Mhafb CDC 2a051t Vol.1 Aircraft Systems

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Quizzes Created: 1 | Total Attempts: 409

Questions: 65 | Attempts: 409 | Updated: Mar 21, 2023

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Volume 1 URE Questions for 5 level CDCs

Questions and Answers

1.

(001) What is true course (TC) an expression of in aerial navigation?
- A.
  
  Time
- B.
  
  Distance
- C.
  
  Direction
- D.
  
  Distance and time
Correct Answer
C. Direction

Explanation
True course (TC) is an expression of direction in aerial navigation. It refers to the angle between the true north and the direction of the aircraft's path. TC is important for pilots to accurately navigate and maintain their desired heading during flight. By knowing the TC, pilots can make adjustments to their heading based on wind direction and speed, ensuring they stay on course and reach their intended destination.

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2.

(002) The basic operating principle of the very high frequency omnidirectional range system is the phase comparison between the
- A.
  
  30 Hz reference and 30 Hz variable signals
- B.
  
  30 Hz reference and 9960 Hz FM signals
- C.
  
  30 Hz variable and 9960 Hz FM signals
- D.
  
  90 Hz and 150 Hz modulated signals
Correct Answer
A. 30 Hz reference and 30 Hz variable signals

Explanation
The correct answer is 30 Hz reference and 30 Hz variable signals. The basic operating principle of the very high frequency omnidirectional range (VOR) system relies on the phase comparison between the 30 Hz reference signal and the 30 Hz variable signal. The VOR system uses two signals, one fixed and one rotating, to determine the aircraft's bearing relative to the ground station. By comparing the phase difference between these two signals, the VOR system can accurately determine the aircraft's position and direction.

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3.

(002) In instrument landing system operation, a deflection of two dots on the attitude direction indicator glide slope deviation scale indicates the aircraft is
- A.
  
  0.25 degrees off glide path
- B.
  
  2.5 degrees off glide path
- C.
  
  0.6 degrees off glide path
- D.
  
  6.0 degrees off glide path
Correct Answer
C. 0.6 degrees off glide path

Explanation
A deflection of two dots on the attitude direction indicator glide slope deviation scale indicates that the aircraft is 0.6 degrees off the glide path.

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4.

(003) What is used to guide the aircraft during an instrument approach to the active runway?
- A.
  
  Microwave landing system (MLS) back azimuth transmitter
- B.
  
  MLS approach azimuth transmitter
- C.
  
  Glide slope
- D.
  
  Localizer
Correct Answer
B. MLS approach azimuth transmitter

Explanation
The MLS approach azimuth transmitter is used to guide the aircraft during an instrument approach to the active runway. The MLS system provides precise azimuth and elevation guidance to the pilot, allowing them to maintain the correct approach path. The transmitter sends signals to the aircraft's receiver, which displays the information on the instrument panel. This helps the pilot align the aircraft with the runway and descend at the correct angle for a safe landing. The MLS approach azimuth transmitter is an essential component of instrument landing systems used in aviation.

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5.

(004) The tactical air navigation (TACAN) bearing, selected course, and range are displayed on the
- A.
  
  Attitude direction indicator
- B.
  
  Digital electronics display
- C.
  
  Horizontal situation indicator
- D.
  
  Standby attitude indicator
Correct Answer
C. Horizontal situation indicator

Explanation
The horizontal situation indicator (HSI) is a primary flight instrument that displays the aircraft's heading, course deviation, and navigation information. It is commonly used in aviation to provide pilots with a clear and intuitive representation of their position relative to their intended course. The TACAN bearing, selected course, and range are important navigation parameters that are typically displayed on the HSI, making it the correct answer. The attitude direction indicator (ADI) primarily displays the aircraft's pitch and roll attitude, while the standby attitude indicator is a backup instrument for attitude information. The digital electronics display is a generic term and does not specifically refer to a navigation instrument.

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6.

(004) The typical tactical air navigation (TACAN) system consists of
- A.
  
  Airborne interrogator-receiver and a surface beacon (UHF range)
- B.
  
  Airborne interrogator-receiver and a surface beacon (VHF range)
- C.
  
  Airborne beacon and surface interrogator-receiver (HF range)
- D.
  
  Airborne beacon and surface interrogator-receiver (LF range)
Correct Answer
A. Airborne interrogator-receiver and a surface beacon (UHF range)

Explanation
The correct answer is airborne interrogator-receiver and a surface beacon (UHF range). This is because the TACAN system uses UHF (Ultra High Frequency) range for communication between the airborne interrogator-receiver and the surface beacon. The interrogator-receiver sends out signals to the beacon, which then responds with distance and bearing information to the aircraft. This UHF range allows for accurate and reliable navigation in both military and civil aviation applications.

