Description : Where does the AM broadcast band located in the spectrum band? A. HF band B. VHF band C. LF band D. MF band
Last Answer : D. MF band
Description : In what range of frequencies are most omnidirectional horizontally polarized antennas used? A. VHF, UHF B. VLF, LF C. SH, EHF D. MF, HF
Last Answer : A. VHF, UHF
Description : What frequency band is referred to as the metric waves? A. VHF B. UHF C. HF D. SHF
Last Answer : A. VHF
Description : Which frequency band is a wavelength of 1200m? a. UHF b. LF c. HF d. MF
Last Answer : b. LF
Description : Which band does channel 14 of the television channel belong? A. High VHF band B. EHF band C. UHF band D. Low VHF band
Last Answer : C. UHF band
Description : Channel 7 of the regular television channel belongs to which band? A. Low VHF band B. High VHF band C. Low UHF band D. High UHF band
Last Answer : B. High VHF band
Description : TV channels 2, 4 and 5 are known as ________. A. Mid band UHF B. Low band UHF C. High band VHF D. Low band VHF
Last Answer : D. Low band VHF
Description : Troposheric scatter uses the frequencies in the ________ band. A. VLF B. UHF C. VHF D. UF
Last Answer : B. UHF
Description : Tropospheric scatteris usedwith frequenciesinthe followingrange: a. HF b. VHF c. UHF d. VLF
Last Answer : c. UHF
Description : The frequency band of the ILS glidepath is: a. UHF b. VHF c. SHF d. VLF
Last Answer : a. UHF
Description : In what frequency band is the ATIS normally broadcasted? a. LF b. HF c. ADF d. VHF
Last Answer : d. VHF
Description : What is the channel spacing for MF-HF voice frequencies? A. 2.8 kHz B. 500 Hz C. 3.5 kHz D. 3 kHz
Last Answer : D. 3 kHz
Description : What type of transmission is radiated from an aircraft’s radio altimeter antenna? A. An amplitude modulated continuous wave B. A pulse position modulated UHF signal C. A differential phase shift keyed UHF signal D. A frequency modulated continuous wave
Last Answer : D. A frequency modulated continuous wave
Description : What is the type of emission use by standard AM radio broadcast? A. A0 B. F3 C. A3 D. A5C
Last Answer : C. A3
Description : The frequency tolerance of an AM radio broadcast station A. 200 Hz B. 2000 Hz C. 20 Hz D. 2 Hz
Last Answer : C. 20 Hz
Description : What is required for navigation in IMC? a. Radio equipment and equipment for guidance until visual point b. Anti-icing equipment c. A serviceable weather radar d. One VHF box and one HF box
Last Answer : a. Radio equipment and equipment for guidance until visual point
Description : How far is the visual carrier from the lowest frequency in the spectrum of a monochrome TV broadcast channel following the NTSC standard? A. 1.5 MHz B. 1.25 MHz C. 4.5 MHz D. 0.25 MHz
Last Answer : B. 1.25 MHz
Description : Where is the noise generated that primarily determines the signal-to-noise ratio in a VHF (150MHz) marine-band receiver? A. Man-made noise B. In the atmosphere C. In the receiver front end D. In the ionosphere
Last Answer : C. In the receiver front end
Description : What is the metric subdivision of VHF band? A. Metric B. Millimetric C. Decimetric D. Centimetric
Last Answer : A. Metric
Description : What consists the front-end circuit of a VHF TV superheterodyne receiver? A. Mixer, RF amplifier and AFC? B. RF amplifier, Band pass filter and mixer C. Local oscillator, mixer and RF amplifier D. Local oscillator, AGC and antenna
Last Answer : C. Local oscillator, mixer and RF amplifier
Description : Where is the noise generated that primarily determines the signal-to-noise ratio in a VHF (150 MHz) marine-band receiver? A. In the ionosphere B. In the receiver rear end C. In the receiver front end D. In the atmosphere
Description : Which frequency bands can be refracted during the day by the D layer? A. VLF B. MF C. LF D. Both VLF and LF
Last Answer : D. Both VLF and LF
Description : What connector is popular in attaching test instruments like oscilloscopes, frequency counters, spectrum analyzers, etc? A. UHF connector B. PL-259 C. BNC D. SMA
Last Answer : C. BNC
Description : Assuming a UHF frequency range of 405.0125 MHz to 405.0875 MHz at 25 kHz channeling plan, how many channels can you produce? A. 2.5 ch. B. 2 ch. C. 4 ch. D. 3 ch.
Last Answer : D. 3 ch.
