Geology Joint UGC-CSIR (JRF) Examination
Objective Geology Sample Paper
1. Isotopes of
same elements have
(a) Same atomic number but different masses
(b) Same chemical properties but different atomic numbers
(c) Different masses and different atomic numbers
(d) Different chemical properties and same atomic numbers
Answer (b)
2. Mass number of a
substance represents the sum
of total number of
(a) Protons
and neutrons in an atom
(b) Protons
and electrons in an atom
(c) Neutrons
and electrons in an atom
(d) Protons
and neutrons in a nucleus
Answer (d)
3. Moderator in
nuclear plants is used to
(a) Reduce temperature
(b) Extract heat from nuclear reaction
(c) Control the reaction
(a) Cause
collision with the fast moving
neutrons to reduce their speed
Answer (d)
4. Nuclear energy
is measured as
(a) MeV
(b) Curie
(c) Farads
(d) MW
Answer (a)
5. Breeder reactor
has conversion ratio of
(a) Unity
(b) More than unity
(c) Less than unity
(d) Zero
Answer (b)
6. Fast breeder
reactor uses
(a) Boiler
(b) Direct cycle of coolant system
(c) Double circuit system of coolant cycle
(d) Multi pass system
Answer (c)
7. Nuclear reactor
which does not need a heat
exchanger for
generation of steam, is
(a) Gas cooled
(b) Liquid metal cooled
(c) Pressurised water
(d) Boiling water
Answer (d)
8. Number of
isotopes of hydrogen are
(a) 1
(b) 2
(c) 3
(d) 4
Answer (b)
9. Reflector in
nuclear plants is used to
(a) Return the neutrons back into the core
(b) Shield the radioctivity completely
(c) Check pollution
(d) Conserve energy
Answer (a)
10. Ferrite
material is
(a) Most fissionable material
(b) Basic fuel for nuclear plants
(c) Basic raw material for nuclear neutrons
(d) The material which absorbs neutrons and
undergoes spontaneous changes leading to
the formation of fissionable
material
Answer (d)
11. Lightest particle is
(a) Nucleus
(b) Electron
(c) Proton
(d) Meson
Answer (b)
12. In nuclear
fission, each neutron that causes fission releases
(a) No new neutron
(b) Atleast one new neutron
(c) One new neutron
(d) More than one few neutrons
Answer (d)
13. Gas cooled reactor uses which of the
following
materials as moderator
and coolant
(a) Graphite, CO2
(b) Graphite, air
(c) Heavy water, CO2
(d) Lead, H2
Answer (a)
14. A nuclear fission
produces energy of following
order in MeV .
(a) 20 Mev
(b) 200 Mev
(c) 2000 Mev
(d) 20,000 Mev
Answer (b)
15. A nuclear
fission is initiated when the critical
energy as compared
to neutron binding energy
ofthe atoms is
(a) Same
(b) More
(c) Less
(d) None of the above
Answer (b)
16. Process by
which a heavy nucleus is splitted
into two light
nuclei is known as
(a) Splitting
(b) Fission
(c) Fusion
(d) Disintegration
Answer (b)
17. Nuclear power
plant at Tarapur has the reactor
(a) Fast breeder
(b) Pressurised water
(c) Boiling water
(d) Sodium graphite
Answer (c)
18. Ideally the
neutron flux in reactor should be
(a) Maximum in centre and zero at side
(b) Maximum at side and zero in centre
(c) Uniform throughout
(d) Zero throughout
Answer (c)
19. A reactor
capable of converting a ferrite
material into
fissile isotopes is called
(a) Regenerative reactor
(b) Fast breeder reactor
(c) Breeder reactor
(d) Boiling water reactor
Answer (a)
20. The risk of
radioactive hazard is greatest in the
turbine with which
of the following reactor?
(a) Pressurised water
(b) Boiling water
(c) Gas cooled
(d) Liquid metal cooled
Answer (b)
21. Electron-volt
is the unit of
(a) Atomic power
(b) Energy
(c) Voltage
(d) Radio activity
Answer (b)
22. Unit of radio-activity
is
(a) Electron-volt
(b) Electron-ampere
(c) Curie
(d) MeV
Answer (c)
23. Energy
required to be applied to a radioactive
nucleus for the
emission of a neutron is
(a) 1 MeV
(b) 2.4 MeV
(c) 4.3 MeV
(d) 7.8 MeV
Answer (d)
24. Commonly used
material for shielding is
(a) Lead or concrete
(b) Lead and tin
(c) Graphite or candmium
(d) Thick galvanised sheets
Answer (a)
26. Boiling water
reactor employs
(a) Boiler
(b) Direct cycle of coolant system
(c) Double circuit system of coolant cycle
(d) Multi pass system
Answer (b)
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