Power Plant Engineering
Ideally the neutron flux in reactor should be

Zero throughout
Uniform throughout
Maximum at side and zero in canter
Maximum in centre and zero at side

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Power Plant Engineering
In nuclear fission

The electrons of the element change
The molecules rearrange themselves to form other molecules
None of the listed here
The original elements change into completely different elements

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Power Plant Engineering
A nuclear unit becoming critical means

There is danger of nuclear spread
It is generating power to rated capacity
It is capable of generating much more than rated capacity
Chain reaction that causes automatic splitting of the fuel nuclei has been established

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