Identify the odd one out among the following nuclear facilities: a) Trombay b) Tarapur c) Kalpakkam d) Narora Answer: a
A radioisotope typically emits: a) Alpha and beta particles simultaneously b) Beta and gamma rays simultaneously c) Gamma and alpha rays simultaneously d) Alpha or beta particles followed by gamma rays Answer: d
Tritium is an isotope of: a) Oxygen b) Hydrogen c) Phosphorus d) Nitrogen Answer: b
Unstable substances show high radioactivity because of: a) Low proton-neutron ratio b) High proton-neutron ratio c) Proton-neutron ratio equals 1 d) None of these Answer: a
Which isotope is commonly used to generate nuclear energy? a) U-239 b) U-235 c) U-238 d) U-236 Answer: b
Which of the following statements about alpha particles is false? a) They have high ionizing power b) They have high penetrating power c) They possess high kinetic energy d) They are helium nuclei with a positive charge Answer: b
Which type of reaction produces the most harmful radiation? a) Fusion b) Fission c) Chemical reaction d) Photochemical reaction Answer: b
Which radioactive element is used in heart pacemakers? a) Uranium b) Deuterium c) Plutonium d) Radium Answer: c
The most commonly used element in nuclear reactors for electricity generation is: a) Radium b) Plutonium c) Uranium d) Deuterium Answer: c
The working principle of an atomic bomb is based on: a) Nuclear fusion b) Nuclear fission c) Induced radioactivity d) Disintegration Answer: b
The high energy released in an atomic explosion is due to: a) Mass-to-energy conversion b) Chemical-to-thermal energy conversion c) Mechanical-to-nuclear energy conversion d) Neutron-to-proton conversion Answer: a
The fissile material used in atomic bombs is: a) U-235 b) U-238 c) U-239 d) Th-232 Answer: a
Nuclear power reactors operate based on: a) Fission b) Fusion c) Thermal heating d) Combination of all three Answer: a
Atomic bombs were dropped on Hiroshima and Nagasaki during: a) World War I b) Asian War I c) Gulf War II d) World War II Answer: d
Which particle is essential for sustaining a chain reaction in uranium fission? a) Electron b) Proton c) Neutron d) Positron Answer: c
What were the names of the atomic bombs dropped on Japan? a) Little Boy & Fat Man b) Little Man & Fat Boy c) Little Girl & Fat Woman d) Little Woman & Fat Girl Answer: a
Who invented the nuclear reactor? a) Enrico Fermi b) Adolf Gaston Eugen Fick c) Sandford Fleming d) Benoit Fourneyron Answer: a
Who is credited with developing the atomic bomb? a) Warner von Braun b) J. Robert Oppenheimer c) Edward Teller d) Samuel Koehen Answer: b
Which two elements are used to absorb neutrons in a nuclear reactor? a) Boron and Cadmium b) Boron and Plutonium c) Cadmium and Uranium d) Uranium and Boron Answer: a
How many countries detonated atomic bombs before India? a) 5 b) 4 c) 6 d) 3 Answer: a
In nuclear reactors, graphite is used as a: a) Fuel b) Lubricant c) Moderator d) Electric insulator Answer: c
The first atomic bomb was dropped on: a) Nagasaki b) Hiroshima c) Tokyo d) Hong Kong Answer: b
