Nuclear Stuides Quiz

Nuclear Stuies Quiz

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Nuclear Studies

Nuclear Studies Quiz

1 / 25

The new method for determining the age of old wood involve the measurement of :-

C14/C-12 ratio

average life

radioactivity

2 / 25

During fusion of hydrogen into helium :-

Energy is released

Mass is reduced

Mass in increased

3 / 25

If a radioactive substance decays for time equal to its mean life, then its fraction that remains undecayed will be :-

63.2

36.78

4 / 25

Hydrogen bomb is based on the principle of :-

Controlled fusion reaction

Controlled fission reaction

Uncontrolled fussion reaction

5 / 25

Where CFC are used in our daily life:-

Refrigeration

Aerosol spray

all of them

6 / 25

Heavy nuclei must be able to be fissioned by neutrons of a high energy material called ;-

Fission species

Fission fragments

Fission neutrons

7 / 25

During the fission , what is the mass of products:-

More than the original nucleus

Equal to the original nucleus

Both a, b

8 / 25

Water is better coolant than a gas , because it is a better neutron moderator as well:-

True

False

9 / 25

Fission reaction releases large amount of energy ;-

False

True

10 / 25

The resistance of a semiconductor on heating:-

Increase

Decrease

Remain constant

11 / 25

The ultimate product of radioactive disintegration of Uranium is:-

Lead

Radium

Thorium

12 / 25

The most practical fuel for a thermo nuclear reactor , both from economical and nuclear consideration is:-

Deutrium

13 / 25

What is the source of electrical energy in artificial satellite ;-

Solar cells

Dynamo

Thermopile

14 / 25

Half life of an element is 20 min. Then time of decay between its 33% and 67% will be __________ min:-

15 / 25

What is the name of process in which heavy nucleus split into two by bombarding a slow moving neutron is called:-

Nuclear fission

Radioactivity

Nuclear fusion

16 / 25

Transuranic elements have an atomic number;-

Greater than 92

Greater than 82

Greater than 72

17 / 25

Beta rays emitted by a radioactive materials are ;-

Charged particle emitted by nucleus

natural particle

electromagnetic radiation

18 / 25

1 Bq = ___________Curie :-

3.7 x 10 ¹¹

2.7 x 10 ¹¹

2.7 x 10 -¹¹

19 / 25

Pakistan conducted its nuclear test in:-

1999

1998

1996

20 / 25

What is the major problem in nuclear plants :-

Disposal of nuclear waste

Drawing out energy

Fusion of particle

21 / 25

Which of the following is a semiconductor :-

Wood

Germanium

Aluminim

22 / 25

At high temperature ,which materials is the best choice to be used as coolant in a nuclear reactor -

Molten potassium

Heavy water

Water

23 / 25

The function of the moderator in a nuclear reactor is to :-

Stop chain reaction

Absorb neutrons

Reduce the speed of neutron

24 / 25

What is the range of alpha particles in the air :-

Few centimeter

Several thousand meters

Several meters

25 / 25

Find the probability that the nucleus of 87Ra221 undergoes decay after three half lives if its radioactive substance that has a half life of 6 days :

7/8

5/6

1/6

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