Description : Molten sodium (as a coolant in fast breeder reactor) (A) Can’t attain high temperature at normal pressure (B) Is not at all corrosive, even at a higher temperature (C) Is highly radioactive at elevated temperatures and can cause explosion, when it comes in contact with air or water (D) None of these
Last Answer : (C) Is highly radioactive at elevated temperatures and can cause explosion, when it comes in contact with air or water
Description : Secondary cooling circuit is a must in molten sodium cooled fast breeder reactor for (A) Achieving high degree of superheat in the steam (B) Faster heat removal rate from the core (C) ... circulation pressure (D) Avoiding the mixing of water with radioactive sodium, as it may cause explosion
Last Answer : (D) Avoiding the mixing of water with radioactive sodium, as it may cause explosion
Description : A fast breeder reactor employs (A) Graphite as moderator (B) Water as coolant (C) Molten sodium as coolant as well as moderator (D) U-235 as fuel
Last Answer : (D) U-235 as fuel
Description : Which of the following has the lowest Prandtl number? (A) Molten sodium (a coolant used in fast breeder reactor) (B) Water (C) Transformer oil (D) Dilute H2SO4
Last Answer : (A) Molten sodium (a coolant used in fast breeder reactor)
Description : A fast breeder reactor (A) Utilises fast neutrons for causing fission (B) Converts fertile material (e.g., U-238) into fissile material (Pu-239) (C) Normally employs molten sodium as coolant (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Molten sodium is used as a coolant in a fast breeder reactor, because of its (A) Excellent moderating properties (B) Neutron breeding capability (C) Faster heat removal capability from the core (D) Capability to increase the reaction rate in the core
Last Answer : (C) Faster heat removal capability from the core
Description : Liquid metal (e.g., molten sodium) is preferred as a coolant in case of a/an __________ reactor. (A) Homogeneous (B) Graphite moderated (C) Fast breeder (D) Enriched uranium (3% U-235) fuelled
Last Answer : (C) Fast breeder
Description : Centrifugal pump can't be used to pump (A) Molten sodium (used as a coolant in Fast Breeder Reactor) (B) Moderately viscous vegetable oil used in soap industry (C) Thick molten soap at 80°C (D) None of the above
Last Answer : (C) Thick molten soap at 80°C
Description : Use of molten metal as a coolant in fast breeder reactor helps in (A) Rapid heat transfer from the core (B) Accelerating the reaction rate in the core (C) Breeding neutrons (D) Accelerating the neutrons
Last Answer : (A) Rapid heat transfer from the core
Description : Fast breeder test reactor at Kalpakkam (INDIA) is designed for using (A) Thorium as a fertile material (B) U-238 as a fertile material (C) Helium as a coolant (D) Uranium ore directly as a fuel
Last Answer : (A) Thorium as a fertile material
Description : Fast breeder reactors do not (A) Use Th-232 as fissile fuel (B) Convert fertile material to fissile material (C) Use fast neutrons for fission (D) Use molten sodium as coolant
Last Answer : (A) Use Th-232 as fissile fuel
Description : Which of the following reactors is operated at high neutron flux and low power level? (A) Breeder reactor (B) Research reactor (C) Heterogeneous reactor (D) Liquid metal (e.g., molten sodium) cooled reactor
Last Answer : (B) Research reactor
Description : The type of pump used for the recirculation of molten sodium coolant in liquid metal cooled reactor is a/an __________ pump. (A) Electromagnetic (B) Reciprocating (C) Centrifugal (D) Volute
Last Answer : (A) Electromagnetic
Description : _________ nuclear reactor does not require a heat exchanger tosupply steam to power turbine. (A) Molten sodium cooled (B) Helium cooled (C) Boiling water (D) Pressurised water
Last Answer : (C) Boiling water
Description : Thorium-232 is converted into uranium-233 in a/an __________ nuclear reactor. (A) Thermal (B) Fast breeder (C) Heavy water moderated (D) Enriched uranium
Last Answer : (B) Fast breeder
Description : __________ moderator is used in a fast breeder reactor. (A) Graphite (B) Heavy water (C) Beryllium (D) No
Last Answer : (D) No
Description : Candu reactor is a __________ nuclear reactor. (A) Natural uranium fuelled heavy water cooled & moderated (B) Highly enriched uranium (85% U-235) fuelled (C) Homogeneous (D) Fast breeder
Last Answer : (A) Natural uranium fuelled heavy water cooled & moderated
Description : Heavy water is used as a moderator in a (A) Pressurised water reactor (PWR) (B) Boiling water reactor (BWR) (C) Candu reactor (D) Molten sodium cooled reactor
Last Answer : (C) Candu reactor
Description : A fast reactor uses: w) an extremely short time to get to the maximum operating reactivity. x) uranium-235 as fuel. y) heavy water as a coolant. z) essentially unmoderated neutrons.