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7.

(004) The aircrafts compass is designed to align itself with
- A.
  
  The earth's horizontal magnetic field
- B.
  
  The earth's vertical magnetic field
- C.
  
  The north and south poles
- D.
  
  True north
Correct Answer
A. The earth's horizontal magnetic field

Explanation
The aircraft's compass is designed to align itself with the earth's horizontal magnetic field. This is because the compass needle is a magnet that is free to rotate and it aligns itself with the magnetic field lines of the earth. The horizontal component of the earth's magnetic field allows the compass to point towards the magnetic north, which is close to but not exactly the same as true north. This alignment is crucial for pilots to navigate accurately and maintain their heading during flight.

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8.

(005) What type of error is caused by misalignment of the magnetic azimuth detector during installation?
- A.
  
  Index
- B.
  
  Coriolis
- C.
  
  Hard iron
- D.
  
  Transmission
Correct Answer
A. Index

Explanation
Misalignment of the magnetic azimuth detector during installation can cause an index error. This means that the readings from the detector will not accurately represent the true magnetic azimuth, leading to incorrect navigation or measurement.

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9.

(006) What are the two types of inertial navigation system integrators?
- A.
  
  Analog and digital
- B.
  
  Motion and velocity
- C.
  
  Electrical and mechanical
- D.
  
  Acceleration and directional
Correct Answer
A. Analog and digital

Explanation
Inertial navigation system integrators can be categorized into two types: analog and digital. Analog integrators process the input signals using continuous electrical signals, while digital integrators process the input signals using discrete numerical values. Both types of integrators are used in inertial navigation systems to calculate and integrate the inputs of acceleration and directional data, allowing for accurate navigation and positioning.

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10.

(006) What component is the heart of the F-16 inertial navigation unit (INU)?
- A.
  
  Computer
- B.
  
  Integrator
- C.
  
  Stabilized platform
- D.
  
  Performance monitor
Correct Answer
C. Stabilized platform

Explanation
The stabilized platform is the heart of the F-16 inertial navigation unit (INU). It is responsible for maintaining a stable reference frame for the navigation system, even in the presence of aircraft motion and vibrations. The platform is designed to isolate the sensors from external disturbances, ensuring accurate and reliable navigation data. It plays a crucial role in providing precise position, velocity, and attitude information to the aircraft's computer system, enabling accurate navigation and targeting capabilities.

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11.

(007) The global positioning system (GPS) data provides all except
- A.
  
  Time of day
- B.
  
  Aircraft identification
- C.
  
  Have-quick synchronization
- D.
  
  Correction for in-flight internal navigation system (INS) alignment
Correct Answer
B. Aircraft identification

Explanation
GPS data provides various information, including the time of day, have-quick synchronization, and correction for in-flight INS alignment. However, it does not provide aircraft identification. This means that while GPS can provide accurate positioning and timing information, it does not directly identify the specific aircraft using the system.

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12.

(007) in an embedded global positioning system, a Kalman filter is used to model errors in
- A.
  
  Latitude and longitude
- B.
  
  Velocity and postion
- C.
  
  Altitude and attitude
- D.
  
  Pitch and roll
Correct Answer
B. Velocity and postion

Explanation
In an embedded global positioning system, a Kalman filter is used to model errors in velocity and position. The Kalman filter is a mathematical algorithm that combines measurements from different sensors to estimate the true state of a system. In the case of a GPS system, the Kalman filter takes into account the measurements of velocity and position, along with other factors such as acceleration and time, to provide a more accurate estimation of the actual velocity and position of the object being tracked.

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13.

(008) The operational range of the combined altitude radar altimeter is
- A.
  
  0-1,000 feet
- B.
  
  0-2,000 feet
- C.
  
  0-5,000 feet
- D.
  
  0-50,000 feet
Correct Answer
D. 0-50,000 feet

Explanation
The correct answer is 0-50,000 feet. The operational range of the combined altitude radar altimeter is the maximum altitude that the altimeter can accurately measure. In this case, the altimeter can accurately measure altitudes from 0 feet up to 50,000 feet.

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14.

(009) on the combined altitude radar altimeter, an intermediate frequency of 495 kHz can represent
- A.
  
  One altitude
- B.
  
