RAILWAY ENGINEERING QUIZ

The atomic mass of an element is fractional, because

It contains neutrons

It may have isobars

It may have isotopes

Of uncertainty principle

TRUE ANSWER : ?
YOUR ANSWER : ?

Heavy water used in the nuclear reactors to slow down the speed of neutrons is

Water having dissolved salts of heavy metals

None of these

Highly purified water

A compound of oxygen and deuterium

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YOUR ANSWER : ?

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?

Z

A- Z

A

A+Z

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Which of the following is a fuel for a fusion reactor (thermonuclear reactor)?

Deuterium and tritium

Heavy water

U-233

Thorium

TRUE ANSWER : ?
YOUR ANSWER : ?

Tarapur atomic power station

All of these

Has two boiling water reactors of American design

Is the first power reactor in India, which became critical in 1969

Has an installed capacity of 400 MW

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YOUR ANSWER : ?

The most abundant isotope of natural uranium is

None of these

92U234

92U238

92U235

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A fertile material is the one, which can be

Fissioned by slow (thermal) neutrons

Fissioned by either slow or fast neutrons

Fissioned by fast neutrons

Converted into fissile material on absorption of neutron

TRUE ANSWER : ?
YOUR ANSWER : ?

Quantity of fissionable material (i.e. U-235) in natural uranium is __________ percent.

12.73

6.31

99.29

0.71

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The time required for half of the __________ of a radioactive isotope to decay is called its half life.

Nuclei

Protons

Electrons

Neutrons

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YOUR ANSWER : ?

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

It will completely disintegrate in four months

L/8th of it will remain intact at the end of four months

It will completely disintegrate in two months

3/4th of it will disintegrate in two months

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YOUR ANSWER : ?

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