Results
Q1. In relation to radar systems that use pulse technology, the term ‘Pulse Recurrence Rate (PRR)’ signifies the:
number of pulses per second
Q2. The prime factor in determining the maximum unambiguous range of a primary radar is the:
pulse recurrence rate
Q3. Ignoring pulse length, the maximum pulse repetition frequency (PRF) that can be used by a primary radar facility to detect targets unambiguously to a range of 200 NM is:
405 pps
Q4. Using a primary radar,
All 3 answers are correct
Q5. On a standard radar display (PPI)
The time base is made to rotate synchronously with the antenna in order to display bearing as well as range
Q6. Minimum useful range of a primary radar requires
Short pulses
Q7. A Primary radar operates on the principle of:
pulse technique
Q8. Which one of the following statements is correct concerning the use in primary radar of continuous wave transmissions as compared with pulse transmissions?
It eliminates the minimum target reception range
Q9. In a primary radar system
All radio frequency energy is produced by the radar located at the radar site
Q10. In which frequency band do most airborne weather, and ground based ATC, radar systems operate?
SHF
Q11. In a primary radar the maximum range requires
High pulse effect and long PRI
Q12. The main factor which determines the minimum range that can be measured by a pulsed radar is pulse:
length
Q13. For any given circumstances, in order to double the effective range of a primary radar the power output must be increased by a factor of:
16
Q14. The minimum range of a primary radar, using the pulse technique, is determined by the (i)……..; the maximum unambiguous range by the (ii)………
(i) pulse length (ii) pulse recurrence frequency
Q15. The maximum range of primary radar depends on:
pulse recurrence frequency
Q16. Using primary radar, super refraction may play a role, because
Super refraction may cause the direct wave range to be considerably increased
Q17. The receiver in a primary radar
All 3 answers are correct
Q18. Consider the following statements on a freely suspended magnetic needle in the terrestrial magnetic field:
The needle will align itself with the direction of the magnetic lines of force
Q19. For a parabolic reflector to make a narrow beam
The size must be large compared to the wavelength