Last Answer : ANSWER: Z -- ESSENTIALLY UNMODERATED NEUTRONS.
Description : Pump used for the transportation of molten sodium in a fast breader reactor is a/an __________ pump. (A) Reciprocating (B) Plunger (C) Electromagnetic (D) Gear
Last Answer : (C) Electromagnetic
Description : __________ gas is normally not used as a coolant in a nuclear reactor, because of its high neutron capture cross-section. (A) Nitrogen (B) Hydrogen (C) Helium (D) Carbon dioxide
Last Answer : (A) Nitrogen
Description : Light water' used as a coolant in nuclear reactor is nothing but (A) Ordinary water (B) Mildly acidic (pH = 6) water (C) Mildly alkaline (pH = 8) water (D) None of these
Last Answer : (A) Ordinary water
Description : Heavy water is preferred over ordinary water as a coolant, because it. (A) Acts both as an efficient coolant as well as a moderator (B) Can be heated to a higher temperature without pressurizing (C) Is less prone to radiation damage (D) All (A), (B) and (C)
Description : In a light-water reactor, the coolant is ordinary water. What is the moderator?
Last Answer : ANSWER: WATER or THE SAME WATER
Description : Heavy water (D2O) in a nuclear reactor serves as a (A) Coolant (B) Moderator (C) Both (A) & (B) (D) Neutron absorber
Last Answer : (C) Both (A) & (B)
Description : In a pressurised water reactor (PWR), the (A) Fuel is natural uranium and heavy water acts both as moderator & coolant (B) Coolant water boils in the core of the reactor (C) Coolant water is pressurised to prevent bulk boiling of water in the core (D) Use of moderator is not required
Last Answer : (C) Coolant water is pressurised to prevent bulk boiling of water in the core
Description : A homogeneous reactor is the one, in which the (A) Fissile atoms are evenly distributed throughout the mass of nuclear reactor (B) Same substance (e.g. heavy water) is used as moderator & coolant (C) The fuel and the moderator is mixed to form a homogeneous material (D) All (A), (B) and (C)
Last Answer : (C) The fuel and the moderator is mixed to form a homogeneous material
Description : A heterogeneous reactor is the one, in which the moderator and the (A) Coolant are different materials (B) Coolant are present in different phases (e.g., heavy water and graphite) (C) Fuel are present in different phases (e.g. uranium and heavy water) (D) None of these
Last Answer : (C) Fuel are present in different phases (e.g. uranium and heavy water
Description : Nuclear power reactor located at Tarapur is of __________ type. (A) Fast breeder (B) Pressurised water (C) Boiling water (D) Gas cooled
Description : Which of the following may not need a moderator? (A) Candu reactor (B) Fast breeder reactor (C) Homogeneous reactor (D) Pressurised water reactor
Last Answer : (B) Fast breeder reactor
Description : Fuel for a fast breeder reactor is (A) Plutonium (B) Uranium (C) Radium (D) Neptunium
Last Answer : (A) Plutonium
Description : Fast breeder Test Reactor (FBTR) is located at (A) Kalpakkam (near Madras) (B) Kota (in Rajasthan) (C) BARC (Trombay) (D) Tarapur (in Maharashtra)
Last Answer : (A) Kalpakkam (near Madras)
Description : A thermal nuclear reactor compared to a fast breeder reactor (A) Uses slower neutrons for fission (B) Uses faster neutrons for fission (C) Gives higher power density (D) Requires less fuel to run at the same power level
Last Answer : (A) Uses slower neutrons for fission
Description : A fast breeder reactor (A) Uses natural uranium as fuel (B) Does not require a moderator (C) Both (A) and (B) (D) Neither (A) nor (B)
