1. The fuel commonly used in a nuclear power plant is
(A) Coal
(B) Uranium
(C) Natural gas
(D) Diesel
2. Nuclear power plants generate electricity by converting
(A) Chemical energy into electrical energy
(B) Heat energy into electrical energy
(C) Kinetic energy into electrical energy
(D) Solar energy into electrical energy
3. The main source of energy in a nuclear reactor is
(A) Combustion of fuel
(B) Nuclear fission
(C) Nuclear fusion
(D) Thermal conduction
4. In nuclear fission, a heavy nucleus splits into
(A) Smaller nuclei, neutrons, and energy
(B) Electrons and protons only
(C) Photons only
(D) Smaller nuclei only
5. The purpose of a moderator in a nuclear reactor is to
(A) Absorb neutrons
(B) Slow down neutrons
(C) Increase neutron speed
(D) Reflect neutrons away
6. Common moderators used in nuclear reactors are
(A) Heavy water and graphite
(B) Light water and coal
(C) Uranium and plutonium
(D) Steam and air
7. The control rods in a nuclear reactor are used to
(A) Slow down neutrons
(B) Absorb neutrons and control the reaction
(C) Cool the reactor
(D) Increase pressure in the reactor
8. The coolant in a nuclear reactor is used to
(A) Slow down neutrons
(B) Transfer heat from the core to the steam generator
(C) Control fission reaction
(D) Increase neutron flux
9. A Pressurized Water Reactor (PWR) differs from a Boiling Water Reactor (BWR) in that
(A) PWR boils water inside the reactor
(B) PWR keeps water under pressure to prevent boiling
(C) BWR uses heavy water as coolant
(D) PWR does not generate electricity
10. The main byproduct of nuclear fission is
(A) Carbon dioxide
(B) Radioactive waste
(C) Ash
(D) Oxygen
11. The nuclear fuel in reactors must be enriched to increase
(A) Uranium-235 concentration
(B) Uranium-238 concentration
(C) Neutron absorption
(D) Heat transfer
12. The thermal efficiency of a nuclear power plant is typically
(A) 15–25%
(B) 30–35%
(C) 50–60%
(D) 70–80%
13. The primary advantage of nuclear power is
(A) Low capital cost
(B) Low operating cost and no greenhouse gas emission
(C) Short construction time
(D) High fuel availability everywhere
14. The main disadvantage of nuclear power is
(A) High fuel cost
(B) Radioactive waste disposal and safety concerns
(C) Inefficient generation
(D) High carbon emissions
15. The reactor core contains
(A) Moderator only
(B) Fuel rods, control rods, and coolant
(C) Turbine and generator
(D) Steam only
16. Nuclear reactors generate heat through
(A) Combustion
(B) Fission of heavy nuclei
(C) Fusion of light nuclei
(D) Chemical reactions
17. Fast Breeder Reactors (FBR) are designed to
(A) Use slow neutrons only
(B) Generate more fissile material than they consume
(C) Produce electricity without a turbine
(D) Operate at very low temperature
18. The function of the containment structure in a nuclear power plant is to
(A) Increase pressure
(B) Contain radiation and prevent leaks
(C) Cool the reactor core
(D) Absorb neutrons
19. The neutron flux in a reactor is
(A) The number of neutrons passing through a unit area per unit time
(B) The energy of neutrons
(C) The temperature of the reactor
(D) The coolant flow rate
20. Heavy water reactors (CANDU type) use
(A) Light water as moderator and coolant
(B) Heavy water as moderator and coolant
(C) Graphite as moderator
(D) Helium as coolant
21. The primary energy in a nuclear power plant is converted into electrical energy via
(A) Steam turbine and generator
(B) Diesel generator
(C) Gas turbine
(D) Solar PV panels
22. The typical operating temperature of the core in a PWR is
(A) 100–150°C
(B) 250–320°C
(C) 500–600°C
(D) 700–800°C
23. The half-life of a radioactive isotope is
(A) Time required for half of its mass to decay
(B) Time required for total decay
(C) Time required for doubling its mass
(D) Time for neutron absorption
24. The control rods are made of materials like
(A) Uranium and plutonium
(B) Boron, cadmium, or hafnium
(C) Steel
(D) Graphite only
25. The spent fuel from a nuclear reactor is
(A) Reused immediately
(B) Radioactive and requires careful disposal
(C) Non-radioactive and can be thrown away
(D) Used in diesel engines
26. The moderator in a fast breeder reactor is
(A) Heavy water
(B) Light water
(C) None
(D) Graphite
27. Nuclear power plants are classified as
(A) Thermal power plants
(B) Steam power plants
(C) Both thermal and steam power plants
(D) Diesel power plants
28. A Boiling Water Reactor (BWR) produces steam
(A) Inside the reactor core
(B) Outside the reactor in a heat exchanger
(C) Using solar energy
(D) Using chemical reactions
29. The function of a heat exchanger in a nuclear power plant is to
(A) Transfer heat from primary to secondary circuit
(B) Condense steam
(C) Increase reactor pressure
(D) Store radioactive waste
30. The main safety system in a nuclear plant includes
(A) Control rods, containment, and emergency cooling
(B) Turbines and generators
(C) Chimneys and flue gases
(D) Solar panels