  Two altitudes
- C.
  
  Six altitudes
- D.
  
  Seven altitudes
Correct Answer
D. Seven altitudes

Explanation
On the combined altitude radar altimeter, an intermediate frequency of 495 kHz can represent seven altitudes. This means that the altimeter is capable of detecting and displaying seven different altitude levels based on the received frequency. Each frequency corresponds to a specific altitude, allowing the pilot or operator to accurately determine their altitude based on the displayed frequency.

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15.

(010) What is the term for random or unintentional electron movement?
- A.
  
  Noise
- B.
  
  Distortion
- C.
  
  Modulation
- D.
  
  Heterodyning
Correct Answer
A. Noise

Explanation
Noise refers to random or unintentional electron movement. In electronic systems, noise can be caused by various factors such as thermal agitation, interference, or imperfections in components. This random movement of electrons can introduce unwanted signals or disturbances into a system, affecting its performance and accuracy. Therefore, noise is the correct term for random or unintentional electron movement.

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16.

(011) What process lowers a frequency while retaining the intelligence carried on that frequency?
- A.
  
  Frequency conversion
- B.
  
  Heterodyning
- C.
  
  Demodulation
- D.
  
  Modulation
Correct Answer
B. Heterodyning

Explanation
Heterodyning is the process that lowers a frequency while retaining the intelligence carried on that frequency. It involves combining the original signal with a local oscillator signal to create two new signals, one with a higher frequency and one with a lower frequency. The lower frequency signal retains the original intelligence, allowing it to be processed or transmitted more effectively. This technique is commonly used in radio communication and signal processing systems.

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17.

(011) which component's function is to radiate and collect radio frequency (RF)
- A.
  
  Antenna
- B.
  
  Speaker
- C.
  
  Amplifier
- D.
  
  Microphone
Correct Answer
A. Antenna

Explanation
The antenna is responsible for radiating and collecting radio frequency (RF) signals. It is designed to transmit and receive electromagnetic waves, allowing for the transmission and reception of RF signals. The other options, such as the speaker, amplifier, and microphone, are not specifically designed for this purpose. The speaker is used to produce sound, the amplifier is used to increase the amplitude of electrical signals, and the microphone is used to convert sound waves into electrical signals. Therefore, the correct answer is antenna.

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18.

(012) What is the frequency range of the ultrahigh frequency (UHF) radio system?
- A.
  
  2.2500 to 3.9997 MHz
- B.
  
  22.500 to 39.997 MHz
- C.
  
  225.000 to 399.975 MHz
- D.
  
  2250.00 to 3999.75 MHz
Correct Answer
C. 225.000 to 399.975 MHz

Explanation
The correct answer is 225.000 to 399.975 MHz. This frequency range is commonly used for ultrahigh frequency (UHF) radio systems. It falls within the range of UHF frequencies, which typically range from 300 MHz to 3 GHz. UHF frequencies are commonly used for various applications such as television broadcasting, mobile communication, and wireless data transmission.

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19.

(013) the very high frequency (VHF) communicaton system provides clear-voice, two-way communication with what type of modulation?
- A.
  
  AM only
- B.
  
  AM and FM
- C.
  
  Pulse and AM
- D.
  
  Pulse and FM
Correct Answer
B. AM and FM

Explanation
The VHF communication system provides clear-voice, two-way communication using both AM (Amplitude Modulation) and FM (Frequency Modulation) modulation techniques. AM modulation involves varying the amplitude of the carrier wave to transmit information, while FM modulation involves varying the frequency of the carrier wave. Using both AM and FM modulation allows for a more reliable and high-quality communication system.

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20.

(012) what frequency is displayed when the radio set control switch is set to GUARD?
- A.
  
  225 MHz
- B.
  
  234 MHz
- C.
  
  243 MHz
- D.
  
  325 MHz
Correct Answer
C. 243 MHz

Explanation
When the radio set control switch is set to GUARD, the displayed frequency is 243 MHz.

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21.

(014) the amount of high-frequency wave refaction is directly proportional to the
- A.
  
  Signal frequency and indirectly proportional to the wavelength
- B.
  
  Signal wavelength and indirectly proportional to the frequency
- C.
  
  Transmitter power and indirectly proportional to antenna height
- D.
  
  Antenna height and indirectly proportional to the transmitter power
Correct Answer
B. Signal wavelength and indirectly proportional to the frequency

Explanation
The amount of high-frequency wave refraction is directly proportional to the signal wavelength and indirectly proportional to the frequency. This means that as the wavelength of the signal increases, the amount of refraction also increases. On the other hand, as the frequency of the signal decreases, the amount of refraction increases. This relationship is important to understand in order to predict and analyze the behavior of high-frequency waves in different environments.

