Radio Receiver Theorem Question & AnswersApril 5, 2022 By WatElectronics This article lists 100 Radio Receiver MCQs for Engineering Students. All the Radio Receiver Questions & Answers given below includes 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 on the fundamentals of the radio receiver.In the year 1986, the first radio receiver was invented by Alexander Stepanovich Popov based on electromagnetic waves. The amplitude modulation and frequency modulation of radio receivers work on the superheterodyne principle. The RF amplifier is optional in AM receivers whereas in FM receivers the RF amplifiers are mandatory. The selectivity, image frequency rejection, fidelity, and sensitivity are the performance parameters of the radio receiver. The amplitude modulation receiver receives the broadcast of music or speech from AM transmitters that operates on short, medium, or long wavebands and the frequency modulation receiver receives a broadcast from frequency modulation transmitters that operates in ultra-high or very high-frequency bands.The AM station will broadcast a signal at a constant frequency but will add a sound wave representing the actual radio to that base signal it's also called a carrier wave. The antenna creates an electrical current that corresponds to the radio signal, and that electrical current is sent to other parts of the radio, that filter out the irrelevant parts of the signal and is sent to speakers, headphones, etc. The function of the radio receiver is to select the desired signals and reject the unwanted signal, amplify the RF signal, and demodulate the selected signal. The radio receiver and radio station transmitter are the two main components of a radio system. The intermediate frequency of amplitude modulation radio receiver is around 470KHz whereas in frequency modulation radio receivers the frequency is around 10.8MHz.1). Which one of the following receivers receives the broadcast of music or speech from amplitude modulation transmitters that operates on short, medium, or long wave bands? Frequency Amplitude Pulse None of the above HintThe transmitter which receives the signal is AM so the receiver which receives the signal is AM receiver2). The insufficient selectivity in tuned radio frequency receiver is due to _______________ ? Oscillatory nature of radio frequency amplifiers Variation in Q Increased bandwidth All of the above HintThe instability, variation in BW over tuning range, and insufficient selectivity are the drawbacks of tuned radio frequency receiver3). The poor adjacent channel rejection results when the intermediate frequency is __________________ ? High Very High Moderate Poor HintThe poor adjacent channel rejection and poor selectivity result when the intermediate frequency is too high4). The image frequency rejection becomes poor when the intermediate frequency is __________________ ? High Very High Moderate Low HintThe selectivity is poor if the intermediate frequency is too high, if IF is low then the result is poor image frequency rejection5). Which one of the following intermediate frequencies makes the selectivity too sharp? High IF Low IF Very low IF None of the above HintIf IF is too high results poor selectivity, if IF is very low results sharp selectivity6). Which one of the following antennae is a wire type of antenna? Dipoles Biconical Reflector Both a and b HintThe reflector antenna is an aperture type of antenna7). The variation in bandwidth over tuning range in tuned radio frequency receiver is due to _______________ ? Oscillatory nature of radio frequency amplifiers Variation in Q Increased bandwidth All of the above HintThe instability, variation in BW over tuning range, and insufficient selectivity are the drawbacks of tuned radio frequency receiver8). Which one of the following is a type of highly directional antenna? Dipole, Collinear Panel, yagi Phased array Parabolic dish HintThe dipole, collinear are ominidirectional antennas and panel, yagi are semidirectional antennas9). The horizontal beamwidth is 30 to 180 degrees in _______________ antenna? Parabolic dish Omnidirectional Patch/panel Both a and b HintThe Patch/panel is one type of semidirectional antenna with 30 to 180 degrees horizontal beamwidth10). The figure shown below is a block diagram of ____________________ receiver? Superheterodyne Tuned radio frequency Simple radio receiver None of the above HintThe Superheterodyne receiver is one type of radio receiver which works on the heterodyne principle11). Which one of the following components converts the audio signals into sound waves? Loudspeakers Detector Tuned circuit AF amplifier HintThe loudspeaker, detector, and tuned circuits are components of radio receivers12). Which one of the following components acts as an