A. Should have small absorption cross-section
B. Is generally made of boron, hafnium or cadmium
C. Should have large absorption cross-section
D. Both B. and C.
Related Mcqs:
- Liquid metal (e.g., molten sodium) is preferred as a coolant in case of a/an ______________ reactor?
A. Homogeneous
B. Graphite moderated
C. Fast breeder
D. Enriched uranium (3% U-235) fuelled - Tarapur (INDIA) atomic power station____________________?
A. Has two boiling water reactors of American design
B. Has an installed capacity of 400 MW
C. Is the first power reactor in India, which became critical in 1969
D. All A., B. and C. - Spent fuel from the nuclear thermal reactor contains__________________?
A. Fission products
B. Plutonium
C. Unused fuel
D. All A., B. & C. - Ordinary water is not used as a moderator because, it___________________?
A. Has a low absorption cross-section
B. Has a low scattering cross-section
C. Absorbs neutrons
D. Does not absorb neutrons - Sodium melts (at atmospheric pressure) at a temperature of ____________ °C?
A. 58
B. 98
C. 348
D. 588 - A boiling water reactor is the one, in which the_______________________?
A. Coolant water is allowed to boil in the core of the reactor
B. Coolant water, after being heated in the reactor core, generates steam in a boiler
C. Pressurised water is pumped into the core
D. Fuel and the coolant are thoroughly mixed to form a homogeneous solution - Extraction of uranium from its ore is done using ______________ methods?
A. Electrometallurgical
B. Pyrometallurgical
C. Chemical
D. Physical beneficiation - The 92U238 emits an a-particle. The product is____________________?
A. 90U234
B. 90U238
C. 90U236
D. 92U236 - The half life period of a radioactive element depends on its _______________________?
A. Temperature
B. Pressure
C. Amount
D. None of these - Candu reactor is a ______________ nuclear reactor?
A. Natural uranium fuelled heavy water cooled & moderated
B. Highly enriched uranium (85% U-235) fuelled
C. Homogeneous
D. Fast breeder