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22.

(015) with single-sideband modulation, what signal(s) get s discarded?
- A.
  
  Carrier only
- B.
  
  Upper sideband only
- C.
  
  Lower sideband only
- D.
  
  Carrier and one sideband
Correct Answer
D. Carrier and one sideband

Explanation
With single-sideband modulation, the carrier and one sideband are discarded. Single-sideband modulation is a technique used to transmit information using only one sideband of the carrier signal, while the other sideband and the carrier itself are suppressed. This is done to conserve bandwidth and improve efficiency in signal transmission. By discarding the carrier and one sideband, the remaining sideband carries the necessary information for communication.

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23.

(015) and antenna coupler is required for high-frequency transmissions to
- A.
  
  Allow the transmission of the center frequency and carrier signal from one antenna
- B.
  
  Match the impedance of the antenna to the selected frequency
- C.
  
  Compensate for the degree of atmospheric ionization
- D.
  
  Allow the use of multiple antennas
Correct Answer
B. Match the impedance of the antenna to the selected frequency

Explanation
An antenna coupler is required for high-frequency transmissions to match the impedance of the antenna to the selected frequency. Impedance matching is important because it ensures maximum power transfer between the transmitter and the antenna. If the impedance of the antenna is not matched to the selected frequency, there will be a mismatch and a significant amount of power will be reflected back to the transmitter, resulting in inefficient transmission. Therefore, an antenna coupler is used to adjust the impedance of the antenna to match the selected frequency, allowing for optimal transmission of the center frequency and carrier signal.

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24.

(016) which is not a major component of the AN/ARC-190 radio system?
- A.
  
  High-frequency receiver
- B.
  
  Receiver-transmitter
- C.
  
  Radio set control
- D.
  
  Antenna coupler
Correct Answer
A. High-frequency receiver

Explanation
The AN/ARC-190 radio system consists of several major components, including a receiver-transmitter, radio set control, and antenna coupler. However, the high-frequency receiver is not a major component of this system.

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25.

(016) how many high-frequency channels can be selected from the AN/ARC-190 radio set control?
- A.
  
  29 (0-29)
- B.
  
  29 (01-29)
- C.
  
  30 (00-29)
- D.
  
  30 (01-30)
Correct Answer
C. 30 (00-29)

Explanation
The correct answer is 30 (00-29). This indicates that there are a total of 30 high-frequency channels that can be selected from the AN/ARC-190 radio set control. The range of channels starts from 00 and goes up to 29, allowing for a selection of 30 different channels.

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26.

(017) in the intercommunications system, which type of communication does not require the use of a push-to-talk switch to activate the microphone (MIC)?
- A.
  
  CALL
- B.
  
  HOT-MIC
- C.
  
  EXTERNAL
- D.
  
  INTERPHONE
Correct Answer
B. HOT-MIC

Explanation
A "HOT-MIC" communication in the intercommunications system does not require the use of a push-to-talk switch to activate the microphone (MIC). This means that the microphone is always active and transmitting sound, allowing for continuous communication without the need to press a button to speak.

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27.

(017) which best describes the intercommunication sysetem audio common ground?
- A.
  
  Used for noise reduction
- B.
  
  Primarily used to prevent shock
- C.
  
  Connected close to each line replaceable unit
- D.
  
  Completes the path for current back to the power source
Correct Answer
A. Used for noise reduction

Explanation
The intercommunication system audio common ground is used for noise reduction. This means that it helps to minimize or eliminate any unwanted or disruptive sounds that may be present in the audio signal. By providing a common ground reference point, the system can effectively reduce any interference or disturbances that could affect the quality of the audio transmission.

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28.

(018) the intercommunication system has power whenever there is aircraft power and the intercommunication
- A.
  
  Circuit breakers are closed
- B.
  
  Station rotary select is set to operate
- C.
  
  Monitor panel pushbutton is engaged
- D.
  
  Set control master switch is depressed
Correct Answer
A. Circuit breakers are closed

Explanation
The intercommunication system in an aircraft requires power to function properly. This power is provided whenever there is aircraft power, meaning that the aircraft's electrical system is active. However, simply having aircraft power is not enough for the intercommunication system to work. The circuit breakers, which protect the system from electrical overload, must also be closed. This ensures that the electrical current can flow through the system without interruption. Therefore, the correct answer is that the intercommunication circuit breakers are closed.

