Nuclear Power Engineering Education Questions & Answers - Set 13 - ObjectiveBooks

Nuclear Power Engineering Education Questions & Answers - Set 13

Practice Test: Question Set - 13

1. In a homogeneous nuclear reactor, the __________ are mixed together.
    (A) Fuel & coolant
    (B) Fuel & moderator
    (C) Coolant & moderator
    (D) None of these

2. "Critical mass" is the minimum mass of nuclear fissile material required for the
    (A) Sustainment of chain reaction
    (B) Power generation on commercial scale
    (C) Economic power generation
    (D) None of these

3. A fertile material is the one, which can be
    (A) Converted into fissile material on absorption of neutron
    (B) Fissioned by slow (thermal) neutrons
    (C) Fissioned by fast neutrons
    (D) Fissioned by either slow or fast neutrons

4. The atomic number of an element is equal to the number of __________ present in its atom.
    (A) Neutrons
    (B) Electrons
    (C) Protons
    (D) Either (b) or (c)

5. In a pressurized water reactor (PWR), the
    (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 pressurized to prevent bulk boiling of water in the core
    (D) Use of moderator is not required

6. Fast breeder test reactor at Kalpakkam (INDIA) is designed for using
    (A) Thorium as a fertile material
    (B) U-238 as a fertile material
    (C) Helium as a coolant
    (D) Uranium ore directly as a fuel

7. What is the average life of a radioactive atom having a 'half life period' of T?
    (A) 1.44 T
    (B) 0.144 T
    (C) 14.4 T
    (D) 2T

8. Radioactive decay is a __________ change.
    (A) Chemical
    (B) Nuclear
    (C) Physical
    (D) None of these

9. In a nuclear explosion, the energy is released primarily in the form of __________ energy.
    (A) Potential
    (B) Thermal
    (C) Kinetic
    (D) Electrical

10. The sum of masses of two nuclei produced in nuclear fission compared to the mass of original nucleus is
    (A) Less
    (B) More
    (C) Same
    (D) Much more

11. The mass number of an element is equal to the number of __________ in the nucleus.
    (A) Electrons
    (B) Neutrons
    (C) Protons
    (D) Neutrons plus protons (i.e., nucleons)

12. Heavy water (D2O) in a nuclear reactor serves as a
    (A) Coolant
    (B) Moderator
    (C) Both (a) & (b)
    (D) Neutron absorber

13. __________ have the same mass number, but different nuclear charge.
    (A) Isotopes
    (B) Isobars
    (C) Isotones
    (D) None of these

14. 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) Pressurized water is pumped into the core
    (D) Fuel and the coolant are thoroughly mixed to form a homogeneous solution

15. Energy produced in the nuclear fission is of the order of __________ MeV.
    (A) 20
    (B) 200
    (C) 1000
    (D) 2000

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