US Airforce Airfield Systems Quiz

Light guns are used to signal aircraft, vehicles, and personnel on runways and taxiways. These areas are crucial for the safe movement of aircraft and require clear communication between air traffic controllers and pilots. Light guns provide a visual means of communication, allowing controllers to direct traffic and indicate important instructions or warnings. The use of light guns on adjacent roads, gravel pavements, or navigational equipment would not serve the same purpose or be as effective in ensuring safe operations on runways and taxiways.

The three barometer output values are averaged in order to determine station pressure. By taking the average of the three values, it helps to eliminate any potential outliers or errors in individual readings, providing a more accurate representation of the barometric pressure.

The AN/TRN-26 tactical air navigation system is capable of providing radio navigation information for up to 100 aircraft simultaneously. This means that the system can handle and provide navigation data to a maximum of 100 aircraft at the same time.

The tactical air navigation system, AN/TRN-41, is capable of providing azimuth, distance, and identification information for up to 100 aircraft simultaneously.

The primary sensor group in the automated meteorological station, AN/FMQ-19, normally contains a complete set of sensors. This means that all the essential sensors required for measuring and monitoring weather parameters are included in this group. The primary sensor group plays a crucial role in providing accurate and reliable meteorological data, which is vital for weather forecasting and analysis.

The primary means of communication control and the interface between the operator and central equipment in the enhanced terminal voice switch is the touch entry display. This device allows the operator to input commands and control the communication system efficiently. It provides a user-friendly interface for the operator to interact with the central equipment, making it the most suitable option for this role.

The correct answer is the monitor control panel. The monitor control panel is responsible for monitoring the various functional groups in the tactical control tower. It allows operators to monitor and control different systems and equipment in the tower, ensuring smooth operations and effective communication.

Upon the detection of parameter faults, the tactical air navigation system, AN/TRN–26, will shutdown. This means that the system will completely turn off and cease all operations. This is likely done to prevent any further damage or errors caused by the parameter faults. Shutting down the system allows for troubleshooting and repairs to be made before it is restarted.

The enhanced terminal voice switch maintenance position is located in the central equipment racks. This means that the maintenance position is not in the bottom floor of the ATC tower, at the transmit/receive site, or in the ATC tower cab.

The correct answer is "The same as at any operator position." This means that the enhanced terminal voice switch maintenance position has the same capabilities as any other operator position. This implies that it can perform all the functions that an operator position can, including monitoring, system maintenance, and communication with active tower-to-aircraft channels.

The supervisory configuration terminal is the enhanced terminal voice switch assembly that is capable of changing system passwords and displaying system fault location. This terminal is responsible for supervising and controlling the configuration and operation of the system. It has the necessary capabilities to manage passwords and provide fault location information, making it the correct answer to the question.

The correct answer is "All TACAN channels." This means that the tactical air navigation system, AN/TRN-41, can operate on any channel within the TACAN system. It is not limited to specific channels such as only "Y" or "X" channels, or only "X" high band channels. The system is capable of functioning on all available TACAN channels.

The range of wind speeds that can be measured by the automated meteorological station, AN/FMQ-19, wind sensor is 0 - 130 miles per hour (mph).

The AN/GRC-171BV4 Have-Quick-Radio has an electronically tuned preselector that replaces the servo, which is a major improvement compared to the AN/GRC-171 radio. This means that the BV4 model can electronically tune the preselector, allowing for more precise and efficient tuning of frequencies. This improvement eliminates the need for a hydraulic actuated servo, making the radio more reliable and easier to maintain.

The enhanced terminal voice switch achieves redundancy by allowing two radio processor cards to be associated with each frequency. This means that in case one card fails, the other card can still handle the communication on that frequency, ensuring uninterrupted service.

The tactical air navigation system, AN/TRN-26, receiver-transmitter holds the average output power level constant by inserting random squitter transmissions. Squitter transmissions are unmodulated pulses that are randomly inserted into the system's output. These random squitter transmissions help maintain a constant average power level by compensating for any fluctuations or variations in the system's output power.