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29.

(019) what type of satellites has circular equatorial orbits and appears stationary with respect to a point on earth?
- A.
  
  Active
- B.
  
  Passive
- C.
  
  Geosynchronous
- D.
  
  Nongeosynchronous
Correct Answer
C. Geosynchronous

Explanation
Geosynchronous satellites have circular equatorial orbits and appear stationary with respect to a point on Earth. This means that they orbit the Earth at the same rate that the Earth rotates, allowing them to remain fixed above a specific location on the planet's surface. This characteristic makes them ideal for applications such as weather monitoring, communication, and broadcasting, as they can provide continuous coverage of a specific area.

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30.

(019) what does a satellite do with the signal it receives before it retransmits it back to earth?
- A.
  
  Removes the sidebands
- B.
  
  Removes the center frequency
- C.
  
  Filters, amplifies, and up converts.
- D.
  
  Down converts, amplifies, and up converts
Correct Answer
D. Down converts, amplifies, and up converts

Explanation
A satellite down converts, amplifies, and up converts the signal it receives before retransmitting it back to Earth. Down conversion is the process of converting the received signal from a higher frequency to a lower frequency for easier processing. Amplification is necessary to strengthen the signal and compensate for any loss during transmission. Finally, up conversion is done to convert the signal back to the original frequency before transmitting it back to Earth. This process ensures that the signal is properly processed and optimized for transmission.

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31.

(020) what is the digital teletype data-rate capability of the Single Integrated Operational Plan terminal?
- A.
  
  75-bits per second (bps)
- B.
  
  300 bps
- C.
  
  33.6-kilobits per second (Kbps)
- D.
  
  56 Kbps
Correct Answer
A. 75-bits per second (bps)

Explanation
The correct answer is 75-bits per second (bps). This data-rate capability refers to the maximum speed at which the Single Integrated Operational Plan terminal can transmit digital teletype data.

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32.

(020) which AN/ASC-19 conponent has the selector switch that transfers control to the satellite terminal?
- A.
  
  Printer
- B.
  
  Mini input/output keyboard
- C.
  
  Satellite communications control panel
- D.
  
  Ultra high frequency line-of-sight radio AN/ARC-171(v)
Correct Answer
C. Satellite communications control panel

Explanation
The correct answer is the satellite communications control panel. This component of the AN/ASC-19 system includes a selector switch that allows control to be transferred to the satellite terminal.

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33.

(021) a true statement concerning satellite channel allocation is that the channels are
- A.
  
  Preassigned
- B.
  
  Assigned randomly
- C.
  
  Assigned on the basis of current need and priorities
- D.
  
  Are assigned on the basis of current location of the aircraft
Correct Answer
C. Assigned on the basis of current need and priorities

Explanation
The correct answer is that satellite channels are assigned on the basis of current need and priorities. This means that the allocation of channels is determined by the specific requirements and priorities at a given time. It ensures that the channels are utilized efficiently and effectively based on the immediate needs and priorities of the satellite system. This approach allows for flexibility and adaptability in channel allocation, ensuring optimal performance and resource allocation.

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34.

(022) the selective identification feature (SIF) is used
- A.
  
  Whenever search radar requests additional information
- B.
  
  When broadcasting warning signals to a particular aircraft
- C.
  
  If the target aircraft does not respond ot IFF interrogation
- D.
  
  To determine azimuth and identification of the target aircraft
Correct Answer
D. To determine azimuth and identification of the target aircraft

Explanation
The selective identification feature (SIF) is used to determine the azimuth and identification of the target aircraft. This feature helps in distinguishing between friendly and hostile aircraft by sending out a coded signal and receiving a response from the target aircraft's transponder. By analyzing the response, the radar system can determine the direction (azimuth) from which the signal is coming and identify the target aircraft. This information is crucial for air traffic control and military operations to ensure the safety and security of airspace.

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35.

(022) what identifies the equipment that transmits the altitude of the airborne identification friend or foe/selective identification features (IFF/SIF)?
- A.
  
  Encoding scalers
- B.
  
  Decoding scalers
- C.
  
  Altitude digitizers
- D.
  
  Altitude coder
Correct Answer
C. Altitude digitizers

Explanation
Altitude digitizers are the equipment that transmits the altitude of the airborne identification friend or foe/selective identification features (IFF/SIF). These digitizers are responsible for converting the analog altitude data into digital form, allowing it to be transmitted and processed by other systems. Encoding scalers and decoding scalers are not specifically designed for transmitting altitude data, and an altitude coder is not a commonly used term in this context. Therefore, altitude digitizers are the correct answer for identifying the equipment used for transmitting airborne altitude information.

