1. | Which one of the following is essential in the construction of a nuclear reactor? |
A. Cobalt | |
B. Nickel | |
C. Zirconium | |
D. Tungsten |
2. | The alpha particle has two units of positive charge, its mass is approximately equal to |
A. two protons | |
B. an atom of helium | |
C. sum of masses of two positrons and two neutrons | |
D. two positrons as each positron carries a single positive charge |
3. | Cobalt-60 is commonly used in radiation therapy because it emits- |
A. Alpha rays | |
B. Beta rays | |
C. Gamma rays | |
D. X-rays |
4. | Which of the following is used as a Newton controller in a nuclear reactor? |
A. Heavy water | |
B. Graphite | |
C. Cadmium or Boron | |
D. Aluminium |
5. | An atomic pile is used for |
A. Producing X-rays | |
B. Conducting nuclear fission | |
C. Conducting thermonuclear fusion | |
D. accelerating atoms |
6. | Curie is the name of whose unit |
A. Radioactivity | |
B. Temperature | |
C. Heat | |
D. Energy |
7. | Energy is generated in a nuclear reactor |
A. By controlled fusion fusion | |
B. By uncontrolled fusion | |
C. By controlled fission | |
D. By uncontrolled fragmentation |
8. | Why is nuclear fusion also called thermonuclear reaction? |
A. Fusion converts nuclear energy into heat | |
B. Fusion requires extremely high temperature conditions | |
C. Fusion produces a lot of heat | |
D. Fusion reaction takes place in sunlight |
9. | Carbon dating is used to determine the age of fossils. It is estimated by |
A. The planets | |
B. Fossils | |
C. Babies | |
D. Rocks |
10. | Gamma rays are |
A. Electromagnetic waves | |
B. Helium nucleus | |
C. Fast moving electron | |
D. Single ionized gas atom |