In nuclear reactions, ______________ number is conserved?

Related Mcqs:

1. Pressure of CO2 gas (which is a coolant) in the Calder-Hall nuclear reactor is ______________ kgf/cm2?

   A. 0.2
   B. 7
   C. 35
   D. 50

2. An element having large number of ______________ is most easily subjected to nuclear fission?

   A. Protons
   B. Electrons
   C. Neutrons
   D. Nucleons

3. The velocity of thermal (slow) neutrons triggering nuclear fission reaction (having energy equal to 0.025 eV) is about ______________ metres/second?

   A. 1100
   B. 2200
   C. 3300
   D. 4400

4. Thorium-232 is converted into uranium-233 in a/an ______________ nuclear reactor?

   A. Thermal
   B. Fast breeder
   C. Heavy water moderated
   D. Enriched uranium

5. Biological shield is provided in a nuclear power reactor to protect the ______________ from radiation damage?

   A. Fuel elements
   B. Operating personnels
   C. Walls of the reactor

   D. None of these

6. 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

7. Fast breeder nuclear reactors using enriched uranium as fuel may contain upto a maximum of ____________ percent of U-235 (i.e. fissile material)?

   A. 15
   B. 45
   C. 65
   D. 85

8. Net efficiency of ordinary light water cooled nuclear reactor is about _____________ percent?

   A. 32
   B. 52
   C. 72
   D. 88

9. Which of the following is not a naturally occurring nuclear fuel ?

   A. Uranium-238
   B. Thorium-233
   C. Plutonium-239
   D. None of these

10. Which of the following is not used as a nuclear fuel cladding material ?

    A. Zircaloy
    B. Cadmium
    C. Ceramics
    D. Stainless steel