The correct answer is 962–1213MHz. This is because the tactical air navigation system, AN/TRN–41 antenna operates over the whole range of TACAN frequencies from 962–1213MHz.

Barometers/altimeters, AN/ML-102, are usually located in a place where the temperature is constant. This is because temperature fluctuations can affect the accuracy of these instruments. By keeping them in a place with a constant temperature, the readings obtained from the barometers/altimeters will be more reliable and accurate.

The automated meteorological station, AN/FMQ-19 ceilometer, can detect a maximum of three cloud bases. This means that it is capable of measuring and identifying the height of up to three different cloud layers in the atmosphere.

The radio distribution panel is responsible for interfacing between the demarcation panel and radio processor cards. It is designed to distribute voice and data signals to various radio systems and provides a centralized control and monitoring interface. The other options mentioned, such as the radio conferencer panel, supervisory configuration terminal, and radio subsystem configuration panel, do not specifically mention the role of interfacing between the demarcation panel and radio processor cards. Therefore, the correct answer is the radio distribution panel.

The correct answer is 500 linear hours. This means that each digital audiotape in the digital voice recording system can record up to 500 hours of audio.

The correct answer is North reference burst. In the tactical air navigation system, AN/TRN–41, the North reference burst has the highest transmission priority. This burst is used to provide a reference for determining the aircraft's heading or direction. It is crucial for accurate navigation and is given priority to ensure that the aircraft receives the necessary information for maintaining its course.

In order to obtain an accurate time stamp in a digital voice recording system, the global positioning system receiver needs to acquire signals from three satellites. This is because the receiver uses the signals from multiple satellites to triangulate its position and calculate the precise time. By acquiring signals from at least three satellites, the receiver can accurately determine the time and synchronize it with the digital voice recording system.

The AN/URC-119 radio system provides simplex HF radio communications capabilities in the 1.6 to 29.999 MHz frequency range.

The microphone audio travels from the operator position to the central equipment in digital form. This means that the audio signals are converted into a series of binary digits (0s and 1s) before being transmitted. This allows for more efficient and reliable transmission, as digital signals are less susceptible to interference and can be easily processed and manipulated by the central equipment. Encryption, cipher, and analog forms are not mentioned in the question and therefore are not relevant to the answer.

The precision approach radar in the AN/TPN-19 provides both azimuth and elevation information from 20 nautical miles (nm) to touchdown.

The mobile microwave landing system, AN/TRN-45, provides relative distance information to aircraft using distance measuring equipment/precision transponder equipment. This equipment allows the system to accurately measure the distance between the aircraft and the landing area, ensuring safe and precise navigation during landing.

The uninterruptible power supply for the digital voice recording system is designed to provide power for five minutes. This means that in the event of a power outage, the system will continue to function for a duration of five minutes before it shuts down. This is important for ensuring that any ongoing voice recordings are not lost or interrupted during a power failure. A longer power supply duration would be beneficial in case the power outage lasts longer or if there is a need to safely shut down the system.

The purpose of the blower located in the automated meteorological station, AN/FMQ-19, relative humidity/air temperature sensor is to provide fresh air to the dewpoint indicator probe for accurate measurements. The blower helps to ensure that the air around the probe is constantly refreshed, preventing any stagnant air from affecting the accuracy of the measurements. This is important because accurate measurements of humidity and temperature are crucial in meteorology for forecasting weather conditions.

The DVRS workstation controls the operation of the digital recording unit in the digital voice recording system. It is responsible for managing the recording process, storing the recorded data, and providing access to the recordings. The workstation acts as the central control unit for the DVRS, allowing users to start, stop, and manage recordings, as well as retrieve and playback recorded data. It is an essential component in ensuring the smooth operation of the digital recording system.

The tactical air navigation system, AN/TRN-41, is capable of providing azimuth and identity information to an unlimited number of aircraft simultaneously. This means that there is no maximum limit to the number of aircraft that can receive this information from the system at the same time.