oscillator as well as a mixer? Amplifiers Generators Self-excited mixer All of the above HintThe FET, bipolar transistors, integrated circuits, dual-gate MOSFET's, etc are the common type of mixers13). What is the standard form of AGC? Automatic Gain Control Alternate Gain Control Automatic Gain Code None of the above HintThe automatic gain control adjusts the gain of the receivers automatically in radio receivers14). In which one of the following automatic gain control the shifting operating point is towards the cutoff? Reverse Forward Both a and b None of the above HintIn forwarding automatic gain control the shifting operating point is towards the saturation15). The frequency range of amplitude modulation radio receiver is between ________________ ? 100KHz to 1600KHz 5 kHz to 1600KHz 540 kHz to 1600KHz None of the above HintThe input signal in AM radio receivers is AM wave, the AM and FM are two types of radio receiversRadio Receiver MCQs for Exams16). What is the standard form of VLC? Visible Light Communication Variable Light Communication Visible Light Control None of the above HintThe applications of visible light communication include robots in hospitals, vehicle to vehicle communication, etc17). What are the functions of the radio receiver? Amplify’s the RF signal Demodulates the selected signal Selects the desired signals and rejects the unwanted signal All of the above HintThe radio receivers function is to select, amplify, and demodulate the signal18). The horizontal beamwidth is 360 degrees in _______________ antenna? Parabolic dish Omnidirectional Patch/panel Both a and b HintThe omnidirectional is one type of antenna with 360 degrees horizontal beamwidth19). Which one of the following antennae is a linearly polarised type of antenna? Dipoles Biconical Reflector Both a and b HintThe dipoles and biconical antennas are wire type antennas20). The figure shown below is a block diagram of _________________ receiver? Superheterodyne Tuned radio frequency Simple radio receiver None of the above HintThe tuned radio frequency receiver is one type of amplitude modulation radio receiver21). Which one of the following components amplifies the audio signals? Loudspeakers Detector Tuned circuit AF amplifier HintThe loudspeaker, detector, and tuned circuits are components of radio receivers22). Which one of the following components is used to adjust the local oscillator frequency? Amplifiers Antenna Self-excited mixer Automatic gain control HintThe automatic gain control adjusts the gain of the receivers automatically in radio receivers23). Which one of the following receivers receives the broadcast from frequency modulation transmitters that operates in ultra-high or very high-frequency bands? Frequency Amplitude Pulse None of the above HintThe transmitter which receives the signal is FM so the receiver which receives the signal is the FM receiver24). The tuning range of microwave and radar receivers is from 1GHz to ________________ GHz? 10KHz 30GHz 10GHz 160GHz HintThe microwaves can pass through any object that’s why they used in radars25). When the modulation index increases in frequency modulation signal the power remain _________________ ? Increases Decreases Constant None of the above HintThe FM and AM are two types of radio transmissions in radio communication26). Which one of the following components in the FM receiver is used to increase the radio signal power? Antenna Electronic filters Amplifier All of the above HintThe antenna detects the frequency waves and the electronic filters separate the required radio waves27). Which one of the receivers is a double frequency conversion? Superheterodyne Tuned radio frequency Communication All of the above HintThe superheterodyne receiver is the type of receiver with single frequency conversion and there is no frequency conversion in the TRF frequency receiver28). The instability in tuned radio frequency receiver is due to _______________ ? Oscillatory nature of radio frequency amplifiers Variation in Q Increased bandwidth All of the above HintThe instability, variation in BW over tuning range, and insufficient selectivity are the drawbacks of tuned radio frequency receiver29). In which year the first radio receiver was invented? 