A. Has a low absorption cross-section
B. Has a low scattering cross-section
C. Absorbs neutrons
D. Does not absorb neutrons
Related Mcqs:
- Heavy water is used as a moderator in a _____________________?
A. Pressurised water reactor (PWR)
B. Boiling water reactor (BWR)
C. Candu reactor
D. Molten sodium cooled reactor - Heavy water is preferred over ordinary water as a coolant, because it?
A. Acts both as an efficient coolant as well as a moderator
B. Can be heated to a higher temperature without pressurizing
C. Is less prone to radiation damage
D. All A., B. and C. - Percentage of heavy water in ordinary water is around__________________?
A. 0.015
B. 7.54
C. 0.71
D. 32.97 - Percentage of the heavy water in ordinary water is around ____________________?
A. 0.015
B. 7.54
C. 0.71
D. 32.97 - A heterogeneous reactor is the one, in which the moderator and the________________?
A. Coolant are different materials
B. Coolant are present in different phases (e.g., heavy water and graphite)
C. Fuel are present in different phases (e.g. uranium and heavy water)
D. None of these - Which of the following may not need a moderator ?
A. Candu reactor
B. Fast breeder reactor
C. Homogeneous reactor
D. Pressurised water reactor - ____________ moderator is used in a fast breeder reactor?
A. Graphite
B. Heavy water
C. Beryllium
D. No - A moderator _____________ the neutrons?
A. Slows down
B. Absorbs
C. Accelerates
D. Reflects - Which of the following is not used as a moderator in nuclear reactor ?
A. Molten sodium
B. Light water
C. Beryllium
D. Boron hydride - Net efficiency of ordinary light water cooled nuclear reactor is about _____________ percent?
A. 32
B. 52
C. 72
D. 88
