169) Enriched uranium is required as a fuel in a nuclear reactor, if light water is used as moderator and coolant, because light water has

high neutron absorption cross-section

low moderating efficiency

high neutron scatter cross-section

low neutron absorption cross-section

Answer is:

low moderating efficiency

increase maximum pressure and maximum temperature

reduce maximum pressure and maximum temperature

increase maximum pressure and decrease maximum temperature

decrease maximum pressure and increase maximum temperature

Answer is:

spark ignition

compression ignition

mixed engine

none of these

Answer is:

cetane number

octane number

calorific value

all of these

Answer is:

opens at 15 Degree after top dead centre and closes at 20 Degree before bottom dead centre

opens at 15 Degree before top dead centre and closes at 20 Degree after top dead centre

opens at top dead centre and closes at bottom dead centre

may open and close anywhere

Answer is: