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131.

Which is not a consitituent of atomic pile?

A.	core	B.	Moderator
C.	Control rods	D.	Ionization chamber

132.

Chain reaction is 92U238 will decrease if

A.	its mass exceeds critical mass	B.	its mass is just equal to critical mass
C.	its mass is less than critical mass	D.	all of these answers.

133.

Thermal neutrons are those which

A.	are at very high temperature	B.	move with high velocity
C.	are at rest	D.	have kinetic energies similar to those of surrounding molecules

134.

Fission is a process in which

A.	nucleus is split into two fragments	B.	two nuclei fuse together and fecrease in mass appears in the form of energy
C.	atoms and molecules lose their identity	D.	matter appears in the fourth state called plasma

135.

The process in a nuclear reactor is

A.	controlled nuclear fission	B.	uncontrolled nuclear fission
C.	controlled nuclear fusion	D.	uncontrolled nuclear fusion

136.

The first atomic power plant in India was built at

A.	Narora	B.	Kalapakkam
C.	Tasapur	D.	Kota

137.

India entered the nulear energy club as

A.	fourth nation of the world	B.	fifth nation of the world
C.	sixth nation of the world	D.	seventh nation of the world

138.

India conducted an underground nuclear test at

A.	Pushkar	B.	Kalapakkam
C.	Norora	D.	Pokharan

139.

Nuclear energy is due to conversion of

A.	light into heat	B.	mass into energy
C.	protons into neutrons	D.	helium into hydrogen

140.

Laser is an acronym for light amplification by

A.	stimulated emission of radiation	B.	spontaneous emission of radiation
C.	stimulated energetic radiation	D.	spontaneous emission of radio waves