Q.1

Out of the followingplaces, a nuclear power plant is not located at

  • Talcher (Orissa)
  • Kaiga (Karnataka)
  • Rawatbhata (Rajsthan)
  • Kalpakkam (Tamilnadu)
Q.2

Commercial power generation from fusion reactor is not yet possible, because

  • it is difficult to control fusion reaction.
  • the fuel required (e.g. deuterium and tritium) is scarce.
  • it is difficult to initiate fusion reaction.
  • quantity of fuel required for initiating fusion reaction is prohibitively high.
Q.3

Final product of uranium extraction plant at Jadugoda (Bihar) is

  • uranium
  • uranium oxide
  • uranium carbide
  • magnesium diuranate
Q.4

Tarapur atomic power station

  • has two boiling water reactors of American design.
  • has an installed capacity of 400 MW.
  • is the first power reactor in India, which became critical in 1969.
  • all (a), (b) and (c).
Q.5

The second underground nuclear test was conducted by India at

  • Jaisalmer
  • Pokhran
  • Kalpakkan
  • Narora
Q.6

A nuclear reactor can't be used for

  • the production of radioisotopes.
  • supplying intense fields or beams of neutron for scientific experiments.
  • marine ship propulsion.
  • none of these.
Q.7

The time taken for a radioactive element to reduce toof its original weight is __________ years, if its half life period isyears.

  • 24
  • 18
  • 6
  • 36
Q.8

Which of the following may not need a moderator ?

  • Candu reactor
  • Fast breeder reactor
  • Homogeneous reactor
  • Pressurised water reactor
Q.9

A nuclear reactor can't be used for

  • the production of radioisotopes.
  • supplying intense fields or beams of neutron for scientific experiments.
  • marine ship propulsion.
  • none of these.
Q.10

The mass number of an element is not changed, when it emits __________ radiations.

  • α & β
  • β & γ
  • γ & α
  • α, β, & γ
Q.11

Which one is the radioactive isotope of hydrogen ?

  • Deuterium
  • Ortho-hydrogen
  • Tritium
  • None of these
Q.12

In a nuclear explosion, the energy is released primarily in the form of __________ energy-

  • potential
  • thermal
  • kinetic
  • electrical
Q.13

Which of the following is artificially produced as it does not occur in nature ?

  • Uranium-235
  • Uranium-233
  • Plutonium-239
  • Both (b) and (c)
Q.14

Which of the following is a moderating material used in nuclear reactor ?

  • Graphite.
  • Cadmium.
  • Zircalloy (an alloy of zirconium and aluminium).
  • Stainless steel.
Q.15

The amount of a radioisotope remaining undecayed after a time equal to four times its half life, will be __________ percent.

  • 3.125
  • 6.25
  • 12.50
  • 25
Q.16

Which of the following is not a naturally occurring nuclear fuel ?

  • Uranium-238
  • Thorium-233
  • Plutonium-239
  • None of these
Q.17

An electron has a mass that is approximately __________ that of the proton.

  • 1836 (approximately)
  • 1/1836 (approximately)
  • 1
  • ∞
Q.18

A homogeneous reactor is the one, in which the

  • fissile atoms are evenly distributed throughout the mass of nuclear reactor.
  • same substance (e.g. heavy water) is used as moderator & coolant.
  • the fuel and the moderator is mixed to form a homogeneous material.
  • all (a), (b) and (c).
Q.19

The largest stable nucleus is

  • U-235
  • U-238
  • Pb-206
  • Bi-209
Q.20

Gas cooling as compared to water cooling of nuclear reactors

  • can not attain a high temperature.
  • is more efficient as gas has a higher specific heat.
  • can produce only saturated steam for feeding to power turbine.
  • none of these.
Q.21

The atomic number of an element is equal to the number of __________ present in its atom.

  • neutrons
  • electrons
  • protons
  • either (b) or (c)
Q.22

The emission of an a-particle causes the resultant nucleus to have

  • more atomic weight and less atomic number.
  • less atomic weight and less atomic number.
  • less atomic weight and more atomic number.
  • none of these.
Q.23

Heavy water plant is not located at

  • Talcher
  • Tuticorin
  • Ramagundam
  • Kota
Q.24

Nucleus of 92U235 contains __________ protons.

  • 92
  • 235
  • 143
  • 325
Q.25

A radioactive substance does not emit

  • α-ray
  • proton
  • position
  • β-ray
Q.26

Solar energy results from __________ reaction.

  • fission
  • combustion
  • thermonuclear
  • none of these
Q.27

Which is not a fissile nuclear material ?

  • U-233
  • U-235
  • U-238
  • Pu-239
Q.28

Which of the following radiations is the least penetrating ?

  • α-rays
  • β-rays
  • γ-rays
  • X-rays
Q.29

The specific heats of three gaseous coolants namely H2, He and CO2 in the increasing order are

  • CO2, He, H2
  • CO2, H2, He
  • H2, He, CO2
  • H2, CO2, He
Q.30

In nuclear reactions, __________ number is conserved.

  • mass
  • atomic
  • both (a) & (b)
  • neither (a) nor (b)
0 h : 0 m : 1 s