to reduce mass of the engine per brake power

to reduce space occupied by the engine

to increase the power output of an engine when greater power is required

all ofthe above

Correct

Incorrect

30 Degree before top dead center

30 Degree after top dead center

30 Degree before bottom dead center

30 Degree after bottom dead center

slow down the speed of fast moving neutrons

control the reaction

reduce the temperature

extract heat from nuclear reaction

heavy water

graphite

carbon dioxide

no moderator is needed