GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 027
261). The process of fission occurs mainly in
A). nuclear reactors
B). chemical reactions
C). the hydrogen bomb
D). the sun
Answer: nuclear reactors
262). Fission reaction takes place in
A). a nuclear reactor only
B). an atomic bomb only
C). a reactor as well as an atomic bomb
D). the sun
Answer: a reactor as well as an atomic bomb
263). Enriched uranium means uranium that has been enriched in isotope
A). uranium-233
B). uranium-235
C). uranium-238
D). uranium-239
Answer: uranium-235
264). The function of a moderator in a nuclear reactor is
A). to moderate the number of secondary neutrons
B). to slow down the secondary neutrons
C). to increase the number of fissile (or fission- able) nuclei
D). to control the fission reaction
Answer: to slow down the secondary neutrons
265). A breeder reactor is that which
A). produces more fissionable material than it burns
B). does not require fissionable material at all
C). uses only heavy water
D). none of these
Answer: produces more fissionable material than it burns
266). The enormous energy released in an atomic explosion is due to the
A). conversion of mass into energy
B). conversion of chemical energy into heat energy
C). conversion of mechanical energy into nuclear energy
D). conversion of neutrons into protons
Answer: conversion of mass into energy
267). The process by which energy is generated in the sun is the
A). fission of uranium
B). fusion of helium
C). fusion of hydrogen
D). combination of all these processes
Answer: fusion of hydrogen
268). The process responsible for the enormous energy in the sun is
A). nuclear fission
B). nuclear fusion
C). the burning of gases
D). as yet unknown
Answer: nuclear fusion
269). Which of the following are Einstein's discoveries?
A). photoelectric effect and X-rays
B). Radioactivity and the theory of relativity
C). photoelectric effect and the theory of relativity
D). radioactivity and X-rays
Answer: photoelectric effect and the theory of relativity
270). The unit of astronomical distances is the
A). angstrom
B). kilometre
C). nautical mile
D). light year
Answer: light year
A). nuclear reactors
B). chemical reactions
C). the hydrogen bomb
D). the sun
Answer: nuclear reactors
262). Fission reaction takes place in
A). a nuclear reactor only
B). an atomic bomb only
C). a reactor as well as an atomic bomb
D). the sun
Answer: a reactor as well as an atomic bomb
263). Enriched uranium means uranium that has been enriched in isotope
A). uranium-233
B). uranium-235
C). uranium-238
D). uranium-239
Answer: uranium-235
264). The function of a moderator in a nuclear reactor is
A). to moderate the number of secondary neutrons
B). to slow down the secondary neutrons
C). to increase the number of fissile (or fission- able) nuclei
D). to control the fission reaction
Answer: to slow down the secondary neutrons
265). A breeder reactor is that which
A). produces more fissionable material than it burns
B). does not require fissionable material at all
C). uses only heavy water
D). none of these
Answer: produces more fissionable material than it burns
266). The enormous energy released in an atomic explosion is due to the
A). conversion of mass into energy
B). conversion of chemical energy into heat energy
C). conversion of mechanical energy into nuclear energy
D). conversion of neutrons into protons
Answer: conversion of mass into energy
267). The process by which energy is generated in the sun is the
A). fission of uranium
B). fusion of helium
C). fusion of hydrogen
D). combination of all these processes
Answer: fusion of hydrogen
268). The process responsible for the enormous energy in the sun is
A). nuclear fission
B). nuclear fusion
C). the burning of gases
D). as yet unknown
Answer: nuclear fusion
269). Which of the following are Einstein's discoveries?
A). photoelectric effect and X-rays
B). Radioactivity and the theory of relativity
C). photoelectric effect and the theory of relativity
D). radioactivity and X-rays
Answer: photoelectric effect and the theory of relativity
270). The unit of astronomical distances is the
A). angstrom
B). kilometre
C). nautical mile
D). light year
Answer: light year
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