the priority, which is NOT included as a type of warning?
- AWarning
- BCaution
- CAdvisory
- DThreat
19If an aircraft is flying on a cruise to FL320 and M0.56 under a pressure of 280 mb:
- Aa) If gyro and compass mark differently, the pilot must obey the compass
- Bb) If gyro and compass mark differently, the pilot must obey the gyro because it is a
more modern instrument - Cc) The compass will be continuously rotating due to the high altitude
- Dd) Under these conditions the only reliable instrument in the plane is the GPS
20The Altitude Alert System (AAS):
- AProvides both aural and visual warnings of an aircraft reaching, or deviating from a preselected altitude
- BIt only provides aural warnings of an aircraft reaching, or deviating from a preselected altitude
- CIt only provides visual warnings of an aircraft reaching, or deviating from a preselected altitude
- DProvides aural and visual warnings of an aircraft in order to avoid other aircrafts
21How could we correct the error in a gyro?
- Aa) Horizontality by hand with a roulette wheel or enslaving the gyro to the compass
- Bb) Verticality could be fixed with a pendulum mechanism
- Cc) A) and B) are correct
- Dd) Modern gyros do not suffer from topple on vertical component, just suffer drift on
the horizontal component
22From the Ground Proximity Warning System (GPWS):
- AThe data is based on the radio altimeter.
- BAs long as the data is based on the radio altimeter and barometric rate of change of height, there is no info about rising ground rising directly ahead of the aircraft.
- CRate of change of height is based on temperature variation.
- DIt only works when autopilot is connected.
23Choose the correct one:
- Aa) In slave mode, the gyro presents the information by self-correcting it with the
compass. - Bb) In DG / FREE mode, it is necessary to correct the gyro with the compass indications
- Cc) In compass mode, the pointer will be continuously oscillating, the information
comes only from the compass - Dd) All the answers are correct
- Aa) In slave mode, the gyro presents the information by self-correcting it with the
24Which statement is FALSE about radio altimeter:
- AIt determines instantaneous altitude of the aircraft above the terrain.
- BIt makes use of the “frequency modulated ranging”.
- CIt makes use of barometric pressure.
- DIt uses a modulated continuous wave.
25Turn indicator displays the rate of, and direction of turn, using gyroscopic principles:
- Aa) Turn indicator moves when Roll
- Bb) Turn indicator moves when Yaw
- Cc) Turn indicator moves when Pitch
- Dd) Turn indicator moves when Roll or Yaw but doesn´t with pitch
26About the “frequency modulated ranging” used by radar altimeter:
- AThe associated time difference signal is proportional to the range of the target.
- BIt consist on a discontinuous wave.
- CThe associated wave length signal is proportional to the range of the target.
- DIt consists on a continuous with continuous frequency.
27Choose the false one:
- Aa) Turn co-ordinator is a turn, balance, and attitude indicator
- Bb) In the Inertial Navigation System the velocity and position of the aircraft is
obtained by measuring its acceleration and integrating it twice. - Cc) In Air Driven Gyroscopes, suction is made in the box where the gyroscope is placed
- Dd) Gyros design is looking forward for high rigidity
28Which of the following is NOT an input for the Ground Proximity Warning System (GPWS):
- ARadar altimeter.
- BPressure altitude.
- CPosition related to ILS glide path.
- DLights
29About deviation correction:
- Aa) It is particular for each plane because each aircraft creates its own magnetic
field, the objective is to eliminate that error. - Bb) It is impossible to calculate the correction if gyro is working on slave mode
- Cc) All the aircrafts create the same magnetic field. It depends on the altitudes
- Dd) Any answer is correct
- Aa) It is particular for each plane because each aircraft creates its own magnetic
30Which is not a mandatory mode of the Ground Proximity Warning System (GPWS):
- AMODE 1: Excessive descent rate
- BMODE 2: Excessive terrain closure rate.
- CMODE 5: Below glide slope deviation.
- DMODE 7: Windshear.
31About artificial horizon mechanism:
- Aa) In equilibrium the two slots are covered equally
- Bb) In turn, one is almost free and the other almost covered. There comes sucking air.
- Cc) Since the flow is not the same, a net force is created in the direction of the closed
groove, therefore a moment is created, and the verticality is recovered. - Dd) All the answers are correct
32The Enhanced Ground Proximity Warning System (EGPWS):
- AIt is an evolution of the GPWS to reduce controlled flight into terrain (CFIT) accidents.
- BIt introduces additional elements: world terrain database, airstrips database and need of high precision positioning systems.
- CSome additional functions that are introduced are terrain clearance floor and terrain display system.
- DAll are correct.
