MCQOPTIONS
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MCQOPTIONS
This section includes 486 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Nucleus of U contains __________ protons. |
| A. | 92 |
| B. | 235 |
| C. | 143 |
| D. | 325 |
| Answer» B. 235 | |
| 2. |
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 |
| Answer» B. α-rays | |
| 3. |
Water is a better coolant than a gas (like CO, He, N etc.), because it |
| A. | is a better neutron moderator as well. |
| B. | requires comparatively smaller pumps and heat exchanger for a given heat transfer rate. |
| C. | has a better heat transfer characteristics, and it can be pressurised to attain a high temperature. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 4. |
In β-decay of radioactive material, the ratio of neutron to proton |
| A. | increases. |
| B. | remains same. |
| C. | decreases. |
| D. | is unpredictable; may increase or decrease. |
| Answer» D. is unpredictable; may increase or decrease. | |
| 5. |
Heavy water has maximum density at __________ °C. |
| A. | 4 |
| B. | 11.6 |
| C. | 0 |
| D. | 18.6 |
| Answer» C. 0 | |
| 6. |
Primary purpose of a __________ nuclear reactor is to supply a high neutron flux of the order of 10 to 10 neutrons/cm second. |
| A. | research |
| B. | power |
| C. | breeder |
| D. | homogeneous |
| Answer» B. power | |
| 7. |
The U emits an a-particle. The product is |
| A. | U |
| B. | U |
| C. | U |
| D. | U |
| Answer» B. U | |
| 8. |
H is a better coolant than CO, due to its relatively |
| A. | lower density. |
| B. | higher specific heat. |
| C. | non-reactivity to uranium. |
| D. | lower neutron capture cross-section. |
| Answer» C. non-reactivity to uranium. | |
| 9. |
The number of neutrons in the nucleus of Uranium-233 (U) is |
| A. | 141 |
| B. | 92 |
| C. | 233 |
| D. | 325 |
| Answer» B. 92 | |
| 10. |
The number of neutrons accompanying the formation of Xe and Sr from the absorption of a slow neutron by U , followed by nuclear fission is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 11. |
In the nuclear reaction, N Pu + ?; the missing particle is a/an |
| A. | electron |
| B. | proton |
| C. | neutron |
| D. | position |
| Answer» B. proton | |
| 12. |
Pressure of CO gas (which is a coolant) in the Calder-Hall nuclear reactor is __________ kgf/cm . |
| A. | 0.2 |
| B. | 7 |
| C. | 35 |
| D. | 50 |
| Answer» C. 35 | |
| 13. |
Heavy water (DO) in a nuclear reactor serves as a |
| A. | coolant |
| B. | moderator |
| C. | both (a) & (b) |
| D. | neutron absorber |
| Answer» D. neutron absorber | |
| 14. |
Sodium melts (at atmospheric pressure) at a temperature of __________ °C. |
| A. | 58 |
| B. | 98 |
| C. | 348 |
| D. | 588 |
| Answer» C. 348 | |
| 15. |
Which of the following factors is the most important in the site selection for a nuclear power plant? |
| A. | bsence of earthquake prone zone in nearby areas |
| B. | bundant availability of water |
| C. | emotely located from residential areas |
| D. | roximity to fuel source |
| Answer» B. bundant availability of water | |
| 16. |
Which of the following nuclear reactors is the most efficient thermodynamically while operating between the same temperature and pressure limits of the reactor? |
| A. | olten sodium cooled |
| B. | O₂ gas cooled |
| C. | ressurised water |
| D. | oiling water |
| Answer» E. | |
| 17. |
Which of the following is present in Bhabha Atomic Research Centre (BARC) complex, Trombay (Bombay)? |
| A. | ower reactor |
| B. | esearch reactor |
| C. | ast breeder reactor |
| D. | eavy water plant |
| Answer» C. ast breeder reactor | |
| 18. |
In the nuclear reaction, 93N239 → 93Pu239 + ?; the missing particle is a/an |
| A. | lectron |
| B. | roton |
| C. | eutron |
| D. | osition |
| Answer» B. roton | |
| 19. |
Nucleus of 92U235 contains __________ protons. |
| A. | 2 |
| B. | 35 |
| C. | 43 |
| D. | 25 |
| Answer» B. 35 | |
| 20. |
In the nuclear reaction, ₉₃N²³⁹ → ₉₄Pu²³⁹ + ?; the missing particle is a/an |
| A. | electron |
| B. | proton |
| C. | neutron |
| D. | position |
| Answer» B. proton | |
| 21. |
The number of neutrons in the nucleus of Uranium-233 (₉₂U²³³) is |
| A. | 141 |
| B. | 92 |
| C. | 233 |
| D. | 325 |
| Answer» B. 92 | |
| 22. |
The ₉₂U²³⁸ emits an a-particle. The product is |
| A. | ₉₀U²³⁴ |
| B. | ₉₀U²³⁸ |
| C. | ₉₀U²³⁶ |
| D. | ₉₂U²³⁶ |
| Answer» B. ₉₀U²³⁸ | |
| 23. |
Nucleus of ₉₂U²³⁵ contains __________ protons. |
| A. | 92 |
| B. | 235 |
| C. | 143 |
| D. | 325 |
| Answer» B. 235 | |
| 24. |
The number of neutrons accompanying the formation of ₅₄Xe¹³⁹ and ₃₈Sr⁹⁴ from the absorption of a slow neutron by ₉₂U²³⁵ , followed by nuclear fission is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 25. |
In the nuclear reaction, 93N239 → 93Pu239 + ?; the missing particle is a/an |
| A. | Electron |
| B. | Proton |
| C. | Neutron |
