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WorksheetsPosttest Remedial Q3 Electronics
Total questions: 15
Worksheet time: 8mins
The ability of RADAR to detect wind motions within thunderstorm clouds is due to ____________ technology
Satellite
Microburst
Doppler
Subrefraction
What is the function of a RADAR gun?
measures the speed of the target
measures the height of the target
tracks fast moving targets
controls the target's motion
What can RADARs do, in general?
detect only stationary objects
detect only moving objects
detect stationary and moving objects
detect only incoming objects
Where does modulation happen?
transmitter
receiver
between transmitter and receiver
both transmitter and receiver
What is the advantage of RF amplifier?
Good selectivity
Good signal to noise ratio
Increase sensitivity
Less Crosstalk
At what frequency RF and detection stages are tuned in a TRF radio receiver?
Intermediate Frequency
Radio Frequency
Audio Frequency
Video Frequency
What is the input used at the mixer stage at the superheterodyne receiver?
IF and RF
RF and AF
Intermediate Frequency only
RF and LO frequency
In a superheterodyne receiver, the IF is 455 kHz. If it is tuned to 1200 kHz, the local oscillator frequency will be ____.
1655 kHz
2110 kHz
745 kHz
910 kHz
In a radio receiver, the local oscillator is tuned to a frequency _______
lower than the incoming frequency
higher than the incoming frequency
equal to incoming frequency
equal to intermediate frequency
As compared to tuned radio frequency receivers which of the following is the advantage of using superheterodyne receivers?
High gain and better sensitivity
Better selectivity at high frequencies
Stability
Noise suppression
What describes the selectivity of a radio receiver?
its ability to reject adjacent unwanted signals
its ability to amplify weak signals
the frequency at which it gives maximum amplification to signal
its ability to suppress noise
FM receivers using the standard 88 to 108 MHz band use IF of
8 Mhz
9.9 Mhz
10.7 MHz
12.2 MHz
SNR stands for?
Standard Noise Ratio
Signal-to-Noise Ratio
Standard n-turns Ratio
Standard Noise Transmission Ratio
Which of these tests are used to test FM transmitters?
RF and Audio Quality Tests
THD and SINAD
Audio Signal Power and Balance
Crosstalk and Pilot Supression
In what frequency should the signal generator be tuned in the radio receiver?
Lowest frequency
Medium frequency
Highest frequency
Intermediate frequency
