Introduction to Nuclear Engineering
Module Test 1
Variant 2
Subtest 1. Choose the correct variant of translating the underlined words
1. There are two ways of developing a fission reaction.
a)
b)
c)
2. Uncontrollable chain reaction is used for producing atomic explosions.
a)
b)
c)
3. Neutrons are absorbed by boron or cadmium.
a)
b)
c)
4. The heat is removed from the core to the heat exchanger.
a)
b)
c)
5. Cadmium rods inserted into the pile absorb neutrons readily.
a)
b)
c)
6. For increasing the reactor power the operator increases k.
a)
b)
c)
7. Reactor is necessary for releasing nuclear energy in usable amounts.
a)
b)
c)
8. Measuring of radioactivity is performed by Geiger counters.
a)
b)
c)
9. Neutrons produced in a fission are called a generation.
a)
b)
c)
10. A nuclear reactor is used for maintaining chain reaction.
a)
b)
c)
11. Scientists discovered nuclear energy by splitting uranium nuclei..
a)
b)
c)
12. A reactor is started up by inserting the rods into the core.
a)
b)
c)
13. The fuel is in the form of rods arranged in assemblies.
a)
b)
c)
14. The rods filled with uranium are clad with metal.
a)
b)
c)
15. Neutrons emitted by nuclei induce new fissions.
a)
b)
c)
Subtest 2. Write out the words to complete the text. The first letters are given.
To produce energy we 1) e_______ a fission chain reaction in uranium. When uranium nuclei undergo fission, neutrons are 2) e_________. The ratio of the number of neutrons in one 3) g_________ to the number of neutrons in the 4) p_______ one is called the 5) m__________ factor (k). The reaction is effective if it is not less than 6) u_______. To 7) d_______ the reaction we can either 8) i______ U 235 9) c________ or 10) s_____ ____ neutrons. 11) C_______ reaction is 12) p________ in a nuclear reactor. The heart of the reactor is the 13) c____ where nuclear 14) f_____ is placed. To control the reaction an operator 15) a_____ the 16) v______ of k using cadmium and boron 17) r______. During the reactor operation a lot of 18) h___ is produced. It is absorbed by a 19) c______ which is either gas or 20) l__________ and removed.
Choose the correct variant to complete the sentences
1. To control the fission reaction in a rector k .
a) is varried
b) is increased
c) is maintained at 1
2. The is around the pressure vessel.
|
|
|
a) coolant
b) biological shielding
c) moderator
3. Heat from the core is taken to the .
a) turbine
b) coolant
c) heat exchanger
4. is used to protect the personnel.
a) concrete
b) cadmium
c) boron
5. The experiment with the first reactor was made on the
a) stadium
b) swimmimg pool
c) football ground
6. The first nuclear reactor was set up by. .
a) I. Kurchatov
b) E. Fermi
c) R. Oppenheimer
7. Natural uranium is .
a) U238
b) U235
c) a mixture
8. is used as a moderator.
a) lead
b) graphite
c) concrete
9. If k is greater than 1, the reaction is called .
a) subcritical
b) critical
c) supercritical
10. Uranium is incresing the U235 content in uranium.
a) enrichment
b) reaction
c) explosion
11. Fission chain reaction with a low content of U235 is induced by neutrons.
a) fast
b) slow
c) secondary
12. Secondary neutrons are called neutrons.
a) produced
b) emitted
c) fission
13. The number of fissioning nuclei increases .
a) in stages
b) in an avalanche way
c) successively
14. k depends on .
a) the number of nuclei
b) the number of fissions
c) the type of the reaction
15. The purpose of the first reactor was .
a) to produce energy
b) to prove the theory
c) tto moderate fast neutrons
Answers to Module Test 1 (Variant 2) (Introduction to Nuclear Engineering)
Subtest 1 Subtest 2 Subtest 3
1.b 1.establish 1.a
2.a 2.ejected 2.b
3.a 3.generation 3.c
4.a 4.preceding 4.a
5.b 5.multiplication 5.c
6.a 6.unity 6.b
7.b 7.develop 7.c
8.c 8.increase 8.b
9.b 9.content 9.c
10.c 10.slow down 10.a
11. 11.controllable 11.a
12.c 12.proceeded 12.c
13.b 13.core 13.b
14.a 14.fuel 14.b
15.c 15.adjusts 15.b
16.value
17.rods
18.heat
19.coolant
20.liquid
