Q.1
What is used to indicate that a baseline is not usable?
  • a) Blank
  • b) Blink
  • c) Pulse
  • d) Continuous wave
Q.2
Which mode of Loran-C requires a minimum of 3 transmitters with iterative computation to obtain a fix?
  • a) Hyperbolic mode
  • b) Rho-Rho-Rho
  • c) Rho-Rho-Theta
  • d) Rho-Theta-Zulu
Q.3
Which of the following is false about Direct ranging in Loran-C?
  • a) Uses Rho-Rho mode
  • b) Requires minimum 2 stations
  • c) Cost efficient
  • d) High stable user frequency standard
Q.4
Which of the following advantages does the differential Loran-C provide?
  • a) Stable user frequency
  • b) No seasonal errors
  • c) Cost efficient
  • d) Very high range of 500miles
Q.5
Which of the following methods breaks the signal into finite segments to find the ASF?
  • a) Millington’s method
  • b) Bill’s method
  • c) Differential method
  • d) Table look up process
Q.6
What is the number of systems used for redundancy in a transmitting station?
  • a) 2
  • b) 1
  • c) 5
  • d) 3
Q.7
Which of the following derives all the signals needed by the transmitter from the timer?
  • a) PATCO
  • b) ECD
  • c) HCG
  • d) TOPCO
Q.8
In Omega system, a given frequency is transmitted by only one station at any given time.
  • a) True
  • b) False
Q.9
HCGs are the power generators of the Loran-C transmitter stations.
  • a) True
  • b) False
Q.10
What is the use of notch filters in Loran-C receivers?
  • a) Reduce interference from other frequencies
  • b) Reduce interference from other stations
  • c) Reduce interference from sky waves
  • d) Reduce atmospheric noise
Q.11
What type of transmission is used in Omega system?
  • a) Amplitude modulated wave
  • b) Continuous wave
  • c) Phase modulated wave
  • d) Frequency modulated wave
Q.12
Which of the following type is not used in an Omega system?
  • a) Grounded tower
  • b) Insulated tower
  • c) Hanging tower
  • d) Valley span
Q.13
_____ acts as a coarse tuning device for the antenna?
  • a) Loop
  • b) Helix
  • c) Amplifiers
  • d) Filters
Q.14
What type of transmitter is used in a Decca system?
  • a) Frequency synthesizer
  • b) Local oscillator
  • c) Crystal controlled
  • d) Digital
Q.15
What is the approximate range of Chayka system?
  • a) 200mi
  • b) 100mi
  • c) 300mi
  • d) 1000mi
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