MCQOPTIONS
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MCQOPTIONS
This section includes 160 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
A moderator _____________ the neutrons? |
| A. | Slows down |
| B. | Absorbs |
| C. | Accelerates |
| D. | Reflects |
| Answer» B. Absorbs | |
| 152. |
A homogeneous reactor is the one, in which the___________________? |
| A. | Fissile atoms are evenly distributed throughout the mass of nuclear reactor |
| B. | Same substance (e.g. heavy water) is used as moderator & coolant |
| C. | The fuel and the moderator is mixed to form a homogeneous material |
| D. | All A., B. and C. |
| Answer» D. All A., B. and C. | |
| 153. |
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 |
| Answer» D. None of these | |
| 154. |
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 |
| Answer» B. Fissioned by slow (thermal) neutrons | |
| 155. |
A fast breeder reactor____________________? |
| A. | Uses natural uranium as fuel |
| B. | Does not require a moderator |
| C. | Both A. and B. |
| D. | Neither A. nor B. |
| Answer» C. Both A. and B. | |
| 156. |
A fast breeder reactor employs___________________? |
| A. | Graphite as moderator |
| B. | Water as coolant |
| C. | Molten sodium as coolant as well as moderator |
| D. | U-235 as fuel |
| Answer» E. | |
| 157. |
A control rod________________? |
| A. | Should have small absorption cross-section |
| B. | Is generally made of boron, hafnium or cadmium |
| C. | Should have large absorption cross-section |
| D. | Both B. and C. |
| Answer» E. | |
| 158. |
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. | Pressurised water is pumped into the core |
| D. | Fuel and the coolant are thoroughly mixed to form a homogeneous solution |
| Answer» B. Coolant water, after being heated in the reactor core, generates steam in a boiler | |
| 159. |
75% of a radioactive element decays in 6 hours. Its half life period is ______________ hours? |
| A. | 3/4 |
| B. | 1/6 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 160. |
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 | |