The correct answer is 7.5 and 10 feet above ground level. This is because the question states that the antenna height of the tactical air navigation system, AN/TRN-26, is adjustable between certain ranges. Among the given options, only the range of 7.5 and 10 feet above ground level falls within the specified adjustable range.

The correct answer is "inactive" because the alarms on the digital voice recording system are designed to notify users when channels are not in use or not producing any sound. This is important to ensure that the system is functioning properly and to avoid missing any important recordings.

The correct answer is seven because the question asks about the number of VHF/UHF amplitude modulated portable transceivers in the communications shelter functional group of the AN/MSN-7 tactical control tower.

The given correct answer is 4 hours. This implies that the battery of the tactical air navigation system, AN/TRN–41, is capable of providing power for the full system operation for only 4 hours. This indicates that the battery has a limited capacity and would need to be recharged or replaced after 4 hours of continuous use.

When freezing rain accumulates on the freezing-rain sensor probe in the automated meteorological station, it causes the probe's vibrational frequency to decrease.

Based on technical data, it takes four people to set up the tactical air navigation system, AN/TRN–26, in less than one hour.

The correct answer is 28 VDC. The tactical air navigation system, AN/TRN-26, operates on a voltage of 28 VDC.

The AN/TRN-41 is the correct answer because it is a lightweight, portable, tactical air navigation system specifically designed to provide a combat control team with a navigational aid. The other options do not match this description.

The AN/FMQ-12 equipment could be used to determine ionospheric conditions and assess how they would affect radio propagation, specifically impacting Department of Defense systems. This equipment is designed to measure and analyze various aspects of the ionosphere, such as electron density, electron temperature, and ion composition. By understanding these ionospheric conditions, the Department of Defense can make informed decisions about their radio communication systems and potentially mitigate any adverse effects caused by ionospheric variations on radio propagation.

The external power amplifier in the tactical air navigation system, AN/TRN-41 provides a gain of six dB to double the output of the receiver-transmitter twice. Gain is a measure of amplification, and a gain of six dB means that the output signal will be amplified by a factor of four (2^2). Therefore, to double the output twice, a gain of six dB is required.

The correct answer is three because the question asks about the number of modes of operation for the tactical air navigation system, AN/TRN-41. This implies that the system has different modes in which it can operate, and the correct answer indicates that there are three such modes.

The correct answer is 50±0.1 μs. This means that the overall reply delay for "X" channel interrogations in the tactical air navigation system, AN/TRN–41, is 50 microseconds with a tolerance of ±0.1 microseconds.

Most shelter equipment in the tactical control tower, AN/MSN-7, is powered by +28 VDC voltage during normal operation.

The automated meteorological station, AN/FMQ-19, midfield sensor group would be installed when an airfield location must meet Category II criteria. This suggests that the station is specifically designed to gather meteorological data for airfields that need to meet the requirements of Category II criteria.

The mobile microwave landing system, AN/TRN-45, is capable of performing CAT I or CAT II operations when installed in a split-site configuration. This means that it can support both Category I and Category II precision approach and landing operations, providing pilots with accurate guidance and allowing for safe landings in various weather conditions.

The tactical air navigation system, AN/TRN-26, has time-coded pulses transmitted on any one of the 126 channels spaced 1-MHz apart. This means that the system can transmit pulses on a total of 126 different channels, and each channel is spaced 1-MHz apart from the adjacent channel. This spacing allows for precise and accurate navigation as the system can transmit and receive signals on different frequencies, ensuring minimal interference and maximum coverage.

The supervisor configuration terminal of the enhanced terminal voice switch uses DOS as its operating system.

The digital voice recording system's digital recording unit copies hard drive information to a digital audiotape every 15 minutes. This regular interval ensures that the data on the hard drive is consistently backed up to the audiotape, reducing the risk of data loss in case of any system failure or malfunction. This frequent backup also allows for easy retrieval and access to the recorded information when needed.

The correct answer is 50 mph. This means that on improved roads, the tactical control tower AN/MSN-7 can be driven up to a maximum speed of 50 mph.