Pick out the wrong statement.
Pick out the wrong statement.
Which of the following is a moderating material used in nuclear reactor?
Which of the following is a moderating material used in nuclear reactor?
Molten sodium (as a coolant in fast breeder reactor)
Molten sodium (as a coolant in fast breeder reactor)
In a pressurised water reactor (PWR), the
In a pressurised water reactor (PWR), the
Which of the following reactors is operated at high neutron flux and low power level?
Which of the following reactors is operated at high neutron flux and low power level?
Fast breeder reactors do not
Fast breeder reactors do not
Which of the following radiations is the least penetrating?
Which of the following radiations is the least penetrating?
Hydrogen differs from deuterium in __________ properties.
Hydrogen differs from deuterium in __________ properties.
The specific heats of three gaseous coolants namely H₂, He and CO₂ in the increasing order are
The specific heats of three gaseous coolants namely H₂, He and CO₂ in the increasing order are
Out of the following, nucleus of __________ atom contains the largest number of neutrons.
Out of the following, nucleus of __________ atom contains the largest number of neutrons.
Final product of uranium extraction plant at Jadugoda (Bihar) is
Final product of uranium extraction plant at Jadugoda (Bihar) is
Which of the following factors is the most important in the site selection for a nuclear power plant?
Which of the following factors is the most important in the site selection for a nuclear power plant?
The sum of masses of two nuclei produced in nuclear fission compared to the mass of original nucleus is
The sum of masses of two nuclei produced in nuclear fission compared to the mass of original nucleus is
Positron is a/an
Positron is a/an
How many atoms are present in one gm-atom of an element?
How many atoms are present in one gm-atom of an element?
Pick out the wrong statement.
Pick out the wrong statement.
Which of the following is a non-fissile material?
Which of the following is a non-fissile material?
__________ gas is normally not used as a coolant in a nuclear reactor, because of its high neutron capture cross-section.
__________ gas is normally not used as a coolant in a nuclear reactor, because of its high neutron capture cross-section.
Pick out the wrong statement.
Pick out the wrong statement.
Molten sodium is used as a coolant in a fast breeder reactor, because of its
Molten sodium is used as a coolant in a fast breeder reactor, because of its
Isotopes of an element have different
Isotopes of an element have different
Which one is radioactive in nature?
Which one is radioactive in nature?
Which of the following nuclear materials is fissile?
Which of the following nuclear materials is fissile?
Main source of __________ is monazite sand.
Main source of __________ is monazite sand.
A pressurised water reactor (PWR) uses pressurised water as a
A pressurised water reactor (PWR) uses pressurised water as a
Enriched uranium means that, it contains
Enriched uranium means that, it contains
The amount of a radioisotope remaining undecayed after a time equal to four times its half life, will be __________ percent.
The amount of a radioisotope remaining undecayed after a time equal to four times its half life, will be __________ percent.
Research reactors are normally meant for
Research reactors are normally meant for
Which one is the radioactive isotope of hydrogen?
Which one is the radioactive isotope of hydrogen?
Which of the following may not need a moderator?
Which of the following may not need a moderator?
Nuclear reactors are provided with shield to guard against the emission of mainly __________ rays.
Nuclear reactors are provided with shield to guard against the emission of mainly __________ rays.
The main purpose of control rod in a nuclear reactor is to control the
The main purpose of control rod in a nuclear reactor is to control the
The half life period of a radioactive element depends on its
The half life period of a radioactive element depends on its
Pick out the wrong statement.
Pick out the wrong statement.
Uranium ore is currently mined & concentrated at
Uranium ore is currently mined & concentrated at
The electric power generation cost in nuclear power plant is less than that in a coal based thermal power plant, mainly because the
The electric power generation cost in nuclear power plant is less than that in a coal based thermal power plant, mainly because the
First experimental observation of nuclear fission was done by
First experimental observation of nuclear fission was done by
Pick out the correct statement.
Pick out the correct statement.
'Light water' used as a coolant in nuclear reactor is nothing but
'Light water' used as a coolant in nuclear reactor is nothing but
Which of the following undergoes fission reaction easily?
Which of the following undergoes fission reaction easily?
Hydrogen has __________ isotopes.
Hydrogen has __________ isotopes.
Commercial power generation from fusion reactor is not yet possible, because
Commercial power generation from fusion reactor is not yet possible, because
The phenomenon of nuclear fission is opposite to that of
The phenomenon of nuclear fission is opposite to that of
A heterogeneous reactor is the one, in which the moderator and the
A heterogeneous reactor is the one, in which the moderator and the
H₂ is a better coolant than CO₂, due to its relatively
H₂ is a better coolant than CO₂, due to its relatively
Heavy water has maximum density at __________ °C.
Heavy water has maximum density at __________ °C.
Neutrons have mass approximately equal to that of __________ atoms.
Neutrons have mass approximately equal to that of __________ atoms.
Which one is different for the neutral atoms of the isotopes of an element?
Which one is different for the neutral atoms of the isotopes of an element?
Nucleus of tritium has __________ neutrons.
Nucleus of tritium has __________ neutrons.
75% of a radioactive element decays in 6 hours. Its half life period is __________ hours.
75% of a radioactive element decays in 6 hours. Its half life period is __________ hours.
Emission of β-particles during radioactive decay of a substance is from
Emission of β-particles during radioactive decay of a substance is from
A nuclear reactor can't be used for
A nuclear reactor can't be used for
The most commonly used nuclear fuel in boiling water reactor is
The most commonly used nuclear fuel in boiling water reactor is
The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron?
