Mechanical Engineering MCQs

Page No. 163

In nuclear fission each neutron that causes fission releases_______________?


ano new neutron


bat least one new neutron


cone new neutron


dmore than one new neutrons



Gas cooled reactor uses following materials as moderator, and coolant____________________?


agraphite, C02


bgraphite, air


cheavy water, C02


dlead, H2


View Answer graphite, C02

A nuclear fission is initiated when the critical energy as compared to neutron binding energy of the atoms is_________________?


asame


bmore


cless


dthere is no such criterion


View Answer more

The mass number of a substance represents the sum of total number of___________________?


aprotons and neutrons in an atom


bprotons and electrons in an atom


cneutrons and electrons in an atom


dprotons and neutrons in a nucleus



The fast breeder reactor uses the following moderator__________________?


ademineralised water


bcarbon dioxide


cheavy water


dno moderator is used


View Answer no moderator is used

The process by which a heavy nucleus is splitted into two light nuclei is known as_________________?


asplitting


bfission


cfusion


ddisintegration


View Answer fission

A nuclear fission produces energy of following order in MeV___________________?


a20


b200


c2000


d20,000


View Answer 200

The breeding gain in case of thermal breeder reactor as compared to fast breeder reactor is________________?


asame


blower


chigher


dunity


View Answer lower

Which of the following is the heaviest________________?


aneutron


bproton


catom


delectron


View Answer atom

Enriched uranium is one in which__________________?


a%age of U235 has been artificially in-creased


b%age of U has been artificially increased


c%age of U234 has been artificially in-creased


dextra energy is pumped from outside



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