| D. | Position |
| Answer» B. Proton | |
| 26. |
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 |
| Answer» D. Plutonium⁻²39 | |
| 27. |
Which of the following accounts for the maximum energy release in the nuclear fission process? |
| A. | Kinetic energy of fission products |
| B. | Radioactive decay of fission products |
| C. | Instantaneous release of γ-rays |
| D. | Kinetic energy of neutrons |
| Answer» B. Radioactive decay of fission products | |
| 28. |
Sodium melts (at atmospheric pressure) at a temperature of __________ °C. |
| A. | 58 |
| B. | 98 |
| C. | 348 |
| D. | 588 |
| Answer» C. 348 | |
| 29. |
The new nucleus formed after β-decay of a radioactive element has |
| A. | Less atomic number |
| B. | Less atomic weight |
| C. | More atomic number |
| D. | More atomic weight |
| Answer» B. Less atomic weight | |
| 30. |
The number of neutrons in the nucleus of Uranium⁻²33 (92U233) is |
| A. | 141 |
| B. | 92 |
| C. | 233 |
| D. | 325 |
| Answer» B. 92 | |
| 31. |
In β-decay of radioactive material, the ratio of neutron to proton |
| A. | Increases |
| B. | Remains same |
| C. | Decreases |
| D. | Is unpredictable; may increase or decrease |
| Answer» D. Is unpredictable; may increase or decrease | |
| 32. |
In a nuclear explosion, the energy is released primarily in the form of __________ energy. |
| A. | Potential |
| B. | Thermal |
| C. | Kinetic |
| D. | Electrical |
| Answer» D. Electrical | |
| 33. |
Which of the following isotopes is not present in natural uranium? |
| A. | U-238 |
| B. | U-234 |
| C. | U-235 |
| D. | U-232 |
| Answer» E. | |
| 34. |
Which is not a fissile nuclear material? |
| A. | U-233 |
| B. | U-235 |
| C. | U-238 |
| D. | Pu-239 |
| Answer» D. Pu-239 | |
| 35. |
Which of the following reactors is operated at high neutron flux and low power level? |
| A. | Breeder reactor |
| B. | Research reactor |
| C. | Heterogeneous reactor |
| D. | Liquid metal (e.g., molten sodium) cooled reactor |
| Answer» C. Heterogeneous reactor | |
| 36. |
Which of the following is a moderating material used in nuclear reactor? |
| A. | Graphite |
| B. | Cadmium |
| C. | Zircalloy (an alloy of zirconium and aluminium) |
| D. | Stainless steel |
| Answer» B. Cadmium | |
| 37. |
Which of the following types of nuclear reactors is most prone to radioactive hazards? |
| A. | Pressurised water reactor |
| B. | Gas cooled reactor |
| C. | Molten sodium cooled reactor |
| D. | Boiling water reactor |
| Answer» E. | |
| 38. |
The specific heats of three gaseous coolants namely H₂, He and CO₂ in the increasing order are |
| A. | CO₂, He, H₂ |
| B. | CO₂, H₂, He |
| C. | H₂, He, CO₂ |
| D. | H₂, CO₂, He |
| Answer» B. CO₂, H₂, He | |
| 39. |
Which of the following is a non-fissile material? |
| A. | Plutonium⁻²39 |
| B. | Uranium⁻²35 |
| C. | Uranium⁻²33 |
| D. | Thorium⁻²32 |
| Answer» E. | |
| 40. |
Which of the following is not used as a moderator in nuclear reactor? |
| A. | Molten sodium |
| B. | Light water |
| C. | Beryllium |
| D. | Boron hydride |
| Answer» B. Light water | |
| 41. |
Which one is the radioactive isotope of hydrogen? |
| A. | Deuterium |
| B. | Ortho-hydrogen |
| C. | Tritium |
| D. | None of these |
| Answer» D. None of these | |
| 42. |
Heavy water has maximum density at __________ °C. |
| A. | 4 |
| B. | 11.6 |
| C. | 0 |
| D. | 18.6 |
| Answer» C. 0 | |
| 43. |
H₂ is a better coolant than CO₂, due to its relatively |
| A. | Lower density |
| B. | Higher specific heat |
| C. | Non-reactivity to uranium |
| D. | Lower neutron capture cross-section |
| Answer» C. Non-reactivity to uranium | |
| 44. |
Which of the following undergoes fission reaction easily? |
| A. | U-235 |
| B. | U-238 |
| C. | Th-232 |
| D. | None of these |
| Answer» B. U-238 | |
| 45. |
Which of the following may not need a control rod? |
| A. | Liquid metal cooled reactor |
| B. | Fast breeder reactor |
| C. | Candu reactor |
| D. | None of these |
| Answer» E. | |
| 46. |
Which of the following is not, a fertile material? |
| A. | Th-232 |
| B. | U-238 |
| C. | U-233 |
| D. | None of these |
| Answer» D. None of these | |
| 47. |
The number of neutrons accompanying the formation of 54Xe139 and 38Sr94 from the absorption of a slow neutron by 92U235 , followed by nuclear fission is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 48. |
Which one is different for the neutral atoms of the isotopes of an element? |
| A. | Atomic weights |
| B. | Atomic numbers |
| C. | Number of protons |
| D. | Number of electrons |
| Answer» B. Atomic numbers | |
| 49. |
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 |
| Answer» C. 35 | |
| 50. |
Emission of β-particles during radioactive decay of a substance is from |
| A. | Innermost shell |
| B. | Nucleus |
| C. | Outermost shell |
| D. | None of these |
| Answer» C. Outermost shell | |