Last Answer : (B) Does not require a moderator
Description : Thorium can be converted into U-233 in a __________ reactor. (A) Liquid metal cooled (B) Fast breeder (C) Thermal (D) Swimming pool
Description : Fuel for a fast breeder nuclear reactor is (A) Plutonium (B) Uranium (C) Radium (D) Neptunium
Description : In which of the electric power generation system, the operating cost is minimum? (A) Thermal (B) Nuclear (C) Hydroelectric (D) Fast breeder reactor
Last Answer : (C) Hydroelectric
Description : Corona discharge is related to the operation of a/an (A) Induction motor (B) Electrostatic precipitator (C) Fast breeder reactor (D) Magneto hydrodynamic generator (MHD)
Last Answer : Option B
Description : In nuclear reactor, heavy water is used as – (1) coolant (2) fuel (3) moderator (4) atomic smasher
Last Answer : (3) moderator Explanation: Heavy water is used in certain types of nuclear reactors where it acts as a neutron moderator to slow down neutrons so that they are more likely to react with ... do not require uranium enrichment, heavy water reactors are of concern in regards to nuclear proliferation.
Description : Heavy water used as a coolant in nuclear reactor. Heavy Water is:
Last Answer : Water containing heavy Isotopes of Hydrogen atom
Description : In nuclear reactor, heavy water is used as (1) coolant (2) fuel (3) moderator (4) atomic smasher
Last Answer : moderator
Description : Thermal shield is used in high powered nuclear reactors to (A) Protect the walls of the reactor from radiation damage B) Absorb the fast neutrons (C) Slow down the secondary neutrons (D) Protect the fuel element from coming in contact with the coolant
Last Answer : (A) Protect the walls of the reactor from radiation damage
Description : Which of the following is NEVER used as a coolant in nuclear reactors: w) liquid nitrogen x) liquid sodium y) water z) helium gas
Last Answer : ANSWER: W -- LIQUID NITROGEN
Description : Which of the following is not used as a moderator in nuclear reactor? (A) Molten sodium (B) Light water (C) Beryllium (D) Boron hydride
Last Answer : (A) Molten sodium
Description : Which of the following types of nuclear reactors is most prone to radioactive hazards? (A) Pressurised water reactor (B) Gas cooled reactor (C) Molten sodium cooled reactor (D) Boiling water reactor
Last Answer : (D) Boiling water reactor
Description : Which of the following nuclear reactors is the most efficient thermodynamically while operating between the same temperature and pressure limits of the reactor? (A) Molten sodium cooled (B) CO2 gas cooled (C) Pressurised water (D) Boiling water
Last Answer : (D) Boiling water
Description : What is big advantage of fast breeder reactor ?
Last Answer : It has rapid self breeding of fissile fuel during the operation of the reactor, and thus, it offers about sixty times the output with same natural uranium resources through ordinary non-breeder nuclear reactor.
Description : Which reactor has no moderator ? Fast breeder reactor.
Last Answer : Fast breeder reactor.
Description : Fuel used in a Fast Breeder Reactor is -------? A. Uranium Oxide B. Uranium Plutonium carbide C. Uranium Plutonium Oxide (Answer) D. Uranium thorium Oxide E. None of these
Last Answer : C. Uranium Plutonium Oxide (Answer)
Description : Direct conversion of chemical energy into electrical energy is done in a (A) Magnetohydrodynamic (MHD) generator (B) Fuel cell (C) Fast breeder reactor (D) None of these
Last Answer : (B) Fuel cell