Mechanical Engineering MCQs

Page No. 158

Each fission of U235 produces following number of fast neutrons per fission________________?


a1 neutron

✖


b1 — neutrons

✖


c1 – 2 neutrons

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d2 — neutrons

✓


View Answer 2 — neutrons

A fast breeder reactor__________________?


auses graphite rods as moderator

✖


bhas powerful moderator

✖


chas no moderator

✓


duses ferrite material as moderator

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View Answer has no moderator

A fast breeder reactor uses following as fuel_________________?


aenriched uranium

✖


bplutonium

✖


cthorium

✖


dU235

✓


View Answer U235

Artificial radioactive isotopes find application in________________?


apower generation

✖


bnucleonic devices

✖


cnuclear fission

✖


dmedical field

✓


View Answer medical field

Half life of a radioactive isotope corresponds to the time required for half of the following to decay__________________?


aelectrons

✖


bprotons

✖


cneutrons

✖


datom

✓


View Answer atom

In boiling water reactor, moderator is__________________?


acoolant itself

✓


bferrite rod

✖


cgraphite rod

✖


dliquid sodium metal

✖


View Answer coolant itself

Pressurised water reactor is designed________________?


afor boiling pi water in the core

✖


bto use liquid sodium metal as coolant

✖


cto use intermediate coolant

✖


dto prevent the water coolant from boiling in the core

✓



A fast breeder reactor uses_______________?


a90% U-235

✓


bU-238

✖


cU-235

✖


dPu-239

✖


View Answer 90% U-235

Effective moderators are those materials which contain____________________?


alight weight atoms

✓


bheavy weight atoms

✖


ccritical atoms

✖


dzero weight atoms

✖


View Answer light weight atoms

The coolant used in boiling water reactor is________________?


aCo2

✖


bpressurised water

✖


cmixture of water and steam

✓


dliquid metal

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