Nuclear Power Engineering
Water is a better coolant than a gas (like CO₂, He, N₂ etc.), because it

Requires comparatively smaller pumps and heat exchanger for a given heat transfer rate
Has a better heat transfer characteristics, and it can be pressurised to attain a high temperature
All of these
Is a better neutron moderator as well

ANSWER DOWNLOAD EXAMIANS APP

Nuclear Power Engineering
A control rod

Should have small absorption cross-section
Both B and C
Should have large absorption cross-section
Is generally made of boron, hafnium or cadmium

ANSWER DOWNLOAD EXAMIANS APP