331. The code which must be used in powerplant instruments is:
- Aa) Red (maximum and minimum values), green (normal operation values), yellow (take off, caution or exceptional values)
- Bb) There is no code
- Cc) Red (maximum and minimum values), green (take off, caution or exceptional values), yellow (normal operation values)
- Dd) Red (normal operation values), green (take off, caution or exceptional values), yellow (maximum and minimum values)
34About ELECTRIC PRESSURE SENSORS:
- Aa) The Inductive works between 2.5 and 70 Mpa
- Bb) The Inductive works between 2.5 and 70 pa
- Cc) The Capacitive works between 2.5 and 70 Mpa
- Dd) The Capacitive works between 2.5 and 70 pa
35About MECHANICAL PRESSURE SENSORS:
- Aa) The Bourdon tube is used for low pressures
- Bb) The Bourbon tube is used for high pressures
- Cc) Mechanical pressure sensors don´t exist
- Dd) A and B are FALSE
36Choose the wrong answer
- Aa) EGT means Eshaust Gas Temperature
- Bb) EGT means Elevate Gas Temperature
- Cc) ITT means Internal Turbine Temperature
- Dd) JPT means Jet Pipe Temperature
37The TACHOMETER is an instrument that measures:
- Aa) The drag produced by the aircraft
- Bb) The lift produced by the aircraft
- Cc) The speed of the aircraft
- Dd) The engine RPM
386. Propeller Auxiliary Systems are:
- Aa) Systems to increase the efficiency of the propeller operation, and to provide automatic operation of the Constant Speed Unit and feathering mechanisms
- Bb) Systems to reduce the efficiency of the propeller operation, and to provide automatic operation of the Constant Speed Unit and feathering mechanisms
- Cc) Systems to increase the efficiency of the propeller operation, and not to provide automatic operation of the Constant Speed Unit and feathering mechanisms
- Dd) Systems to reduce the efficiency of the propeller operation, and not to provide automatic operation of the Constant Speed Unit and feathering mechanisms
39Any change in vibration of the engine could produce a problem caused by:
- Aa) Damaged compressor/turbine Blades
- Bb) Uneven temperatura distribution around turbine Blades
- Cc) A and B are TRUE
- Dd) A and B are FALSE
40Which one is a type of fuel flow metering system:
- Aa) Venturi tube
- Bb) Rotanting vane
- Cc) Impeller or integrated type
- Dd) All the above
41When performing a tactical ascent in the A-400, a constant TAS of 300 Kts is set in the
autopilot. Choose the right answer:- AMach will remain constant and CAS will be lower, compared to the TAS.
- BBoth IAS and Mach will be lower than the TAS.
- CCAS will be lower and Mach will be higher, compared to the TAS.
- DBoth IAS and Mach will be higher than the TAS.
42Assuming that a descent is performed at a set Mach number; choose the wrong answer:
- AThe local speed of sound depends on the temperature.
- BBoth CAS and TAS will increase, compared to the Mach number.
- CBoth IAS and TAS will increase, compared to the Mach number.
- DCAS will decrease and TAS will increase, compared to the Mach number.
43Regarding airspeed indicator (ASI) blockages and leaks of the static and pitot lines; choose the
wrong answer:- AA blockage of the pitot line when climbing leads to an overread (the airspeed shown is
higher than the actual airspeed). - BA blockage of the static line when descending leads to an underread (the airspeed
shown is lower than the actual airspeed). - CA leak in the pitot line will always lead to an underread.
- DA leak in the static line may lead to an overread.
- AA blockage of the pitot line when climbing leads to an overread (the airspeed shown is
44Airspeed indicator (ASI) displays are usually color-coded. Choose the right answer:
- AASI displays are limited to showing indicated airspeed.
- BThe red line is the never-exceed airspeed (Vne).
- CThe green arc ends in the maximum flap extended speed (Vfe).
- DThe white arc starts in the maximum structural cruising speed (Vno).
45With respect to airspeed indicator (ASI) faults; choose the wrong answer:
- AOver-reading (showing an airspeed higher than the actual airspeed) could lead to a
stall. - BUnder-reading (showing an airspeed lower than the actual airspeed) could lead to an
overspeed. - CIn pressurized cabins, where ambient pressure is lower than the one inside the aircraft,
a leaking static line leads to an overread. - DBlockages of the pitot line may lead to speed variation indications when changing
altitude.
- AOver-reading (showing an airspeed higher than the actual airspeed) could lead to a
46Regarding Vertical Speed Indicators (VSIs) and Instantaneous Vertical Speed Indicators (IVSIs);
choose the right answer:- AThe internal mechanics of the IVSI allow it to solve the problems that lag and g-forces
create in the VSI. - BThe calibrated leak of the IVSI prevents the pressure inside the instrument from
changing instantaneously. - CAnswer b) is correct. Also, it uses an accelerometer unit to create a slower differential
pressure effect. - DThe VSI works by a diaphragm which expands or contracts during changes in static
pressure.
