Mechanical Engineering MCQs

Page No. 162

U238 will undergo fission by_________________?


ahigh energy (fast) neutrons alone

✓


blow energy (slow) neutrons alone

✖


ceither fast or slow neutrons

✖


dmedium energy neutrons

✖



Ideally the neutron flux in reactor should be__________________ ?


amaximum in center and zero at side

✖


bmaximum at side and zero in center

✖


cuniform throughout

✓


dzero throughout

✖


View Answer uniform throughout

The nuclear power plant at Tarapur has the following reactor________________?


afast breeder

✖


bpressurised water

✖


cboiling water

✓


dsodium graphite

✖


View Answer boiling water

The number of isotopes of hydrogen are _________________?


a1

✖


b2

✖


cU

✖


d3

✓


View Answer 3

Reflector in nuclear plants is used to________________?


areturn the neutrons back into the core

✓


bshield the radioactivity completely

✖


ccheck polllution

✖


dconserve energy

✖



The commonly used material for shielding is__________________?


alead or concrete

✓


blead and tin

✖


cgraphite or cadmium

✖


dthick galvanised sheets

✖


View Answer lead or concrete

The energy required to be applied to a radioactive nucleus for the emission of a neutron is________________?


a1 MeV

✖


b2.4 MeV

✖


c4.3 MeV

✖


d7.8 MeV

✓


View Answer 7.8 MeV

Ferrite material is____________________?


athe most fissionable material

✖


bthe basic fuel for nuclear paints

✖


cbasic raw material for nuclear plants

✖


dthe material which absorbs neutrons and undergoes spontaneous changes leading to the formation of fissionable material

✓



In fast breeder reactors___________________?


aany type of moderator can be used

✖


bgraphite is used as the moderator

✖


cheavy water is used as the moderator

✖


dmoderator is dispensed with

✓



Which of the following particles is the lightest__________________?


anucleus

✖


belectron

✓


cproton

✖


dmeson

✖


View Answer electron

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