1986 1970 1999 2001 HintThe first radio receiver is invented based on electromagnetic waves30). The figure shown below is a block diagram of ____________________ receiver? Superheterodyne Tuned radio frequency Simple radio receiver None of the above HintThe aerial, tuned circuit, detectors, AF amplifier, loudspeakers are the components of simple radio receiversRadio Receiver MCQs for Quiz31). Which one of the following components consists of capacitor and inductor coil? Loudspeakers Detector Tuned circuit AF amplifier HintThe loudspeaker, detector, and tuned circuits are components of radio receivers32). In which one of the following automatic gain control the shifting operating point is towards the saturation? Reverse Forward oth a and b None of the above HintIn reverse automatic gain control the shifting operating point is towards the cutoff33). The automatic gain controls are categorized into ____________________ types? One Two Three Four HintThe peak AGC, keyed AGC, and delayed AGC is the types of automatic gain controls34). The frequency range of frequency modulation radio receiver is between _____________ ? 100K Hz to 1600 kHz 88 kHz to 108 MHz 540 kHz to 1600 kHz None of the above HintThe input signal in AM radio receivers is AM wave, the AM and FM are two types of radio receivers35). Which one of the following receivers is used for the reception of short wave telephone signals and telegraph? Communication Amplitude Radar Television HintThe communication receiver, AM, FM, superheterodyne receivers are types of radio receivers36). The process of converting all incoming RF signals to a lower frequency is called ________________? Heterodyne Intermediate frequency Communication None of the above HintThe superheterodyne receiver converts all incoming RF signals to a lower frequency Read more about Radio Frequency (RF)37). Which one of the following parts of the TRF receiver is used to detect the signal? RF section AM detector Audio section All of the above HintThe RF section band limits the received RF signal and amplifies the received RF signal38). Which one of the following parts of the TRF receiver is used to demodulate the amplitude modulation wave? RF section AM detector Audio section All of the above HintThe RF section detects the signal and the audio section amplifies the recovered signal39). The figure shown below is a block diagram of ____________________ receiver? Superheterodyne Tuned radio frequency Communication receiver None of the above HintThe communication receiver is one type of radio receiver which is used for communication purpose40). Which one of the following receivers used to receive television broadcast in ultra-high or very high-frequency bands? Communication Amplitude Radar Television HintThe receiver which receives television signals is known as the television receiverRadio Receiver MCQs for Interviews41). The tuning range of the MW broadcast amplitude modulation receiver is from 540KHz to __________________ ? 1040KHz 1140KHz 1340KHz 1640KHz HintThe MW broadcast is nothing but a medium wave broadcast AM receiver42). In a radio receiver the ________________ oscillator is used as a local oscillator? Hartley Crystal Wein bridge None of the above HintThe hartley oscillator is used as a local oscillator in a radio receiver to change the signal frequency43). Which one of the following receivers is used to receive ranging signals and radio detection? Television Radar FM receivers Communication HintThe purpose of radar receivers is to detect, amplify, and process the echoes from radio transmissions44). Which is the advantage of a tuned radio frequency receiver? High sensitivity Poor audio quality Both a and b None of the above HintThe main disadvantage of a tuned radio frequency receiver is the audio quality is poor45). Which one of the following receivers converts all incoming RF signals to a lower frequency? Television Radar Superheterodyne Communication HintThe process of converting all incoming RF signals to a lower frequency is called IF46). How many batteries do crystal radio receivers require? One Two Three Batteries are not required HintThe crystal radio receiver gets all of its power from the radio waves47). The figure shown below is a block diagram of ____________________ receiver? FM receiver Tuned radio frequency Communication receiver None of the above HintThe frequency modulation receiver is one type of superheterodyne radio receiver48). Which one of the receivers is a Single frequency conversion? Superheterodyne Tuned radio frequency Communication All of the above HintThe communication receiver is double frequency conversion and there is no frequency conversion in the TRF frequency receiver49). Which one of the following components in the FM receiver is used to detect the frequency waves? Antenna Electronic filters Amplifier All of the above HintThe amplifier is used to increase the radio signal power and the electronic filters separate the required radio waves50). The range of radio frequency transmitter and receiver is up to _________________ meters? 150 meters 250 meters 450 meters 100 meters HintThe radio frequency receiver and transmitter used for wireless communications including mobile phones, radio transmission towers Please fill in the comment box below. Time is Up! Time's up
