General Knowledge Quiz for Saturday, 19 May 2018
A new general knowledge quiz is available every day. Try today's quiz or work through our archive of daily and themed quizzes.
Question 1: The first formal, patented, human use of sound to echo-locate under water was in relation to detecting what?
A
B
Thermoclines
Submarines in World War I
C
Icebergs
D
Finding schools of fish