MCQOPTIONS
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MCQOPTIONS
This section includes 113 Mcqs, each offering curated multiple-choice questions to sharpen your Avionics knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
Derivatives of phenol are |
| A. | dettol |
| B. | TCP |
| C. | none |
| D. | both a and b |
| Answer» E. | |
| 102. |
The more negative electrons are attracted by more |
| A. | cathode |
| B. | positive pole |
| C. | all of them |
| D. | negative pole |
| Answer» C. all of them | |
| 103. |
An organism is completely dependent on atmospheric O2 for growth. This organism is |
| A. | acidophile |
| B. | osmotolerant |
| C. | obligate aerobe |
| D. | facultative anaerobe |
| Answer» D. facultative anaerobe | |
| 104. |
Sand and rocks further added to cement becomes |
| A. | steel |
| B. | concrete |
| C. | none |
| D. | iron |
| Answer» C. none | |
| 105. |
WHEN_INDIVIDUAL_UP_CONVERTERS_ARE_USED_TO_MODULATE_A_CHANNEL,_WHAT_IS_USED_TO_COMBINE_THEM_INTO_FINAL_SIGNAL??$ |
| A. | Microwave combiner |
| B. | Multiplexer |
| C. | Mixer |
| D. | Amplifier |
| Answer» B. Multiplexer | |
| 106. |
In RF tuning, _________ provides the final up conversion to the microwave frequency? |
| A. | Fixed-frequency local oscillator |
| B. | RF frequency synthesizer |
| C. | Quartz oscillator |
| D. | Magnetic oscillator |
| Answer» C. Quartz oscillator | |
| 107. |
In digital systems, analog signals are first digitized with PCM converters before modulation. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 108. |
Which part of the transmitter subsystem modulates the baseband signal? |
| A. | Antenna |
| B. | Up converter |
| C. | Power amplifiers |
| D. | Mixer |
| Answer» C. Power amplifiers | |
| 109. |
Which of the following amplifiers is used in the transmitter substation? |
| A. | RF amplifiers |
| B. | Buffer amplifiers |
| C. | Klystron amplifier |
| D. | Operational amplifiers |
| Answer» D. Operational amplifiers | |
| 110. |
If the earth station downlink signal received is at fs = 4.08 GHz, what first stage local-oscillator frequency fLO is needed to achieve IF of 770 MHz? |
| A. | 3310 MHz |
| B. | 4080 MHz |
| C. | 1203 MHz |
| D. | 3250 MHz |
| Answer» B. 4080 MHz | |
| 111. |
In Rf tuning, what is the first local oscillator? |
| A. | Quartz oscillator |
| B. | Frequency synthesizer |
| C. | Magnetic oscillator |
| D. | Electric oscillators |
| Answer» C. Magnetic oscillator | |
| 112. |
The satellite in the earth station must be steerable even for a geosynchronous satellite. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 113. |
What is the use of the band pass filter in the receiver section? |
| A. | Protects the receiver |
| B. | Increases antenna gain |
| C. | Reduces noise |
| D. | To reduce it to an intermediate frequency |
| Answer» B. Increases antenna gain | |