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36.

Which mode of operation is used for security identity?
- A.
  
  Mode 1
- B.
  
  Mode 2
- C.
  
  Mode 3/A
- D.
  
  Mode 4
Correct Answer
A. Mode 1

Explanation
Mode 1 is used for security identity.

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37.

(024) the angle of attack of an aircraft wing is the angle
- A.
  
  Between the chord line and true heading
- B.
  
  Between the chord line and the direction of relative wind
- C.
  
  Of elevation between the aircraft pitch line and the target
- D.
  
  Beween the aircraft pitch line and the surface of the earth
Correct Answer
B. Between the chord line and the direction of relative wind

Explanation
The angle of attack of an aircraft wing is the angle between the chord line and the direction of relative wind. The chord line is an imaginary line that connects the leading edge to the trailing edge of the wing. The relative wind is the airflow that is encountered by the wing as the aircraft moves through the air. The angle of attack is important because it determines the lift generated by the wing. A higher angle of attack can increase lift but may also lead to increased drag and potential stall conditions.

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38.

(025) Which axis extends lengthwise through the fuselage from the nose to the tail of an aircraft?
- A.
  
  Lateral
- B.
  
  Vertical
- C.
  
  Horizontal
- D.
  
  Longitudinal
Correct Answer
D. Longitudinal

Explanation
The longitudinal axis extends lengthwise through the fuselage from the nose to the tail of an aircraft. This axis is responsible for controlling the pitch motion of the aircraft, allowing it to climb or descend. It is also known as the roll axis, as it is used to control the roll motion of the aircraft, allowing it to bank left or right.

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39.

(025) which of these describe yaw?
- A.
  
  Left wing down
- B.
  
  Right wing down
- C.
  
  Nose up, nose down
- D.
  
  Nose left, nose right
Correct Answer
D. Nose left, nose right

Explanation
Yaw is a term used in aviation to describe the rotation of an aircraft around its vertical axis. When an aircraft yaws, it moves its nose to the left or right. Therefore, the correct answer "nose left, nose right" accurately describes yaw as it refers to the movement of the aircraft's nose in those directions.

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40.

(026) what do stabilators on an aircraft control?
- A.
  
  Roll and yaw
- B.
  
  Pitch and yaw
- C.
  
  Pitch and roll
- D.
  
  Yaw and direction
Correct Answer
C. Pitch and roll

Explanation
Stabilators on an aircraft control the pitch and roll. Pitch refers to the up and down movement of the aircraft's nose, while roll refers to the side-to-side movement of the aircraft. Stabilators are typically found on the tail of the aircraft and can be adjusted to control the aircraft's attitude and stability during flight.

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41.

(026) what aircraft control surfaces control the movement of an aircraft about the vertical axis and produce the motion known as yaw?
- A.
  
  Wings
- B.
  
  Rudders
- C.
  
  Flaperons
- D.
  
  Elevators
Correct Answer
B. Rudders

Explanation
The correct answer is rudders. Rudders are aircraft control surfaces that control the movement of an aircraft about the vertical axis and produce the motion known as yaw. Yaw is the side-to-side movement of the nose of the aircraft. By deflecting the rudders, pilots can control the yawing motion and maintain stability during flight.

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42.

(027) what control surface is not part of the F-15 primary flight control system?
- A.
  
  Ailerons
- B.
  
  Twin ruddrs
- C.
  
  Stabilators
- D.
  
  Flaperons
Correct Answer
D. Flaperons

Explanation
The correct answer is flaperons. Flaperons are not part of the F-15 primary flight control system. Ailerons, twin rudders, and stabilators are all control surfaces that are part of the primary flight control system of the F-15. Flaperons, on the other hand, are a combination of flaps and ailerons and are typically found on aircraft with a high aspect ratio wing, but they are not used on the F-15.

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43.

(027) what F-16 flight control system (FLCS) components contains a force-sensing unit that contains transducers in both the pitch and roll axes?
- A.
  
  Stick
- B.
  
  Throttle
- C.
  
  Rudder pedals
- D.
  
