NAVSTAR GPS MCQ’s

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This set of Avionics Multiple Choice Questions & Answers (MCQs) focuses on “NAVSTAR GPS”.

1. What is the approximate time taken by the GPS for one complete orbit?
a) 11 minutes
b) 45 minutes
c) 5 hours
d) 12 hours

2. What is the reason for sending two transmissions in the same band?
a) Redundancy
b) Ionosphere refraction corrections
c) Multiplexing
d) Reducing traffic

3. Which of the following is false with respect to GPS?
a) Active system
b) All weather system
c) Continuous system
d) Space based system

4. Which of the following position services provided by the GPS require crypto keys?
a) Precise position service
b) Standard position service
c) Ultimate position service
d) Doppler position service

5. Only L2 signal carries the encrypted precise code.
a) True
b) False

6. What type of antenna is used in GPS systems?
a) Yagi antenna
b) Helical array antenna
c) Loop antenna
d) Parabolic antenna

7. The intentional degradation of GPS signal in specific areas is called ________
a) Selective degradation
b) Selective availability
c) Distributed GPD
d) Signal jamming

8. What is the number of GPS satellites used?
a) 54
b) 12
c) 5
d) 24

9. Which of the following is the latest block of GPS satellites?
a) I
b) IA
c) II
d) IIF

10. What type of modulation is used in L1 Signal of the GPS?
a) Amplitude modulation
b) Phase modulation
c) Frequency shift keying
d) Binary phase shift keying

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