GPS Question & Answers July 7, 2021 By WatElectronics This article lists 100 GPS MCQs for engineering students. All the GPS Questions & Answers given below include a solution and link wherever possible to the relevant topic. This is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up their fundamentals on GPS topic which is core in Electronics & Communication Engineering. In 1970, a navigation system based on satellites was developed by the U.S DoD (Department of Defense) was known as the Global Positioning System. This system is initially developed for the fulfillment of the military needs of the U.S armed forces. Later on, it was made accessible for both civilian and military users. The purpose of GPS is to provide information about time as well as the position of the object and this is a continuous phenomenon. Nowadays unlimited users are accessing this system. It is passive by nature. Obstacles such as mountains and trees block the weak GPS signals so that the accuracy and the performance get affected. GPS can be accessed for free. The advantages of GPS include route planning being smarter, safety from theft avoids unauthorized vehicle use, administrative burden can be reduced, customer service is good, productivity can be increased, etc. The disadvantages of GPS are; Inaccuracy, the distraction of driving, battery or signal failure, issues of privacy, etc. The applications of GPS include; determining location, tracking, navigation, timing, mapping, etc 1). GNSS systems are _______________. GPS GLONASS Galileo All the above Hint 2). During which year the project on GPS was launched? 1970 1971 1972 1973 Hint 3). Who are the members involved in the success of GPS invention? Roger L. Easton Ivan A. Getting Bradford Parkinson All the above Hint 4). A test on General Relativity was proposed by ____________. Roger L. Easton Ivan A. Getting Bradford Parkinson Friedwardt Winterberg Hint 5). Global Positioning System (GPS) is operated by _______? Russian Space Force China Space Force United States Space Force French Air and Space Force Hint 6). A receiver at GPS calculates the self time and position basing on the received data from the different ___________. Satellites Radio waves Atomic clocks None of the above Hint 7). ___________ is present on the satellites of GPS to contribute the accurate time information. Antenna Transponder Atomic clock All the above Hint 8). How many minimum satellites are operational in the constellation of GPS? 24 25 26 27 Hint 9). The degradation in the quality of GPS by the government of the U.S. discontinued by whom? Ivan A. Getting Bradford Parkinson Friedwardt Winterberg Bill Clinton Hint 10). Which country developed GLONASS in contemporary with the GPS? China India Nepal Russia Hint 11). Galileo system for Navigation is operated by ________. China India Europe Russia Hint 12). Compass satellite system of navigation is operated under __________ government. Chinese Indian European Russian Hint 13). The GPS operated by Indians is ____________. Compass GLONASS Galileo NavIC Hint 14). Once the Selective Availability got lifted the accuracy of GPS was for __________ meters. 3 4 5 6 Hint 15). The mathematical principle involved in GPS is _________? Graphical Resection Analytical Resection Trilateration Triangulation Hint 16). The services offered by GPS ________? Positioning, Navigation and Timing Pollution, Navigation and Temperature Position, Navigation and Temperature Position, Network and Timing Hint 17). The satellites placed in the constellation of GPS arranged into _______ orbital are surrounded to Earth? Five Six Seven Eight Hint 18). The term ‘Epoch’ in GPS is a coded sequence of _________. Time of Departure Time of Closure Time of Arrival (TOA) None of the above Hint 19). The two satellites and its extensions connecting line forming the axis of _______. Parabola Hyperboloid Ellipse None of the above Hint 20). Based on ___________ a receiver of GPS indicates how far the satellite located is. Time Difference Time of Arrival Time of Departure Both b & c Hint 21). The satellites meant for GPS orbits in _______________. Low Earth Orbit (LEO) Medium Earth Orbit (MEO) Geosynchronous Orbit (GSO) Geostationary Equatorial Orbit (GEO) Hint 22). How many satellites on the surface of Earth are used so that the location can be produced? Three Four Five Six Hint 23). A device altitude can be measured using __________ satellite. First Second Third Fourth Hint 24). How many satellites are required to measure 2-D position i.e., the longitude and the latitude? One Two Three Four Hint 25). The components partitioned in GPS are known as ______. Segments Frames Partitions Packets Hint GPS Interview Questions & Answers 26). The current GPS consists of ______ major segments. Two Three Four Five Hint 27). The segments present in GPS are __________. Space Ground control User equipment All the above Hint 28). The US Space Forces maintains, develops and operates _______ segments. Space and User Control and User Space and Control Hint 29). The space segment consists of _________ number of satellites. 