The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron?
Pick out the wrong statement.
Pick out the wrong statement.
Artificially produced radioactive isotopes are used for
Artificially produced radioactive isotopes are used for
The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half life period of a radioactive substance is one month, then
The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half life period of a radioactive substance is one month, then
Which of the following is not a naturally occurring nuclear fuel?
Which of the following is not a naturally occurring nuclear fuel?
The half life period of a radiactive element is 100 days. After 400 days, one gm of the element will be reduced to __________ gm.
The half life period of a radiactive element is 100 days. After 400 days, one gm of the element will be reduced to __________ gm.
A moderator __________ the neutrons.
A moderator __________ the neutrons.
Secondary cooling circuit is a must in molten sodium cooled fast breeder reactor for
Secondary cooling circuit is a must in molten sodium cooled fast breeder reactor for
Pressure of CO₂ gas (which is a coolant) in the Calder-Hall nuclear reactor is __________ kgf/cm² .
Pressure of CO₂ gas (which is a coolant) in the Calder-Hall nuclear reactor is __________ kgf/cm² .
A fertile material is the one, which can be
A fertile material is the one, which can be
Pick out the wrong statement.
Pick out the wrong statement.
Indian monazite sand contains __________ percent thorium.
Indian monazite sand contains __________ percent thorium.
Ordinary water is not used as a moderator because, it
Ordinary water is not used as a moderator because, it
Fast breeder reactors are most usable in India, because of our largest __________ deposits.
Fast breeder reactors are most usable in India, because of our largest __________ deposits.
In the gaseous diffusion process of uranium enrichment, the natural uranium is converted into gaseous
In the gaseous diffusion process of uranium enrichment, the natural uranium is converted into gaseous
The number of neutrons accompanying the formation of 54Xe139 and 38Sr94 from the absorption of a slow neutron by 92U235 , followed by nuclear fission is
The number of neutrons accompanying the formation of 54Xe139 and 38Sr94 from the absorption of a slow neutron by 92U235 , followed by nuclear fission is
Which of the following may not need a control rod?
Which of the following may not need a control rod?
Liquid metal (e.g, . molten sodium) is preferred as a coolant in case of a/an __________ reactor.
Liquid metal (e.g, . molten sodium) is preferred as a coolant in case of a/an __________ reactor.
Heavy water is used as a moderator in a
Heavy water is used as a moderator in a
Which of the following is not an ore of uranium?
Which of the following is not an ore of uranium?
One 'amu' is equivalent to
One 'amu' is equivalent to
Gas cooling as compared to water cooling of nuclear reactors
Gas cooling as compared to water cooling of nuclear reactors
What is the average life of a radioactive atom having a 'half life period' of T?
What is the average life of a radioactive atom having a 'half life period' of T?
Uranium Corporation of India Limited (UCIL) engaged in the mining & concentration of uranium ore is located at
Uranium Corporation of India Limited (UCIL) engaged in the mining & concentration of uranium ore is located at
Thermal shield is used in high powered nuclear reactors to
Thermal shield is used in high powered nuclear reactors to
Which of the following nuclear reactors is the most efficient thermodynamically while operating between the same temperature and pressure limits of the reactor?
Which of the following nuclear reactors is the most efficient thermodynamically while operating between the same temperature and pressure limits of the reactor?
The decay product of tritium (a beta emitter) is
The decay product of tritium (a beta emitter) is
Net efficiency of ordinary light water cooled nuclear reactor is about __________ percent.
Net efficiency of ordinary light water cooled nuclear reactor is about __________ percent.
The ratio of neutrons to protons of an element having a mass number and atomic number of 80 and 40 respectively is
The ratio of neutrons to protons of an element having a mass number and atomic number of 80 and 40 respectively is
If 4 gm of a radioisotope has a half life period of 10 days, the half life of 2 gm of the same istotope will be __________ days.
If 4 gm of a radioisotope has a half life period of 10 days, the half life of 2 gm of the same istotope will be __________ days.
Which is used as a coolant in nuclear reactor due to its high capture cross-section?
Which is used as a coolant in nuclear reactor due to its high capture cross-section?
Which one is different for the neutral atoms of the isotopes of an element?
Which one is different for the neutral atoms of the isotopes of an element?
Nuclear fuel complex, Hyderabad is engaged in the job of
Nuclear fuel complex, Hyderabad is engaged in the job of
Nuclear power generation capacity in India is
Nuclear power generation capacity in India is
Pick out the wrong statement.
Pick out the wrong statement.
Energy produced in the nuclear fission is of the order of __________ MeV.
Energy produced in the nuclear fission is of the order of __________ MeV.
The atomic mass of an element is fractional, because
The atomic mass of an element is fractional, because
Which of the following is not, a fertile material?
Which of the following is not, a fertile material?
Isotopes of an element have the same
Isotopes of an element have the same
Which of the following is not used as a moderator in nuclear reactor?
Which of the following is not used as a moderator in nuclear reactor?
Pick out the wrong statement.
Pick out the wrong statement.
'Heavy water' is termed as 'heavy' because it is
'Heavy water' is termed as 'heavy' because it is
Percentage of heavy water in ordinary water is around
Percentage of heavy water in ordinary water is around
MeV is the unit of
MeV is the unit of
Radioactive decay of a material involves a __________ order reaction.
Radioactive decay of a material involves a __________ order reaction.
Which of the following types of nuclear reactors is most prone to radioactive hazards?
Which of the following types of nuclear reactors is most prone to radioactive hazards?
