1. Question 1 of 50

   India's first nuclear test in 1974, code-named 'Smiling Buddha', was held at

   A Chagai B Lop Nur C Nevada D Pokhran
2. Question 2 of 50

   A fast breeder reactor is one that

   A uses no fuel B uses only fusion C has no coolant D produces more fissile material than it consumes
3. Question 3 of 50

   The 2015 JCPOA (Iran nuclear deal) was agreed between Iran and

   A the P5+1 group of countries B only the USA C only Israel D only Russia
4. Question 4 of 50

   The first nuclear weapon test, code-named Trinity, was conducted in 1945 in

   A Nevada, USA B Siberia, USSR C Bikini Atoll D New Mexico, USA
5. Question 5 of 50

   The atomic bomb dropped on Nagasaki on 9 August 1945, 'Fat Man', used

   A plutonium with an implosion design B uranium with a gun design C hydrogen fusion only D deuterium only
6. Question 6 of 50

   The neutron was discovered in 1932 by

   A Ernest Rutherford B James Chadwick C J. J. Thomson D Niels Bohr
7. Question 7 of 50

   SALT I (1972) was an agreement between the USA and USSR to

   A ban all nuclear weapons B share nuclear technology C end the Cold War D limit strategic nuclear arms
8. Question 8 of 50

   The 'nuclear winter' hypothesis suggests that

   A nuclear war would warm the Earth B nuclear weapons produce snow only C smoke from a large nuclear war could cool the Earth and disrupt agriculture D radiation stops all winters
9. Question 9 of 50

   Critical mass is the

   A maximum mass of a reactor B mass of a neutron C minimum mass of fissile material needed to sustain a chain reaction D weight of control rods
10. Question 10 of 50

    The nuclear model of the atom, with a small dense nucleus, was proposed by

    A Ernest Rutherford B J. J. Thomson C Dalton D Bohr
11. Question 11 of 50

    Control rods in a reactor are made of materials such as boron or cadmium to

    A increase neutron speed B produce steam C absorb neutrons and control the reaction rate D shield the building from rain
12. Question 12 of 50

    The Bulletin of the Atomic Scientists is known for maintaining the

    A Nobel Prize list B IAEA inspection list C Periodic Table D Doomsday Clock
13. Question 13 of 50

    Marie and Pierre Curie discovered the radioactive elements

    A polonium and radium B uranium and thorium C plutonium and neptunium D helium and neon
14. Question 14 of 50

    The relation between mass and energy released in nuclear reactions is expressed by

    A E = mc² B F = ma C V = IR D PV = nRT
15. Question 15 of 50

    The 1963 Partial Test Ban Treaty prohibited nuclear tests

    A underground only B in the atmosphere, outer space and underwater C in all places D only in deserts
16. Question 16 of 50

    President Eisenhower's 'Atoms for Peace' speech of 1953 promoted

    A an arms race B the peaceful use of nuclear energy C nuclear tests in space D banning all science
17. Question 17 of 50

    A hydrogen bomb, also called a thermonuclear weapon, mainly depends on

    A chemical explosives only B nuclear fusion triggered by a fission explosion C fission alone D radioactive decay only
18. Question 18 of 50

    The Cuban Missile Crisis, which brought the USA and USSR close to nuclear war, occurred in

    A 1948 B 1962 C 1973 D 1989
19. Question 19 of 50

    START I, signed in 1991 by the USA and USSR, was a treaty on

    A banning nuclear testing B reducing strategic nuclear weapons C space exploration D trade in uranium
20. Question 20 of 50

    The world's first nuclear power plant to supply electricity to a grid (1954) was at

    A Calder Hall in the UK B Shippingport in the USA C Chashma in Pakistan D Obninsk in the USSR
21. Question 21 of 50

    Tsar Bomba, tested by the USSR in 1961, was

    A the first atomic bomb B a nuclear power plant C a treaty D the most powerful nuclear weapon ever detonated
22. Question 22 of 50

    Natural uranium contains about ______ of uranium-235.