16 to 32 24 to 32 16 to 24 24 to 48 Hint 30). How many ground antennas are present in the control segment? Three Four Five Six Hint 31). _____________ tracks the satellites as they are passed over. Master Control Stations Monitor stations Ground Antennas None of the above Hint 32). The observations collected by the monitor stations are fed to ________. Master Control Stations Monitor stations Ground Antennas None of the above Hint 33). Global monitoring station is used in _____________. Master Control Stations Monitor stations Ground Antennas None of the above Hint 34). An alternate Master Control station is present in ________. Space segment Control segment User segment Both a & c Hint 35). How many AFSCN’s are present in the ground antennas category? Five Six Seven Eight Hint 36). AFSCN stands for _______. Air Force Satellite Control Network Air Force Satellite Communication for Navigation Air Force Social Communication Network None of the above Hint 37).Telemetry is collected by ________. Master Control Stations Monitor stations Ground Antennas None of the above Hint 38). How many types of observable are present in GPS? One Two Three Four Hint 39). How many methods used by the surveyors in the measurement of GPS? One Two Three Four Hint 40). ______________ method is used in finding the exact coordinates for the surveying points. Static GPS Baseline Real-Time Kinematic Observations Continuously Operating Reference Stations All the above Hint 41). Static GPS Baseline technique makes use of ________ receivers of GPS. One Two Three Four Hint 42). The distance between base station and the second receiver is calculated by using ________ technique. Static GPS Baseline Real-Time Kinematic Observations (RTK) Continuously Operating Reference Stations All the above Hint 43). ___________ technique uses the multiple numbers of points during the period of measurement and used as the surveyed data. Static GPS Baseline Continuously Operating Reference Station Real-Time Kinematic (RTK) Observations None of the above Hint 44). RTK observations technique limited to ____________ (Kms) range. 10 20 30 40 Hint 45). For the smaller areas ________ technique is used in gathering the surveying data quickly. Static GPS Baseline Real-Time Kinematic (RTK) Observations Continuously Operating Reference Stations All the above Hint 46). CORS stands for ______________. Continuously Operating Reference Station Connection-Oriented Reference Station Continuously Operating Reference Switching None of the above Hint 47). ________ technique offers installation of a base station in the location known and that is permanent. Static GPS Baseline Real-Time Kinematic (RTK) Observations Continuously Operating Reference Stations All the above Hint 48). The Engineering projects which require surveying continuously over a longer duration prefer which technique? Static GPS Baseline Real-Time Kinematic (RTK) Observations Continuously Operating Reference Stations All the above Hint 49). The benefits of using GPS in surveying are ___________. Flexibility Mobility Speed All the above Hint 50). In _____________ the constellation of GPS expanded from 24-slots to 27. May 2011 June 2011 July 2011 August 2011 Hint GPS Question & Answers 51). A group formed with four of the satellites is known as __________. Constellation Segment Frame Epoch Hint 52). The orbital period for every satellite is on average about ___________ hours. 12 13 14 24 Hint 53). The codes used in GPS are ________. Coarse Acquisition code Precise code Both a & b None of the above Hint 54). The satellite transmitting signals are modulated with _____________ bit sequences. Pseudo random Code Precise Code Coarse Acquisition Code Y Code Hint 55). The L1 signal modulated by _________ Mbps Pseudorandom sequence. 1.012 1.022 1.021 1.023 Hint 56). The L2 signal modulated by ___________Mbps sequence of pseudorandom. 