Power Plant Engineering Multiple Choice Questions on “Fission Analysis – II”.
1. The half-life of H3 radioisotope is?
a) 12.26 yr
b) 5730 yr
c) 76 min
d) 28.1 yr
Answer: a
Clarification: The Half-life of tritium radioisotope is 12.26 years.
2. Readily fissile isotopes have ___________ half-lives.
a) short
b) long
c) short & long
d) none of the mentioned
Answer: b
Clarification: As the isotopes are fissile, naturally they will have more half-life.
3. The unit superseding Curie as the unit of Radioactivity is?
a) Decibel
b) Hectare
c) Becquerel
d) None of the mentioned
Answer: c
Clarification: Becquerel signifies number of disintegrations per second, much similar to the unit Curie.
4. A series of radioactive fissions is called a _____________
a) Fission Row
b) Fission Chain
c) Fission Column
d) None of the mentioned
Answer: b
Clarification: A series of radioactive fission reactions is called a Fission Chain.
5. Beta decay is usually accompanied by?
a) alpha decay
b) beta decay
c) gamma decay
d) gamma radiation
Answer: d
Clarification: The entire beta decay process involves the release of gamma radiation apart from various factors.
6. The amount of energy in MW-days produced of each metric tonne of fuel is?
a) fuel ignition
b) fuel burnup
c) fuel Chain
d) fuel Column
Answer: b
Clarification: Fuel burnup is the amount of energy in MW-days produced of each metric tonne of fuel.
7. The number of newly born neutrons in an uncontrolled fission reaction is?
a) 2
b) 2.5
c) 2.47
d) 2.38
Answer: c
Clarification: The number of newly born neutrons in an uncontrolled fission reaction is 2.47.
8. The process of losing speed of newly born neutrons on collision with other freshly produced neutrons & other obstacles in the way is called?
a) Dispersion
b) Diversion
c) Deviation
d) Scattering
Answer: d
Clarification: The process of losing speed of newly born neutrons on collision with other freshly produced neutrons & other obstacles in the way is called Scattering.
9. In terms of speed, the newly produced neutrons are classed into how many types?
a) 2
b) 3
c) 4
d) 5
Answer: b
Clarification: In terms of speed, the newly produced neutrons are classed in many types which are Fast, Slow & Intermediate moving neutrons.
10. The velocity of a fast moving neutron is?
a) 2 m/s
b) 2.4 x 1010 m/s
c) 4.4 x 1010 m/s
d) 4.4 x 106 m/s
Answer: d
Clarification: The velocity of the newly produced fast moving neutron is 4.4 x 106 m/s.