Mixed Quiz Questions

This quiz demonstrates a mix of multiple-choice questions (with ordered lists) and numeric questions (with tolerance values).

Question Answer Detail
What is the primary function of a sonar system? 3
  1. To navigate using stars
  2. To communicate with other vessels
  3. To detect underwater objects using sound waves
  4. To measure water depth only
At what frequency (in kHz) does a typical hull-mounted sonar operate? 5 0.5
Which type of sonar uses reflections to detect objects? 1
  1. Active sonar
  2. Passive sonar
  3. Side-scan sonar
  4. Doppler sonar
What is the speed of sound in seawater (in m/s)? 1500 50
Which component converts electrical signals into sound waves? 2
  1. Receiver
  2. Transducer
  3. Display
  4. Amplifier
What is the typical detection range (in nautical miles) for towed array sonar? 20 5
What causes the thermocline effect in sonar propagation? 2
  1. Changes in salinity
  2. Temperature gradients in water layers
  3. Underwater currents
  4. Seafloor composition