Description : What is the frequency range of an aircraft’s Very High Frequency (VHF) communications? A. 118.000 MHz to 136.975 MHz (worldwide up to 151.975 MHz) B. 108.000 MHz to 117.95 MHz C. 329.15 MHz to 335.00 MHz D. 2.0000 MHz to 29.999 MHz
Last Answer : A. 118.000 MHz to 136.975 MHz (worldwide up to 151.975 MHz)
Description : What do you call the service area of a standard AM broadcast where fading is allowed but not objectionable co-channel interference? A. Experimental B. Secondary C. Tertiary D. Primary
Last Answer : B. Secondary
Description : What is the local oscillator frequency range commercial AM broadcast if it is equal to 455 KHz. A. 540 to 1600 KHz B. 0 to 1600 KHz C. 995 to 2055 KHz D. 0 to 455 KHz
Last Answer : C. 995 to 2055 KHz
Description : Determine from the following radio frequency that falls under the very high frequency band of the radio spectrum. A. 345.00 MHz B. 144.50 MHz C. 235.50 MHz D. 450.00 MHz
Last Answer : C. 235.50 MHz
Description : The extremely high frequency (EHF) band is in the radio spectrum range of _______. A. 30 to 300 kHz B. 30 to 300 GHz C. 3 to 30 MHz D. 3 to 30 GHz
Last Answer : B. 30 to 300 GHz
Description : A radio frequency in the ultra high frequency band of the radio spectrum band. A. 235.50 MHz B. 450.50 MHz C. 150.50 GHz D. 0.31250 GHz
Last Answer : D. 0.31250 GHz
Description : Which of the following fall under the high frequency band of the radio spectrum? A. 8.2345 MHz B. 150.50 MHz C. 2.4555 MHz D. 35.535 MHz
Last Answer : A. 8.2345 MHz
Description : Indicate the false statement. A. HF mixer are generally noisier than HF amplifiers. B. Impulse noise voltage is dependent on bandwidth C. Thermal noise is independent of the frequency at which is measured. D. Industrial noise is usually of the impulse type.
Last Answer : B. Impulse noise voltage is dependent on bandwidth
Description : Highest frequency that can be used for skywave HF communications between two given points on earth. A. Gyro frequency B. Maximum usable frequency C. Critical frequency D. Virtual frequency
Last Answer : B. Maximum usable frequency
Description : What range of frequencies are usually referred to as the Ultra High Frequency (UHF) Band? w) 3 to 30 Mega Hertz x) 30 to 300 Mega Hertz y) 300 to 3,000 Mega Hertz z) 30,000 to 300,000 Mega Hertz
Last Answer : ANSWER: Y -- 300 to 3,000 MEGA HERTZ
Description : This is referred to as a fixed radio station that broadcasts program material from studio to transmitter by radio link. A. Aural BC intercity relay B. Aural broadcast STL C. Shortwave station D. Remote-pickup
Last Answer : B. Aural broadcast STL
Description : How does the electric field strength of a standard broadcast station vary with the distance from the antenna? A. The field strength of a standard broadcast station vary with the distance from ... the distance from the antenna D. The field strength varies inversely as the distance from the antenna
Last Answer : D. The field strength varies inversely as the distance from the antenna
Description : A transmitted signal 5 meters in wavelength is received by an antenna coil having a 50-Ω resistance and a 0.01 H inductance. What is the capacitance of the tuner shunting the antenna coil at this point? A. 0.704 fF B. 0.704 μF C. 0.704 nF D. 0.704 mF
Last Answer : A. 0.704 fF
Description : Which of the following coaxial cable connectors is called the UHF connector? A. PL-259 B. BNC C. N-type connector D. F connector
Last Answer : A. PL-259
Description : When was the UHF channel (14-83) of television were added? A. 1852 B. 1904 C. 1947 D. 1952
Last Answer : D. 1952
Description : What propagation condition is usually indicated when a VHF signal is received from a station over 500 miles away? A. D-layer absorption B. Faraday rotation C. Tropospheric ducting D. Moonbounce
Last Answer : C. Tropospheric ducting
Description : Refers to one of the front end circuit of a VHF TV superheterodyne receiver which is usually a separate circuit coupled to the mixer. A. Antenna feed B. AGC C. RF amplifier D. Local oscillator
Last Answer : D. Local oscillator
Description : What propagation condition is usually indicated when a VHF signal is received from a station over 5000 miles away? A. Moonbounce B. D-layer absorption C. Tropospheric ducting D. Faraday rotation
Description : At what distance is VHF propagation normally limited? A. Around 500 miles B. Around 1500 miles C. Around 2000 miles D. Around 1000 miles
Last Answer : A. Around 500 miles
Description : The maximum power suggested by KBP on 919-1312 AM broadcast station in Metro Manila is A. 10 kW B. 20 kW C. 15 kW D. 5 kW
Last Answer : B. 20 kW
Description : Why does the Navy only use the upper and lower ends of the mf band?
Last Answer : Due to the commercial broadcast (AM) band.
Description : What is the first symbol of a radio signal transmission having an amplitude modulated signal carrier, double side band? A. C B. B C. H D. A
Last Answer : D. A
Description : Which of the following filters block FM radio band for TV channels (2 to 13)? A. High-pass filter B. Band reject filter C. Low-pass filter D. Band-pass filter
Last Answer : B. Band reject filter
Description : One of the following is very useful as a multiband HF receiving antenna. A. Parabolic antenna B. Elementary doublet C. Log-periodic D. Square loop
Last Answer : C. Log-periodic