Test 27 — Life in the UK Test Practice
About Test 27 (Official 3rd Edition Handbook)
Test 27 is a free 24-question practice test for British citizenship naturalisation and Indefinite Leave to Remain (ILR / settlement) applicants in the United Kingdom. Every question is written directly from the official Home Office handbook, Life in the UK: A Guide for New Residents (3rd Edition), covering British values, UK history, society, and government. To pass the official Life in the UK Test (booking fee £50 at gov.uk), candidates must answer at least 18 out of 24 multiple-choice questions correctly (75% pass mark) within 45 minutes.
Life in the UK Test 27
Who proposed that enemy aircraft could be detected by radio waves and is responsible for the development of the radar?
Correct Answer: Sir Robert Watson-Watt
Sir Robert Watson-Watt (1892–1973) was a Scottish physicist who proposed that enemy aircraft could be detected by radio waves and went on to develop the UK's first practical radar (Radio Detection And Ranging) system in the 1930s.
His invention was crucial to the Battle of Britain in 1940, allowing the RAF to detect incoming German aircraft in time to intercept them.
His work is considered one of the most important technological achievements of the Second World War.