Out of the following, nucleus of _____________ atom contains the largest number of neutrons?
		A. U-235
B. U-238
C. U-239
D. Pu-239
		A. U-235
B. U-238
C. U-239
D. Pu-239
		A. Talcher (Orissa)
B. Kaiga (Karnataka)
C. Rawatbhata (Rajasthan)
D. Kalpakkam (Tamilnadu)
		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.
		A. Fuel is natural uranium and heavy water acts both as moderator & coolant
B. Coolant water boils in the core of the reactor
C. Coolant water is pressurised to prevent bulk boiling of water in the core
D. Use of moderator is not required
		A. Hydrogen
B. Helium
C. Deuterium
D. None of these
		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
		A. Iodine
B. Cobalt
C. Iron
D. Carbon