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INST-BNC TOTAL THEORY-MODULE1
1.
In standard atmosphere, when descending at constant CAS:
a) TAS first increases and then remains constant above the tropopause.
b) TAS remains constant.
c) TAS increases.
d) TAS decreases.
2.
The principle of capacity gauges is based on the:
a) capacitance variation by the volume measurement carried out on the sensor.
b) flow rate and torque variation occurring in a supply line.
c) current variation in the Wheatstone bridge.
d) capacitance variation of a given capacitor with the type of dielectric.
3.
Flight Director Information supplied by an FD computer is presented in the form of command bars on the following instrument:
a) HSI Horizontal Situation Indicator.
b) ADI Attitude Director Indicator.
c) BDHI Bearing Distance Heading Indicator.
d) RMI Radio Magnetic Indicator.
4.
In a directional gyro, gimballing errors are due to:
a) an apparent weight and an apparent vertical
b) a banked attitude
c) the aircraft's movement over the earth
d) the vertical component of the earth's magnetic field
5.
When climbing at a constant Mach number:
a) CAS increases.
b) CAS remains constant.
c) CAS decreases.
d) difference between surrounding conditions and ISA must be known to deduce the CAS variation.
6.
The pressure altitude is the altitude corresponding:
a) in standard atmosphere, to the reference pressure Ps.
b) in ambient atmosphere, to the reference pressure Ps.
c) in standard atmosphere, to the pressure Ps prevailing at this point.
d) in ambient atmosphere, to the pressure Ps prevailing at this point.
7.
Modern low altitude radio altimeters emit waves in the following frequency band:
a) HF (High Frequency).
b) SHF (Super High Frequency).
c) VLF (Very Low Frequency).
d) UHF (Ultra High Frequency).
8.
When flying in cold air (colder than standard atmosphere), indicated altitude is:
a) equal to the standard altitude.
b) lower than the true altitude.
c) higher than the true altitude.
d) the same as the true altitude.
9.
A leak in the pitot total pressure line of a non-pressurized aircraft to an airspeed indicator would cause it to:
a) under-read.
b) under-read in a climb and over-read in a descent.
c) over-read.
d) over-read in a climb and under-read in a descent.
10.
When flying in warm air (warmer than standard atmosphere), indicated altitude is:
a) the same as the true altitude.
b) lower than the true altitude.
c) higher than the true altitude.
d) equal to the standard altitude.
11.
While inertial platform system is operating on board an aircraft, it is necessary to use a device with the following characteristics, in order to keep the vertical line with a pendulous system:
a) with damping and a period of 84 seconds
b) without damping and a period of about 84 minutes
c) with damping and a period of about 84 minutes.
d) without damping and a period of about 84 seconds
12.
The gyroscope of a turn indicator has: (NB: the degree(s) of freedom of a gyro does not take into account its rotor spin axis.)
a) 2 degrees of freedom.
b) 3 degrees of freedom.
c) 1 degree of freedom.
d) 0 degree of freedom.
13.
The limits of the green scale of an airspeed indicator are:
a) VS1 for the lower limit and VLO for the upper limit
b) VS1 for the lower limit and VNO for the upper limit
c) VS1 for the lower limit and VNE for the upper limit
d) VS0 for the lower limit and VNO for the upper limit
14.
During descent, the total pressure probe of the airspeed indicator becomes blocked. In this case: 1 - IAS becomes greater than CAS 2 - IAS becomes lower than CAS 3 - maintaining IAS constant, VMO may be exceeded 4 - maintaining IAS constant, aircraft may stall The combination regrouping all the correct statements is:
a) 2, 3.
b) 1, 3.
c) 2, 4.
d) 1, 4.
15.
The disadvantage of an electronic rpm indicator is the:
a) influence of temperature on the indication.
b) generation of spurious signals at the commutator.
c) necessity of providing a power supply source.
d) high influence of line resistance on the indication.
16.
When an aircraft has turned 360 degrees with a constant attitude and bank, the pilot observes the following on a classic artificial horizon:
a) too much nose-up and bank correct
b) too much nose-up and bank too low
c) attitude and bank correct
d) too much nose-up and bank too high
17.