- AThe internal mechanics of the IVSI allow it to solve the problems that lag and g-forces
47The Instantaneous Vertical Speed Indicators (IVSIs) was designed to overcome certain
limitations in the Vertical Speed Indicators (VSIs). Choose the wrong answer:- AIt uses two cylinders with pistons that respond to nose up and nose down movements,
respectively. - BWhile highly reduced, lag is still a problem.
- CIt is affected by acceleration forces (g-forces).
- DAnswer c) is correct and an example would be when turning (turning error).
- AIt uses two cylinders with pistons that respond to nose up and nose down movements,
48In large aircrafts, Central Air-Data Computers (CADCs) or Digital Air-Data Computers (DADCs)
are essential for accurate measurements. Choose the wrong answer:- ATransducers to convert physical signals into electronic signals are limited to DADCs.
- BThe CADCs use an I-bar, E-bar mechanism.
- CThe main tubes for pressure measurement in large aircraft may lead to pressure losses
and errors. - DCapacitive, inductive, piezoelectric or potentiometric are some of the types of
transducer that DADCs use.
49Select the correct affirmation about Inertial Navigation Systems (INS):
- AIt doesn't require outter measures, so it can work 24/7 in any weather.
- BThe error is cumulative.
- CIf enough time is measured, error may become considerably great.
- DAll of the above are correct.
50A mechanical accelerometer:
- AIncludes 2 springs and a weight.
- BThe acceleration is related to the elongation of the springs.
- CNowadays is not usually implemented on aircrafts.
- DAll of the above are correct.
51A laser is...
- Aa dichromatic light beam that has been polarized at a single frequency.
- Ba dichromatic light beam that has been polarized at multiple frequencies.
- Ca monochromatic light beam that has been polarized at a single frequency.
- Da monochromatic light beam that has been polarized at multiple frequencies.
52Current aircrafts tend to implement a __________ accelerometer.
- ALaser ring.
- BMechanical.
- CBased on gas expansion.
- DDouble effect.
53The delay caused on a splitted beam when rotating a mirror ring/frame is known as:
- AMandela's effect.
- BEinstein's effect.
- CSagnac's effect.
- DMohombi's effect.
54What does INS stands for?
- AIndependent Nitrogen Surfaces.
- BInertial Notorious Systems.
- CInertial Navigation Systems.
- DIndividual Nation Secretary.
55The gyroscopes on the Inertial Navigation Systems...
- Aa - Move along with the plane.
- Bb - Are enough for the measures (no outter measures required).
- Cc - Only move in 1 axis.
- Dd - a and b are correct.
56The right order of these gyroscopes, according to precision is:
- AOptical Fiber Gyroscope, Laser Ring Gyroscope, Mechanical Gyroscope.
- BOptical Fiber Gyroscope, Mechanical Gyroscope, Laser Ring Gyroscope.
- CLaser Ring Gyroscope, Optical Fiber Gyroscope, Mechanical Gyroscope.
- DLaser Ring Gyroscope, Mechanical Gyroscope, Optical Fiber Gyroscope.
57In which transponder mode is Tcas available:
- Aa. B
- Bb. C
- Cc. X
- Dd. D
58Information display tcas types:
- Aa. specialized resolution advisory
- Bb. vertical speed indicator
- Cc. Accoustic warnings
- Dd. all of above are correct
59Purpose of tcas:
- Aa. knowing the position of every aircraft
- Bb. avoiding collisions
- Cc. getting easier communications
- Dd. all of above are correct
60Which of these are a flight data recorder component:
- Aa. orange or yellow box
- Bb. cameras
- Cc. accelerometers
- Dd. A and C are correct
61What does torque mean?
- Aa. propeller effect over fuselaje
- Bb. stall attitude effect
- Cc. loss of elevon control
- Dd. roll of propeller
62Where is the stall warning the “Enaer-Pillan” holded?
- Aa. wing
- Bb. fuselage
- Cc. cockpit
- Dd. tail
63Monitored variables in gas turbine engines:
- Aa. Egt
- Bb. Torque
- Cc. Rpm
- Dd. A and C are correct
64Types of pressure indicators:
- Aa. Manifold pressure
- Bb. engine pressure ratio
- Cc. fuel and oil pressures
- Dd. all of above are correct
65Any change in vibration of the engine could produce a problem caused by:
- Aa) Damaged compressor/turbine Blades
- Bb) Uneven temperatura distribution around turbine Blades
- Cc) A and B are TRUE
- Dd) A and B are FALSE
66Which one is a type of fuel flow metering system:
- Aa) Venturi tube
- Bb) Rotanting vane
- Cc) Impeller or integrated type
- Dd) All the above
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- Quiz on Avionica UD4, created by Miguel Angel Escudero on 01/05/2020.
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- Miguel Angel Escudero
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