    A 7% B 0.7% C 50% D 99%
23. Question 23 of 50

    The Chernobyl nuclear disaster occurred in 1986 in

    A Japan B Ukraine (then in the USSR) C USA D France
24. Question 24 of 50

    'Mutually Assured Destruction' (MAD) is the idea that

    A a nuclear attack would lead to the destruction of both sides, deterring war B one side can win a nuclear war easily C nuclear weapons are useless D only conventional weapons deter war
25. Question 25 of 50

    The main fissile isotope used in nuclear reactors is

    A uranium-238 B carbon-14 C uranium-235 D hydrogen-1
26. Question 26 of 50

    Nuclear fission was discovered experimentally in 1938 by

    A Marie and Pierre Curie B Ernest Rutherford and James Chadwick C Otto Hahn and Fritz Strassmann D Niels Bohr and Max Planck
27. Question 27 of 50

    The Comprehensive Nuclear-Test-Ban Treaty (CTBT) was adopted in

    A 1963 B 1972 C 1996 D 2010
28. Question 28 of 50

    The Treaty on the Non-Proliferation of Nuclear Weapons (NPT) came into force in

    A 1945 B 1970 C 1963 D 1996
29. Question 29 of 50

    Plutonium-239 is produced in reactors from

    A uranium-238 by neutron capture B hydrogen by fusion C thorium by burning D carbon by decay
30. Question 30 of 50

    Calder Hall, opened in 1956, was the world's first

    A atomic bomb test site B research reactor C fusion reactor D commercial-scale nuclear power station
31. Question 31 of 50

    The Three Mile Island accident of 1979 occurred in

    A Ukraine B Japan C Britain D Pennsylvania, USA
32. Question 32 of 50

    The Soviet Union conducted its first atomic bomb test in

    A 1939 B 1957 C 1965 D 1949
33. Question 33 of 50

    The atomic bomb dropped on Hiroshima on 6 August 1945 was nicknamed

    A Fat Man B Trinity C Little Boy D Ivy Mike
34. Question 34 of 50

    The 1967 Outer Space Treaty prohibits

    A launching satellites B placing nuclear weapons in orbit around the Earth C space tourism D radio broadcasts
35. Question 35 of 50

    Nuclear fission is the

    A joining of light nuclei B burning of coal C decay of electrons D splitting of a heavy nucleus into lighter nuclei with release of energy
36. Question 36 of 50

    Nuclear fusion is the

    A joining of light nuclei to form a heavier nucleus with release of energy B splitting of uranium C chemical burning D emission of light only
37. Question 37 of 50

    A moderator in a nuclear reactor is used to

    A absorb all neutrons B cool the turbines C generate electricity directly D slow down neutrons
38. Question 38 of 50

    The International Nuclear Event Scale (INES), used to rate nuclear accidents, ranges from

    A 1 to 5 B 0 to 10 C 0 to 7 D 1 to 100
39. Question 39 of 50

    The 1987 INF Treaty, signed by Reagan and Gorbachev, eliminated

    A intermediate-range nuclear missiles B all nuclear submarines C all nuclear tests D all nuclear power plants
40. Question 40 of 50

    The International Atomic Energy Agency (IAEA) was founded in 1957 and is headquartered in

    A Geneva B Vienna C New York D Paris
41. Question 41 of 50

    Reactor fuel is typically enriched to about

    A 3–5% uranium-235 B 0.1% C 30% D 90%
42. Question 42 of 50

    The Manhattan Project was

    A a Soviet space programme B a nuclear energy treaty C the US-led wartime programme to develop the atomic bomb D a UN health mission
43. Question 43 of 50

    Radioactivity was discovered in 1896 by

    A Albert Einstein B Enrico Fermi C Henri Becquerel D Niels Bohr
44. Question 44 of 50

    The Fukushima Daiichi nuclear accident of 2011 was triggered by

    A a terrorist attack B a plane crash C an earthquake and tsunami D a nuclear test
45. Question 45 of 50

    The Treaty of Tlatelolco (1967) created a nuclear-weapon-free zone in

    A Africa B Central Asia C the Middle East D Latin America and the Caribbean
46. Question 46 of 50

    The first US hydrogen bomb test (Ivy Mike) took place in

    A 1945 B 1952 C 1962 D 1971
47. Question 47 of 50

    The NPT recognises as nuclear-weapon states those that had tested before 1967: the USA, USSR/Russia, UK, France and

    A China B India C Israel D Pakistan
48. Question 48 of 50

    The 1939 Einstein–Szilard letter to President Roosevelt warned about

    A the possibility of German atomic bombs B climate change C space travel D radio waves
49. Question 49 of 50

    The Treaty on the Prohibition of Nuclear Weapons (TPNW) was adopted at the UN in 2017 and entered into force in

    A 1970 B 1996 C 2021 D 2010
50. Question 50 of 50

    The first self-sustaining nuclear chain reaction, in 1942, was achieved by

    A Oppenheimer at Los Alamos B Enrico Fermi at Chicago Pile-1 C Einstein in Princeton D Hahn in Berlin

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