The response time of a vertical speed detector may be decreased by adding a:
a) return spring
b) second calibrated port
c) bimetallic strip
d) correction based on an accelerometer sensor.
18.
The error in altimeter readings caused by the variation of the static pressure near the source is known as:
a) hysteresis effect.
b) barometric error.
c) instrument error.
d) position pressure error
19.
During a deceleration phase at constant attitude, the control system of the artificial horizon results in the horizon bar indicating a
a) nose down attitude.
b) nose up attitude.
c) constant attitude.
d) nose up followed by a nose down attitude.
20.
A gravity type erector is used in a vertical gyro device to correct errors on:
a) an artificial horizon
b) a gyromagnetic indicator
c) a directional gyro unit
d) a turn indicator
21.
The data supplied by a radio altimeter:
a) is used only by the radio altimeter indicator.
b) indicates the distance between the ground and the aircraft.
c) concerns only the decision height.
d) is used by the automatic pilot in the altitude hold mode.
22.
The indications on a directional gyroscope are subject to errors. The most significant are: 1- apparent wander due to earth rotation. 2- apparent wander due to change of aircraft position. 3- gimballing errors. 4- north change. 5- mechanical defects. The combination regrouping the correct statement is:
a) 3,4,5.
b) 1,2,4,5.
c) 1,2,3,5.
d) 2,3,5.
23.
If the static source to an altimeter becomes blocked during a climb, the instrument will:
a) under-read by an amount equivalent to the reading at the time that the instrument became blocked
b) continue to indicate the reading at which the blockage occurred
c) over-read
d) gradually return to zero
24.
Machmeter readings are subject to:
a) temperature error.
b) density error.
c) position pressure error
d) setting error.
25.
The Primary Flight Display (PFD) displays information dedicated to:
a) systems.
b) engines and alarms.
c) piloting.
d) weather situation.
26.
A thermocouple type thermometer consists of:
a) a Wheatstone bridge connected to a voltage indicator.
b) two metal conductors of different type connected at two points.
c) two metal conductors of the same type connected at two points.
d) a single-wire metal winding.
27.
The apparent wander of a directional gyro is 15°/h:
a) At the equator
b) At the North pole
c) At the latitude 45°
d) At the latitude 30°
28.
When an aircraft has turned 90 degrees with a constant attitude and bank, the pilot observes the following on a classic artificial horizon:
a) attitude and bank correct
b) too much nose-up and bank too high
c) too much nose-up and bank too low
d) too much nose-up and bank correct
29.
If the static source of an altimeter becomes blocked during a descent the instrument will:
a) gradually indicate zero
b) continue to display the reading at which the blockage occurred
c) indicate a height equivalent to the setting on the millibar subscale
d) under-read
30.
The low-altitude radio altimeters used in precision approaches: 1 operate in the 1540-1660 MHz range. 2 are of the pulsed type. 3 are of the frequency modulation type. 4 have an operating range of 0 to 5000 ft. 5 have a precision of +/- 2 feet between 0 and 500 ft and +/- 1.5% whichever is the greatest. The combination regrouping all the correct statements is:
a) 3, 5
b) 1, 2, 5
c) 3, 4
d) 2, 3, 4
31.
In order to align an inertial reference system (IRS), it is required to insert the local geographical coordinates. This enables the IRS to:
a) initialise the FMS flight plan.
b) compare the longitude it finds with that entered by the operator.
c) compare the latitude it finds with that entered by the operator.
d) find true north.
32.
The density altitude is:
a) the altitude of the standard atmosphere on which the density is equal to the actual density of the atmosphere
b) the temperature altitude corrected for the difference between the real temperature and the standard temperature
c) the pressure altitude corrected for the density of air at this point
d) the pressure altitude corrected for the relative density prevailing at this point
33.
In standard atmosphere, when climbing at constant CAS:
a) TAS and Mach number increase.
b) TAS decreases and Mach number increases.
c) TAS and Mach number decrease.
d) TAS increases and Mach number decreases.