10.23 10.24 10.25 10.26 Hint 57). Which GPS code is utilized by public? Pseudo random Code Precise Code Coarse Acquisition Code Y Code Hint 58). Which code is preferred in Military applications? Pseudo random Code Precise Code Coarse Acquisition Code Hamming Code Hint 59). The services offered by GPS are _________. Precise Positioning Service (PPS) Standard Positioning Service (SPS) Both a and b None of the above Hint 60). Which receivers keep track of both the GPS codes? Precise Positioning Service (PPS) Standard Positioning Service (SPS) Both a and b None of the above Hint 61). Which receivers track only Coarse Acquisition codes? Precise Positioning Service (PPS) Standard Positioning Service (SPS) Both a and b None of the above Hint 62). Satellites are provided with a unique sequence of binary code known as _________. Pseudo random Code Precise Code Coarse Acquisition Code Gold Code Hint 63). Which antennas are used in the receivers of GPS? Patch Quad helix Both a & b Modular Hint 64). ____________ antennas are known for amplifying the signals before transmitting it to GPS receiver. Active Passive Both a & b None of the above Hint 65). Less power is utilized by GPS because of _______ antennas. Active Passive Both a & b None of the above Hint 66). A message of navigation broadcasted on L1and the L2 frequencies at ___________ bit rate. 50 bits/sec 40 bits/sec 30 bits/sec 10 bits/sec Hint 67). The basic message format consists of ________ bits. 1000 1250 1500 1750 Hint 68). Each frame consists of ______ sub frames. 3 4 5 6 Hint 69). Week number and the timings are encoded in _____ sub frame. First Second Third Fourth Hint 70). What does second & third sub frame consists of? Week number Timings Almanac Ephemeris Hint 71). What information do the fourth and the fifth sub frames hold? Week number Timings Almanac Ephemeris Hint 72). The time taken by the Almanac to update is _________. 24 hrs 36 hrs 48 hrs 72 hrs Hint 73). GPS is accurate within ___________ meters. 4 5 6 7 Hint 74). DOP stands for __________. Dilution of Performance Dedication over Precision Dilution of Precision None of the Above Hint 75). If the satellites used in tracking are evenly spread then the accuracy of position gets _________. Decreased Increased Balanced Unbalanced Hint GPS Quiz Questions 76). If the strength of the signal is high the reception of signal status is __________. Stable Unstable Upgraded Degraded Hint 77). Location caching done in detection of GPS increases ________ of the system. Accuracy Flexibility Speed Capacity Hint 78). _________ is the lock of GPS in which previous info used to calculate the newer position. Hot start Warm start Cold start Semi start Hint 79). Which is the quickest lock of GPS? Semi start Warm start Cold start Hot start Hint 80). Which lock doesn’t keep the satellites viewing information? Semi start Warm start Cold start Hot start Hint 81). The lock in which all the information dumped is______. Semi start Warm start Cold start Hot start Hint 82). Which is the longest lock? Semi start Warm start Cold start Hot start Hint 83). The principle of Doppler shift used in GPS to measure ________. Accuracy Flexibility Speed Capacity Hint 84). What are the sources of errors in GPS? Signal Multi path Orbital errors Shading All the above Hint 85). What is GPS-ICD-200? Only satellites information Only user information Interfacing information of user and satellites None of the above Hint 86). ICD is an acronym for _______. Interface Control Document Inter Communication Dilution Inter Control Document International Classification of Disease Hint 87). ____________ category GPS receivers are used in the vehicles to achieve address to address information of navigation to the drivers. Recreation Grade Map Grade Survey Grade Both a & b Hint 88). _______________ category receivers offer the users accuracy in position. Recreation Grade Map Grade Survey Grade Both a & b Hint 89). __________ type receiver requires ‘Post Processing Software’. Recreation Grade Map Grade Survey Grade Both a & b Hint 90). __________ tells the receiver at what time the satellite should be at what place? Hyperboloid Ellipse Ephemeris DOP Hint 91). The accuracy of DGPS is ____cm. 10 20 30 40 Hint 92). DGPS stands for _________. Differential Global Positioning System Differential Global Positioning Survey Digital Global Partitioning System Differential Global Partitioning System Hint 93). Modified version of GPS used to approach precision in the military applications is known as ____________. GPS CGPS PGPS DGPS Hint 94). In the year 2021 by January 9th how many satellites were operational? 28 29 30 31 Hint 95). In mapmaking the presence of GPS is to verify _________. Towns Roads Boundaries None of the above Hint 96). Which country has the accurate GPS in comparison to all the regional GPS launched? U.S India China Russia Hint 97). The handset with the integration of GPS was launched in _________. 1990s 1980s 1970s 1960s Hint 98). Cell phones with the receivers of GPS will communicate with ______________ GPS satellites. 30 33 24 22 Hint 99). LPS stands for__________. Land Positioning System Local Positioning System Limited Purchasing Scheme None of the Above Hint 100). In LPS to determine the location, signals are collected from __________. Cell towers Towns Roads Boundaries Hint Read More About Wireless Communication Technologies Time is Up! Time's up