  Integrated servo actuator
Correct Answer
A. Stick

Explanation
The correct answer is stick. The F-16 flight control system (FLCS) stick contains a force-sensing unit that contains transducers in both the pitch and roll axes. This means that the stick can sense the force applied by the pilot in both the forward/backward (pitch) and left/right (roll) directions, allowing for precise control of the aircraft's movements. The force-sensing unit is an important component of the FLCS, as it translates the pilot's inputs into commands that the aircraft's control surfaces can act upon.

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44.

(028) what is the main purpose of the air data computer (ADC)?
- A.
  
  Reduce weight and space on the aircraft
- B.
  
  Produce reference data for use by almost all other aircraft systems
- C.
  
  Mathematically convert all indicator values into usable information
- D.
  
  Genterate synchro outputs that can be sent to all the using subsystems
Correct Answer
B. Produce reference data for use by almost all other aircraft systems

Explanation
The main purpose of the air data computer (ADC) is to produce reference data for use by almost all other aircraft systems. This means that the ADC collects and processes data related to airspeed, altitude, and other important parameters, and provides this information to various systems on the aircraft, such as the autopilot, navigation systems, and flight instruments. By providing accurate and reliable reference data, the ADC helps ensure the safe and efficient operation of the aircraft.

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45.

(028) what does the angle of attack (AOA) transmitter use to produce its output?
- A.
  
  Two pure platinum sensing elements
- B.
  
  A stabilized gyroscope that detects aircraft angle
- C.
  
  Two synchros that align the probe tip with the airstream
- D.
  
  A movable sensing element that routes air into two synchro cavities
Correct Answer
D. A movable sensing element that routes air into two synchro cavities

Explanation
The angle of attack (AOA) transmitter uses a movable sensing element that routes air into two synchro cavities to produce its output. This sensing element detects the angle at which the aircraft is approaching the airstream, and the air flow is directed into the synchro cavities to generate the transmitter's output. This allows the AOA transmitter to provide accurate information about the aircraft's angle of attack.

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46.

(029) what provides the aircrew with a visual pitch and roll heading and command information?
- A.
  
  Air data computer
- B.
  
  Flight instruments
- C.
  
  Inertial navigation system
- D.
  
  Flight director insruments
Correct Answer
D. Flight director insruments

Explanation
Flight director instruments provide the aircrew with a visual pitch and roll heading and command information. These instruments help the pilots maintain the desired flight path by providing guidance and commands for pitch and roll control. They display important information such as the desired heading, altitude, and vertical speed, allowing the pilots to make necessary adjustments to stay on track. Flight director instruments are essential tools for maintaining safe and accurate flight operations.

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47.

(029) what line replaceable unit (LRU) may develop errors during aerobatic maneuvering?
- A.
  
  Attitude director finder (ADI)
- B.
  
  Standby attitude indicator (SAI)
- C.
  
  Vertical velocity indicator (VVI)
- D.
  
  Horizontal situation indicator (HSI)
Correct Answer
B. Standby attitude indicator (SAI)

Explanation
During aerobatic maneuvering, the standby attitude indicator (SAI) may develop errors. This is because aerobatic maneuvers involve rapid and extreme changes in aircraft attitude and acceleration, which can cause the SAI to become inaccurate or even fail completely. The SAI is a backup instrument that provides information about the aircraft's pitch and roll, and its reliability can be affected by the high forces and G-forces experienced during aerobatic maneuvers. Therefore, it is important to regularly check and calibrate the SAI to ensure accurate and reliable information during aerobatic flight.

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48.

(030) what unit generates and overlays symbology for the F-15 head up display system?
- A.
  
  Programmable display generator
- B.
  
  Programmable display processor
- C.
  
  Multipurpose display generator
- D.
  
  Multipurpose display processor
Correct Answer
D. Multipurpose display processor

Explanation
The multipurpose display processor is the unit responsible for generating and overlaying symbology for the F-15 head-up display system. It is a versatile unit that can handle multiple tasks related to display generation and processing.

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49.

(031) what unit esablishes communications on the 1553 MUX bus in backup mode for the F-15 up-front controls?
- A.
  
  Central computer
- B.
  
  Avionics interface unit
- C.
  
  Central computer interface
- D.
  
  Multipurpose display processor
Correct Answer
D. Multipurpose display processor

Explanation
The multipurpose display processor establishes communications on the 1553 MUX bus in backup mode for the F-15 up-front controls. This means that the multipurpose display processor is responsible for maintaining communication between the various components and systems of the F-15 aircraft when the primary communication system is not available or fails. It plays a crucial role in ensuring that the up-front controls continue to function properly even in backup mode.

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50.

