Nuclear Power Engineering Jobs Interview Questions - Set 02 - ObjectiveBooks

Nuclear Power Engineering Jobs Interview Questions - Set 02

Practice Test: Question Set - 02


1. The time taken for a radioactive element to reduce to 50% of its original weight is __________ years, if its half life period is 12 years.
    (A) 24
    (B) 18
    (C) 6
    (D) 36

2. Which of the following is not a good moderating material?
    (A) Concrete
    (B) Boron
    (C) 18/8 stainless steel
    (D) All (a), (b) and (c)

3. Primary purpose of a __________ nuclear reactor is to supply a high neutron flux of the order of 1013 to 1014neutrons/cm2 second.
    (A) Research
    (B) Power
    (C) Breeder
    (D) Homogeneous

4. The electric power generation cost in nuclear power plant is less than that in a coal based thermal power plant, mainly because the
    (A) Fuel cost per unit power generated is less
    (B) Thermal efficiency of the former is higher
    (C) Maintenance cost of the former is less
    (D) None of these

5. 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

6. Which is used as a coolant in nuclear reactor due to its high capture cross-section?
    (A) H2
    (B) N2
    (C) He
    (D) CO2

7. Water is a better coolant than a gas (like CO2, He, N2 etc.), because it
    (A) Is a better neutron moderator as well
    (B) Require comparatively smaller pumps and heat exchanger for a given heat transfer rate
    (C) Has a better heat transfer characteristics, and it can be pressurized to attain a high temperature
    (D) All (a), (b) and (c)

8. β-rays emission in radioactive disintegration is always accompanied by the emission of
    (A) γ-rays
    (B) α-rays
    (C) Neutrons
    (D) None of these

9. Fuel for a nuclear reactor (thermal) is
    (A) Uranium
    (B) Plutonium
    (C) Radium
    (D) None of these

10. Final product of uranium extraction plant at Jadugoda (Bihar) is
    (A) Uranium
    (B) Uranium oxide
    (C) Uranium carbide
    (D) Magnesium diuranate

11. 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

12. Thorium-232 (a fertile material) on absorption of a neutron gets converted into __________ , which is a fissile material.
    (A) Thorium-233
    (B) Uranium-235
    (C) Uranium-233
    (D) Plutonium-239

13. The first underground nuclear test was conducted by India at
    (A) Jaisalmer
    (B) Pokharan
    (C) Kalpakkam
    (D) Narora

14. The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half life period of a radioactive substance is one month, then
    (A) 3/4th of it will disintegrate in two months
    (B) It will completely disintegrate in two months
    (C) It will completely disintegrate in four months
    (D) 1/8th of it will remain intact at the end of four months

15. Tarapur (INDIA) atomic power station
    (A) Has two boiling water reactors of American design
    (B) Has an installed capacity of 400 MW
    (C) Is the first power reactor in India, which became critical in 1969
    (D) All (a), (b) and (c)

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