What effect are the control rods intended to have on the average kinetic energy and number of fission neutrons in a thermal nuclear reactor?
P.3.8.1.7 Induced fission

Quiz
•
Physics
•
11th - 12th Grade
•
Medium
Stanton Wertjes
Used 5+ times
FREE Resource
12 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A
B
C
D
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following substances can be used as a moderator in a nuclear reactor?
Boron
Concrete
Uranium-238
Water
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The moderator of some nuclear reactors is made from graphite.
What is the principal purpose of the graphite?
to absorb all the heat produced
to decrease the speed of neutrons
to absorb α and β radiation
to prevent the reactor from going critical
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
For a nuclear reactor in which the fission rate is constant, which one of the following statements is correct?
There is a critical mass of fuel in the reactor.
For every fission event, there is, on average, one further fission event.
A single neutron is released in every fission event.
No neutrons escape from the reactor.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which line, A to D, in the table gives a combination of materials that is commonly used for moderating, controlling and shielding respectively in a nuclear reactor?
A
B
C
D
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which one of the following statements is not true about the control rods used in a nuclear reactor?
They must absorb neutrons.
They must slow down neutrons to thermal speeds.
They must retain their shape at high temperatures.
The length of rod in the reactor must be variable.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is a moderator required in a thermal nuclear reactor?
to prevent overheating of the nuclear core
to absorb surplus uranium nuclei
to shield the surroundings from gamma radiation
to reduce the kinetic energy of fission neutrons
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