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  • Question
  • How many atoms are present in one gm-atom of an element?


  • Options
  • A. 2 x 1023
  • B. 6 x 1023
  • C. 6 x 1032
  • D. 5 x 105

  • Correct Answer
  • 6 x 1023 


  • Nuclear Power Engineering problems


    Search Results


    • 1. Which one is different for the neutral atoms of the isotopes of an element?

    • Options
    • A. Atomic weights
    • B. Atomic numbers
    • C. Number of protons
    • D. Number of electrons
    • Discuss
    • 2. Thorium can be converted into U-233 in a __________ reactor.

    • Options
    • A. liquid metal cooled
    • B. fast breeder
    • C. thermal
    • D. swimming pool
    • Discuss
    • 3. Thermal shield is used in high powered nuclear reactors to

    • Options
    • A. protect the walls of the reactor from radiation damage.
    • B. absorb the fast neutrons.
    • C. slow down the secondary neutrons.
    • D. protect the fuel element from coming in contact with the coolant.
    • Discuss
    • 4. The half life period of a radioactive element depends on its

    • Options
    • A. temperature
    • B. pressure
    • C. amount
    • D. none of these
    • Discuss
    • 5. __________ have the same mass number, but different nuclear charge.

    • Options
    • A. Isotopes
    • B. Isobars
    • C. Isotones
    • D. none of these
    • Discuss
    • 6. Graphite is used in nuclear reactor as

    • Options
    • A. insulation lining of the reactor.
    • B. fuel.
    • C. lubricant.
    • D. retarder of neutron velocity.
    • Discuss
    • 7. The most commonly used nuclear fuel in boiling water reactor is

    • Options
    • A. enriched uranium
    • B. natural uranium
    • C. plutonium
    • D. monazite sand
    • Discuss
    • 8. If 4 gm of a radioisotope has a half life period of 10 days, the half life of 2 gm of the same istotope will be __________ days.

    • Options
    • A. 5
    • B. 10
    • C. 20
    • D. 30
    • Discuss
    • 9. Thermal neutrons which are used to cause the fission of U-235 have energy __________ eV.

    • Options
    • A. < 0.025
    • B. > 1
    • C. 1-25
    • D. > 200.
    • Discuss
    • 10. Fast breeder nuclear reactors using enriched uranium as fuel may contain upto a maximum of __________ percent of U-235 (i.e. fissile material).

    • Options
    • A. 15
    • B. 45
    • C. 65
    • D. 85
    • Discuss


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