34.
If the outside temperature at 35 000 feet is -40°C, the local speed of sound is:
a) 307 kt.
b) 595 kt.
c) 686 kt.
d) 247 kt.
35.
The aircraft radio equipment which emits on a frequency of 4400 MHz is the:
a) weather radar.
b) primary radar.
c) radio altimeter.
d) high altitude radio altimeter.
36.
The pendulum type detector system of the directional gyro feeds:
a) a nozzle integral with the outer gimbal ring
b) a levelling erection torque motor
c) a torque motor on the sensitive axis
d) 2 torque motors arranged horizontally
37.
Concerning the directional gyro indicator, the latitude at which the apparent wander is equal to 0 is:
a) latitude 30°
b) the North pole
c) latitude 45°
d) the equator
38.
The position error of the static vent on which the altimeter is connected varies substantially with the:
a) static temperature.
b) deformation of the aneroid capsule.
c) Mach number of the aircraft.
d) flight time at high altitude.
39.
The operating frequency range of a low altitude radio altimeter is:
a) 4200 MHz to 4400 MHz.
b) 2700 MHz to 2900 MHz.
c) 5 GHz.
d) 5400 MHz or 9400 MHz.
40.
Under normal operating conditions, when an aircraft is in a banked turn, the rate-of-turn indicator indicates: 1. the angular velocity of the aircraft about the yaw axis 2. the bank of the aircraft 3. the direction of the aircraft turn 4. the angular velocity of the aircraft about the real vertical The combination regrouping all the correct statements is:
a) 1,2.
b) 2,4.
c) 3,4.
d) 1,3.
41.
When flying in cold air (colder than standard atmosphere), the altimeter will:
a) show the actual height above ground.
b) underestimate.
c) be just as correct as before.
d) overestimate.
42.
The limits of the yellow scale of an airspeed indicator are:
a) VFE for the lower limit and VNE for the upper limit
b) VNO for the lower limit and VNE for the upper limit
c) VLO for the lower limit and VNE for the upper limit
d) VLE for the lower limit and VNE for the upper limit
43.
Due to its conception, the altimeter measures a:
a) a temperature altitude
b) a true altitude
c) a pressure altitude
d) a density altitude
44.
A synchroscope is used on aircraft to:
a) reduce the rpm of each engine.
b) set several engines to the same speed.
c) achieve optimum control of on-board voltages.
d) reduce the vibration of each engine.
45.
The radio altimeter is required to indicate zero height AGL as the main wheels touch down on the runway. For this reason, it is necessary to:
a) adjust the gross height according to the aircraft instantaneous pitch.
b) have a specific radio altimeter dedicated to automatic landing.
c) compensate for residual height and cable length.
d) change the display scale in short final, in order to have a precise readout.
46.
The fields affecting a magnetic compass originate from: 1. magnetic masses 2. ferrous metal masses 3. non ferrous metal masses 4. electrical currents The combination regrouping all the correct statements is:
a) 1, 2, 3
b) 1, 3, 4
c) 1, 2, 4
d) 1, 2, 3, 4
47.
If the static source to an airspeed indicator (ASI) becomes blocked during a descent the instrument will:
a) under-read
b) continue to indicate the speed applicable to that at the time of the blockage
c) read zero
d) over-read
48.
The Engine Pressure Ratio (EPR) is computed by:
a) multiplying compressor discharge pressure by turbine inlet pressure.
b) dividing turbine discharge pressure by compressor inlet pressure.
c) multiplying compressor inlet pressure by turbine discharge pressure.
d) dividing compressor discharge pressure by turbine discharge pressure.
49.
Maintaining CAS and flight level constant, a fall in ambient temperature results in:
a) lower TAS because air density increases.
b) higher TAS because air density increases.
c) lower TAS because air density decreases.
d) higher TAS because air density decreases.
50.
A slaved directional gyro derives it's directional signal from:
a) the air-data-computer.
b) the flight director.
c) the flux valve.
d) a direct reading magnetic compass.
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