Nuclear Power Engineering Quiz 3
1 / 50
The main ore of thorium is__________?
2 / 50
The amount of a radioisotope remaining undecayed after a time equal to four times its half life, will be ______ percent?
3 / 50
The mass number of an element is not changed, when it emits ________ radiations?
4 / 50
Research reactors are normally meant for_______?
5 / 50
The molecular weight of heavy water is__________?
6 / 50
The disintegration rate of a radioactive element ________?
7 / 50
The half life period of a radioactive element is 100 days. After 400 days, one gm of the element will be reduced to _______ gm?
8 / 50
The most commonly used nuclear fuel in boiling water reactor is_____?
9 / 50
Radioactivity of an isotope is expressed in________?
10 / 50
The ratio of neutrons to protons of an element having a mass number and atomic number of 80 and 40 respectively is _____?
11 / 50
The function of moderators in nuclear reactor is to __________?
12 / 50
The 92U238 emits an a-particle. The product is______?
13 / 50
Spent fuel from the nuclear thermal reactor contains___________?
14 / 50
The largest stable nucleus is _________?
15 / 50
The half life period of a radioactive element depends on its _________?
16 / 50
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_____?
17 / 50
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 ___________?
18 / 50
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?
19 / 50
Tarapur (INDIA) atomic power station______?
20 / 50
The decay product of tritium (a beta emitter) is__________?
21 / 50
The main ore of uranium is ________?
22 / 50
The electric power generation cost in nuclear power plant is less than that in a coal based thermal power plant, mainly because the_________?
23 / 50
The amount of a radioactive material (having a half life of 100 years) remaining after 400 years will be _______ of its original weight?
24 / 50
Plutonium_________?
25 / 50
Safety rods provided in nuclear reactors to guard against accidents, in case of earthquake are made of_____?
26 / 50
The most abundant isotope of natural uranium is _____?
27 / 50
Radioactive decay of a material involves a ______ order reaction?
28 / 50
The decrease in the atomic number is not observed in case of_________?
29 / 50
Pressure in a Pressurised Water Reactor (PWR) is used for ______?
30 / 50
The radioisotope used to study the thyroid gland is___________?
31 / 50
The emission of an a-particle causes the resultant nucleus to have______?
32 / 50
Radioactive decay is a ______ change?
33 / 50
Pressure of CO2 gas (which is a coolant) in the Calder-Hall nuclear reactor is _______ kgf/cm2?
34 / 50
The half life period of a radioactive element depends upon the_____?
35 / 50
The new nucleus formed after ?-decay of a radioactive element has_____?
36 / 50
The ratio of atomic radius to its nuclear radius is about_____?
37 / 50
The phenomenon of radioactivity was discovered by_____?
38 / 50
The main purpose of control rod in a nuclear reactor is to control the_____?
39 / 50
The critical mass of a fissionable material can be reduced by___________?
40 / 50
The number of neutrons in the nucleus of Uranium-233 (92U233) is __________?
41 / 50
The mass number of an element is equal to the number of ______ in the nucleus?
42 / 50
The phenomenon of nuclear fission is opposite to that of___________?
43 / 50
The atomic number of a radioactive element is not changed, when it emits ______ rays?
44 / 50
The atomic number of an element is equal to the number of _______ present in its atom?
45 / 50
Solar energy results from ________ reaction?
46 / 50
The atomic weight and atomic number of an element are A and Z respectively. What is the number of neutrons in the atom of that element ?
47 / 50
Primary purpose of a _____ nuclear reactor is to supply a high neutron flux of the order of 1013 to 1014neutrons/cm2 second?
48 / 50
Quantity of fissionable material (i.e. U-235) in natural uranium is ______ percent?
49 / 50
The atomic mass of an element is fractional, because ________?
50 / 50
Sodium melts (at atmospheric pressure) at a temperature of _____ ?C?
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