NextMockSearch exams, e.g. SSC CGL, UPPSC, Lekhpal
Railways PYQCBT 1 2016

RRB NTPC · Question 23

The technology developed to track enemy submarines in World War II was A. RADAR B. SONAR C. Echolocation D. LIDAR

  1. C

  2. B

  3. A

  4. D

Show answer & explanation

Answer: (B) B

Explanation

SONAR (Sound Navigation and Ranging) sends sound pulses through water and listens for their echoes, and it was used extensively in World War II to detect enemy submarines. RADAR uses radio waves and works in air, not underwater.