MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 17 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. |
\'Heavy water\' is termed as \'heavy\' because it is |
| A. | an oxide of deuterium. |
| B. | denser than water. |
| C. | an oxide of heavier isotope of oxygen |
| D. | a heavy liquid |
| Answer» B. denser than water. | |
| 2. |
The number of neutrons accompanying the formation of 54 Xe 139 and 38 Sr 94 from the absorption of a slow neutron by 92 U 235 , followed by nuclear fission is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 3. |
The 92 U 238 emits an a-particle. The product is |
| A. | 90 U 234 |
| B. | 90 U 238 |
| C. | 90 U 236 |
| D. | 92 U 236 |
| Answer» B. 90 U 238 | |
| 4. |
Pressure of CO 2 gas (which is a coolant) in the Calder-Hall nuclear reactor is __________ kgf/cm 2 . |
| A. | 0.2 |
| B. | 7 |
| C. | 35 |
| D. | 50 |
| Answer» C. 35 | |
| 5. |
The number of neutrons in the nucleus of Uranium-233 ( 92 U 233 ) is |
| A. | 141 |
| B. | 92 |
| C. | 233 |
| D. | 325 |
| Answer» B. 92 | |
| 6. |
Heavy water (D 2 O) in a nuclear reactor serves as a |
| A. | coolant |
| B. | moderator |
| C. | both (a) & (b) |
| D. | neutron absorber |
| Answer» D. neutron absorber | |
| 7. |
H 2 is a better coolant than CO 2 , 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. | |
| 8. |
The specific heats of three gaseous coolants namely H 2 , He and CO 2 in the increasing order are |
| A. | CO 2 , He, H 2 |
| B. | CO 2 , H 2 , He |
| C. | H 2 , He, CO 2 |
| D. | H 2 , CO 2 , He |
| Answer» B. CO 2 , H 2 , He | |
| 9. |
In the nuclear reaction, 93 N 239 94 Pu 239 + ?; the missing particle is a/an |
| A. | electron |
| B. | proton |
| C. | neutron |
| D. | position |
| Answer» B. proton | |
| 10. |
Primary purpose of a __________ nuclear reactor is to supply a high neutron flux of the order of 10 13 to 10 14 neutrons/cm 2 second. |
| A. | research |
| B. | power |
| C. | breeder |
| D. | homogeneous |
| Answer» B. power | |
| 11. |
Nucleus of 92 U 235 contains __________ protons. |
| A. | 92 |
| B. | 235 |
| C. | 143 |
| D. | 325 |
| Answer» B. 235 | |
| 12. |
Heavy water has maximum density at __________ °C. |
| A. | 4 |
| B. | 11.6 |
| C. | 0 |
| D. | 18.6 |
| Answer» C. 0 | |
| 13. |
The half life period of a radioactive element depends upon the |
| A. | temperature |
| B. | pressure |
| C. | amount of element present |
| D. | none of these |
| Answer» E. | |
| 14. |
Light water' used as a coolant in nuclear reactor is nothing but |
| A. | ordinary water. |
| B. | mildly acidic (pH = 6) water. |
| C. | mildly alkaline (pH = 8) water. |
| D. | none of these. |
| Answer» B. mildly acidic (pH = 6) water. | |
| 15. |
Heavy water' is termed as 'heavy' because it is |
| A. | denser than water. |
| B. | an oxide of deuterium. |
| C. | a heavy liquid. |
| D. | an oxide of heavier isotope of oxygen. |
| Answer» C. a heavy liquid. | |
| 16. |
Water is a better coolant than a gas (like CO 2 , He, N 2 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. | |
| 17. |
Sodium melts (at atmospheric pressure) at a temperature of __________ °C. |
| A. | 58 |
| B. | 98 |
| C. | 348 |
| D. | 588 |
| Answer» C. 348 | |