Radio Receiver Theorem Question & Answers April 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 None Hint 2). 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 None Hint 3). The poor adjacent channel rejection results when the intermediate frequency is __________________ ? High Very High Moderate Poor None Hint 4). The image frequency rejection becomes poor when the intermediate frequency is __________________ ? High Very High Moderate Low None Hint 5). Which one of the following intermediate frequencies makes the selectivity too sharp? High IF Low IF Very low IF None of the above None Hint 6). Which one of the following antennae is a wire type of antenna? Dipoles Biconical Reflector Both a and b None Hint 7). 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 None Hint 8). Which one of the following is a type of highly directional antenna? Dipole, Collinear Panel, yagi Phased array Parabolic dish None Hint 9). The horizontal beamwidth is 30 to 180 degrees in _______________ antenna? Parabolic dish Omnidirectional Patch/panel Both a and b None Hint 10). The figure shown below is a block diagram of ____________________ receiver? Superheterodyne Tuned radio frequency Simple radio receiver None of the above None Hint 11). Which one of the following components converts the audio signals into sound waves? Loudspeakers Detector Tuned circuit AF amplifier None Hint 12). Which one of the following components acts as an oscillator as well as a mixer? Amplifiers Generators Self-excited mixer All of the above None Hint 13). What is the standard form of AGC? Automatic Gain Control Alternate Gain Control Automatic Gain Code None of the above None Hint 14). 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 None Hint 15). 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 None Hint Radio Receiver MCQs for Exams 16). What is the standard form of VLC? Visible Light Communication Variable Light Communication Visible Light Control None of the above None Hint 17). 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 None Hint 18). The horizontal beamwidth is 360 degrees in _______________ antenna? Parabolic dish Omnidirectional Patch/panel Both a and b None Hint 19). Which one of the following antennae is a linearly polarised type of antenna? Dipoles Biconical Reflector Both a and b None Hint 20). The figure shown below is a block diagram of _________________ receiver? Superheterodyne Tuned radio frequency Simple radio receiver None of the above None Hint 21). Which one of the following components amplifies the audio signals? Loudspeakers Detector Tuned circuit AF amplifier None Hint 22). Which one of the following components is used to adjust the local oscillator frequency? Amplifiers Antenna Self-excited mixer Automatic gain control None Hint 23). 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 None Hint 24). The tuning range of microwave and radar receivers is from 1GHz to ________________ GHz? 10KHz 30GHz 10GHz 160GHz None Hint 25). When the modulation index increases in frequency modulation signal the power remain _________________ ? Increases Decreases Constant None of the above None Hint 26). 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 None Hint 27). Which one of the receivers is a double frequency conversion? Superheterodyne Tuned radio frequency Communication All of the above None Hint 28). 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 None Hint 29). In which year the first radio receiver was invented? 1986 1970 1999 2001 None Hint 30). The figure shown below is a block diagram of ____________________ receiver? Superheterodyne Tuned radio frequency Simple radio receiver None of the above None Hint Radio Receiver MCQs for Quiz 31). Which one of the following components consists of capacitor and inductor coil? Loudspeakers Detector Tuned circuit AF amplifier None Hint 32). 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 None Hint 33). The automatic gain controls are categorized into ____________________ types? One Two Three Four None Hint 34). 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 None Hint 35). Which one of the following receivers is used for the reception of short wave telephone signals and telegraph? Communication Amplitude Radar Television None Hint 36). The process of converting all incoming RF signals to a lower frequency is called ________________? Heterodyne Intermediate frequency Communication None of the above None Hint 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 None Hint 38). 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 None Hint 39). The figure shown below is a block diagram of ____________________ receiver? Superheterodyne Tuned radio frequency Communication receiver None of the above None Hint 40). Which one of the following receivers used to receive television broadcast in ultra-high or very high-frequency bands? Communication Amplitude Radar Television None Hint Radio Receiver MCQs for Interviews 41). The tuning range of the MW broadcast amplitude modulation receiver is from 540KHz to __________________ ? 1040KHz 1140KHz 1340KHz 1640KHz None Hint 42). In a radio receiver the ________________ oscillator is used as a local oscillator? Hartley Crystal Wein bridge None of the above None Hint 43). Which one of the following receivers is used to receive ranging signals and radio detection? Television Radar FM receivers Communication None Hint 44). Which is the advantage of a tuned radio frequency receiver? High sensitivity Poor audio quality Both a and b None of the above None Hint 45). Which one of the following receivers converts all incoming RF signals to a lower frequency? Television Radar Superheterodyne Communication None Hint 46). How many batteries do crystal radio receivers require? One Two Three Batteries are not required None Hint 47). The figure shown below is a block diagram of ____________________ receiver? FM receiver Tuned radio frequency Communication receiver None of the above None Hint 48). Which one of the receivers is a Single frequency conversion? Superheterodyne Tuned radio frequency Communication All of the above None Hint 49). 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 None Hint 50). The range of radio frequency transmitter and receiver is up to _________________ meters? 150 meters 250 meters 450 meters 100 meters None Hint Please fill in the comment box below. Time's up