(032) multiplexing is best described as
- A.
  
  A way to interface multiple aircraft systems
- B.
  
  A method of communication between analog aircraft systems
- C.
  
  The concept of time-sharing communication lines on the aircraft
- D.
  
  The procedure of transmitting many digital signals over a single pair of wires
Correct Answer
D. The procedure of transmitting many digital signals over a single pair of wires

Explanation
Multiplexing refers to the process of transmitting multiple signals over a single channel or pair of wires. In this context, it specifically refers to transmitting many digital signals over a single pair of wires. This technique allows for efficient use of limited resources by combining multiple signals into one, which can then be transmitted simultaneously. By doing so, multiplexing enables increased data transmission capacity and effective communication between different digital systems using a single transmission medium.

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Oct 20, 2011

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Mhafb CDC 2a051t Vol.1 Aircraft Systems

(001) What is true course (TC) an expression of in aerial navigation?

(002) The basic operating principle of the very high frequency omnidirectional range system is the phase comparison between the

(002) In instrument landing system operation, a deflection of two dots on the attitude direction indicator glide slope deviation scale indicates the aircraft is

(003) What is used to guide the aircraft during an instrument approach to the active runway?

(004) The tactical air navigation (TACAN) bearing, selected course, and range are displayed on the

(004) The typical tactical air navigation (TACAN) system consists of

(004) The aircrafts compass is designed to align itself with

(005) What type of error is caused by misalignment of the magnetic azimuth detector during installation?

(006) What are the two types of inertial navigation system integrators?

(006) What component is the heart of the F-16 inertial navigation unit (INU)?

(007) The global positioning system (GPS) data provides all except

(007) in an embedded global positioning system, a Kalman filter is used to model errors in

(008) The operational range of the combined altitude radar altimeter is

(009) on the combined altitude radar altimeter, an intermediate frequency of 495 kHz can represent

(010) What is the term for random or unintentional electron movement?

(011) What process lowers a frequency while retaining the intelligence carried on that frequency?

(011) which component's function is to radiate and collect radio frequency (RF)

(012) What is the frequency range of the ultrahigh frequency (UHF) radio system?

(013) the very high frequency (VHF) communicaton system provides clear-voice, two-way communication with what type of modulation?

(012) what frequency is displayed when the radio set control switch is set to GUARD?

(014) the amount of high-frequency wave refaction is directly proportional to the

(015) with single-sideband modulation, what signal(s) get s discarded?

(015) and antenna coupler is required for high-frequency transmissions to

(016) which is not a major component of the AN/ARC-190 radio system?

(016) how many high-frequency channels can be selected from the AN/ARC-190 radio set control?

(017) in the intercommunications system, which type of communication does not require the use of a push-to-talk switch to activate the microphone (MIC)?

(017) which best describes the intercommunication sysetem audio common ground?

(018) the intercommunication system has power whenever there is aircraft power and the intercommunication

(019) what type of satellites has circular equatorial orbits and appears stationary with respect to a point on earth?

(019) what does a satellite do with the signal it receives before it retransmits it back to earth?

(020) what is the digital teletype data-rate capability of the Single Integrated Operational Plan terminal?

(020) which AN/ASC-19 conponent has the selector switch that transfers control to the satellite terminal?

(021) a true statement concerning satellite channel allocation is that the channels are

(022) the selective identification feature (SIF) is used

(022) what identifies the equipment that transmits the altitude of the airborne identification friend or foe/selective identification features (IFF/SIF)?

Which mode of operation is used for security identity?

(024) the angle of attack of an aircraft wing is the angle

(025) Which axis extends lengthwise through the fuselage from the nose to the tail of an aircraft?

(025) which of these describe yaw?

(026) what do stabilators on an aircraft control?

(026) what aircraft control surfaces control the movement of an aircraft about the vertical axis and produce the motion known as yaw?

(027) what control surface is not part of the F-15 primary flight control system?

(027) what F-16 flight control system (FLCS) components contains a force-sensing unit that contains transducers in both the pitch and roll axes?

(028) what is the main purpose of the air data computer (ADC)?

(028) what does the angle of attack (AOA) transmitter use to produce its output?

(029) what provides the aircrew with a visual pitch and roll heading and command information?

(029) what line replaceable unit (LRU) may develop errors during aerobatic maneuvering?

(030) what unit generates and overlays symbology for the F-15 head up display system?

(031) what unit esablishes communications on the 1553 MUX bus in backup mode for the F-15 up-front controls?

(032) multiplexing is best described as